Free Standard AU & NZ Shipping For All Book Orders Over $80!
Register      Login
Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE (Open Access)

Mutagenicity of N-acyloxy-N-alkoxyamides – QSAR determination of factors controlling activity

Stephen A. Glover https://orcid.org/0000-0002-9344-8669 A *
+ Author Affiliations
- Author Affiliations

A Department of Chemistry, School of Physical Sciences, University of New England, NSW 2350, Australia.

* Correspondence to: sglover@une.edu.au

Handling Editor: Curt Wentrup

Australian Journal of Chemistry 76(1) 1-24 https://doi.org/10.1071/CH22205
Submitted: 23 September 2022  Accepted: 27 October 2022   Published: 19 January 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

This account describes the origins of our extensive investigations into the mutagenicity of N-acyloxy-N-alkoxyamides. Since their discovery as biologically active anomeric amides that mutate DNA in the Ames reverse mutation assay without the need for metabolic activation, we have used activities in the Ames test to understand the impact of structural variation on cellular access to, binding to and reactivity with DNA. We have developed an understanding of the roles played by hydrophobicity, electrophilic reactivity, steric effects and, importantly, intercalation on mutagenicity levels and therefore interactions with DNA. The evolution and application of meaningful quantitative structure–activity relationships is described, and examples of their utility in explaining molecule–DNA interactions are given. Their ability to explain previous mutagenicity data and, importantly, to predict meaningful mutagenic behaviour is also demonstrated.

Keywords: acyloxy alkoxyamides, ames mutagenicity, anomeric amides, bilinear QSAR, deamination, direct‐acting mutagenicity, DNA binding, groove binding, HERON reactions, intercalation, linear QSAR, mutagenic amides, nitrogen deletion, PAH, pyramidal amides, QSAR, quantitative structure‐activity relationship, skeletal editing, TA98, TA100​​​​​​.


References

[1]  SA Glover, Anomeric Amides — Structure, Properties and Reactivity. Tetrahedron 1998, 54, 7229.
         | Anomeric Amides — Structure, Properties and Reactivity.Crossref | GoogleScholarGoogle Scholar |

[2]  IV Alabugin, S Bresch, M Manoharan, Hybridization Trends for Main Group Elements and Expanding the Bent’s Rule Beyond Carbon: More than Electronegativity. J Phys Chem A 2014, 118, 3663.
         | Hybridization Trends for Main Group Elements and Expanding the Bent’s Rule Beyond Carbon: More than Electronegativity.Crossref | GoogleScholarGoogle Scholar |

[3]  HA Bent, An Appraisal of Valence-bond Structures and Hybridization in Compounds of the First-row Elements. Chem Rev 1961, 61, 275.
         | An Appraisal of Valence-bond Structures and Hybridization in Compounds of the First-row Elements.Crossref | GoogleScholarGoogle Scholar |

[4]  A Rauk, SA Glover, A Computational Investigation of the Stereoisomerism in Heteroatom-substituted Amides. J Org Chem 1996, 61, 2337.
         | A Computational Investigation of the Stereoisomerism in Heteroatom-substituted Amides.Crossref | GoogleScholarGoogle Scholar |

[5]  SA Glover, A Rauk, Conformational Stereochemistry of the HERON Amide, N-methoxy-N-dimethylaminoformamide: a Theoretical Study. J Org Chem 1999, 64, 2340.
         | Conformational Stereochemistry of the HERON Amide, N-methoxy-N-dimethylaminoformamide: a Theoretical Study.Crossref | GoogleScholarGoogle Scholar |

[6]  SA Glover, G Mo, A Rauk, DJ Tucker, P Turner, Structure, conformation, anomeric effects and rotational barriers in the HERON amides, N,N’-diacyl-N,N’-dialkoxyhydrazines. J Chem Soc, Perkin Trans 2 1999, 2053.
         | Structure, conformation, anomeric effects and rotational barriers in the HERON amides, N,N’-diacyl-N,N’-dialkoxyhydrazines.Crossref | GoogleScholarGoogle Scholar |

[7]  A-ME Gillson, SA Glover, DJ Tucker, P Turner, Crystal structures and properties of mutagenic N-acyloxy-N-alkoxyamides — ‘most pyramidal’ acyclic amides. Org Biomol Chem 2003, 1, 3430.
         | Crystal structures and properties of mutagenic N-acyloxy-N-alkoxyamides — ‘most pyramidal’ acyclic amides.Crossref | GoogleScholarGoogle Scholar |

[8]  Glover SA. N-Acyloxy-N-alkoxyamide – Structure, properties, reactivity and biological activity. In Richard J, editor. Advances in Physical Organic Chemistry. Vol. 42. London: Elsevier; 2008. pp. 35–123.

[9]  Glover SA. N-Heteroatom-substituted hydroxamic esters. In Rappoport Z, Liebman JF, editors. The Chemistry of Hydroxylamines, Oximes and Hydroxamic, Acids, Part 2. Chichester: Wiley; 2009. pp. 839–923.

[10]  SA Glover, JM White, AA Rosser, KM Digianantonio, Structures of N,N-Dialkoxyamides: Pyramidal Anomeric Amides with Low Amidicity. J Org Chem 2011, 76, 9757.
         | Structures of N,N-Dialkoxyamides: Pyramidal Anomeric Amides with Low Amidicity.Crossref | GoogleScholarGoogle Scholar |

[11]  SA Glover, AA Rosser, A Taherpour, BW Greatrex, Formation and HERON Reactivity of Cyclic N,N-Dialkoxyamides. Aust J Chem 2014, 67, 507.
         | Formation and HERON Reactivity of Cyclic N,N-Dialkoxyamides.Crossref | GoogleScholarGoogle Scholar |

[12]  SA Glover, AA Rosser, RM Spence, Studies of the Structure, Amidicity and Reactivity of N-Chlorohydroxamic Esters and N-Chloro-β,β-dialkylhydrazides: Anomeric Amides with Low Resonance Energies. Aust J Chem 2014, 67, 1344.
         | Studies of the Structure, Amidicity and Reactivity of N-Chlorohydroxamic Esters and N-Chloro-β,β-dialkylhydrazides: Anomeric Amides with Low Resonance Energies.Crossref | GoogleScholarGoogle Scholar |

[13]  SA Glover, AA Rosser, Heteroatom Substitution at Amide Nitrogen – Resonance Reduction and HERON Reactions of Anomeric Amides. Molecules 2018, 23, 2834.
         | Heteroatom Substitution at Amide Nitrogen – Resonance Reduction and HERON Reactions of Anomeric Amides.Crossref | GoogleScholarGoogle Scholar |

[14]  AM Bonin, SA Glover, GP Hammond, Reactive intermediates from the solvolysis of mutagenic O-alkyl N-acetoxybenzohydroxamates. J Chem Soc, Perkin Trans 2 1994, 1173.
         | Reactive intermediates from the solvolysis of mutagenic O-alkyl N-acetoxybenzohydroxamates.Crossref | GoogleScholarGoogle Scholar |

[15]  JJ Campbell, SA Glover, GP Hammond, CA Rowbottom, Evidence for the Formation of Nitrenium ions in the Acid-catalysed Solvolysis of Mutagenic N-acetoxy-N-Alkoxybenzamides. J Chem Soc, Perkin Trans 2 1991, 2067.
         | Evidence for the Formation of Nitrenium ions in the Acid-catalysed Solvolysis of Mutagenic N-acetoxy-N-Alkoxybenzamides.Crossref | GoogleScholarGoogle Scholar |

[16]  KL Cavanagh, SA Glover, HL Price, RR Schumacher, SN2 Substitution Reactions at the Amide Nitrogen in the Anomeric Mutagens, N-Acyloxy-N-alkoxyamides. Aust J Chem 2009, 62, 700.
         | SN2 Substitution Reactions at the Amide Nitrogen in the Anomeric Mutagens, N-Acyloxy-N-alkoxyamides.Crossref | GoogleScholarGoogle Scholar |

[17]  SA Glover, SN2 reactions at amide nitrogen – theoretical models for reactions of mutagenic N-acyloxy-N-alkoxyamides with bionucleophiles (OT-308CP). Arkivoc 2001, 143.
         | SN2 reactions at amide nitrogen – theoretical models for reactions of mutagenic N-acyloxy-N-alkoxyamides with bionucleophiles (OT-308CP).Crossref | GoogleScholarGoogle Scholar |

[18]  JJ Campbell, SA Glover, Bimolecular Reactions of Mutagenic N-(Acyloxy)-N-alkoxybenzamides with Aromatic Amines. J Chem Res (S). 1999, 23, 474.
         | Bimolecular Reactions of Mutagenic N-(Acyloxy)-N-alkoxybenzamides with Aromatic Amines.Crossref | GoogleScholarGoogle Scholar |

[19]  JJ Campbell, SA Glover, Bimolecular Reactions of Mutagenic N-(Acyloxy)-N-alkoxybenzamides with Aromatic Amines. J Chem Res (M). 1999, 23, 2075.

[20]  JJ Campbell, SA Glover, Bimolecular Reactions of Mutagenic N-Acetoxy-N-alkoxybenzamides and N-methylaniline. J Chem Soc, Perkin Trans 2 1992, 1661.
         | Bimolecular Reactions of Mutagenic N-Acetoxy-N-alkoxybenzamides and N-methylaniline.Crossref | GoogleScholarGoogle Scholar |

[21]  SA Glover, G Mo, Hindered ester formation by SN2 azidation of N-acetoxy-N-alkoxyamides and N-alkoxy-N-chloroamides—Novel application of HERON rearrangements. J Chem Soc, Perkin Trans 2 2002, 1728.
         | Hindered ester formation by SN2 azidation of N-acetoxy-N-alkoxyamides and N-alkoxy-N-chloroamides—Novel application of HERON rearrangements.Crossref | GoogleScholarGoogle Scholar |

[22]  SA Glover, GP Hammond, AM Bonin, A Comparison of the Reactivity and Mutagenicity of N-(Benzoyloxy)-N-(benzyloxy)benzamides. J Org Chem 1998, 63, 9684.
         | A Comparison of the Reactivity and Mutagenicity of N-(Benzoyloxy)-N-(benzyloxy)benzamides.Crossref | GoogleScholarGoogle Scholar |

[23]  SA Glover, M Adams, Reaction of N-acyloxy-N-alkoxyamides with Biological Thiol groups. Aust J Chem 2011, 64, 443.
         | Reaction of N-acyloxy-N-alkoxyamides with Biological Thiol groups.Crossref | GoogleScholarGoogle Scholar |

[24]  JP Johns, A van Losenoord, C Mary, P Garcia, DS Pankhurst, AA Rosser, SA Glover, Thermal Decomposition of N-Acyloxy-N-alkoxyamides – a New HERON Reaction. Aust J Chem 2010, 63, 1717.
         | Thermal Decomposition of N-Acyloxy-N-alkoxyamides – a New HERON Reaction.Crossref | GoogleScholarGoogle Scholar |

[25]  Beland FA, Kadlubar FF. Metabolic activation and DNA adducts of aromatic amines and nitroaromatic hydrocarbons. In Cooper CS, Grover PL, editors. Chemical Carcinogenesis and Mutagenesis, 8 edn. Secaucus, NJ: Springer Verlag; 1990. pp. 267–325.

[26]  FA Beland, FF Kadlubar, Formation and Persistence of Arylamine DNA Adducts in Vivo. Environ Health Perspect 1985, 62, 19.
         | Formation and Persistence of Arylamine DNA Adducts in Vivo.Crossref | GoogleScholarGoogle Scholar |

[27]  GM Blackburn, B Kellard, Chemical carcinogens - II. Chem Ind 1986, 687.

[28]  D Kim, FP Guengerich, Cytochrome P450 Activation of Arylamines and Heterocyclic Amines. Annu Rev Pharmacol Toxicol 2005, 45, 27.
         | Cytochrome P450 Activation of Arylamines and Heterocyclic Amines.Crossref | GoogleScholarGoogle Scholar |

[29]  JA Miller, EC Miller, Some Historical Aspects of N-Aryl Carcinogens and Their Metabolic Activation. Environ Health Perspect 1983, 49, 3.
         | Some Historical Aspects of N-Aryl Carcinogens and Their Metabolic Activation.Crossref | GoogleScholarGoogle Scholar |

[30]  M Novak, S Rajagopal, N-arylnitrenium ions. Adv Phys Org Chem 2001, 36, 167.
         | N-arylnitrenium ions.Crossref | GoogleScholarGoogle Scholar |

[31]  M Novak, S Rajagopal, Correlations of Nitrenium Ion Selectivities with Quantitative Mutagenicity and Carcinogenicity of the Corresponding Amines. Chem Res Toxicol 2002, 15, 1495.
         | Correlations of Nitrenium Ion Selectivities with Quantitative Mutagenicity and Carcinogenicity of the Corresponding Amines.Crossref | GoogleScholarGoogle Scholar |

[32]  M Novak, MJ Kahley, E Eiger, JS Helmick, HE Peters, Reactivity and Selectivity Of Nitrenium Ions Derived from Ester Derivatives of Carcinogenic N-(4-Biphenylyl)hydroxylamine and the Corresponding Hydroxamic Acid. J Am Chem Soc 1993, 115, 9453.
         | Reactivity and Selectivity Of Nitrenium Ions Derived from Ester Derivatives of Carcinogenic N-(4-Biphenylyl)hydroxylamine and the Corresponding Hydroxamic Acid.Crossref | GoogleScholarGoogle Scholar |

[33]  PA Davidse, MJ Kahley, RA McClelland, M Novak, Flash Photolysis Observation and Lifetimes of 2-Fluorenyl- and 4-Biphenylylacetylnitrenium Ions in Aqueous Solution. J Am Chem Soc 1994, 116, 4513.
         | Flash Photolysis Observation and Lifetimes of 2-Fluorenyl- and 4-Biphenylylacetylnitrenium Ions in Aqueous Solution.Crossref | GoogleScholarGoogle Scholar |

[34]  RG Gerdes, SA Glover, JF Ten Have, CA Rowbottom, N-Acetoxy-N-alkoxyamides - a new class of nitrenium ion precursors, which are mutagenic. Tetrahedron Lett 1989, 30, 2649.
         | N-Acetoxy-N-alkoxyamides - a new class of nitrenium ion precursors, which are mutagenic.Crossref | GoogleScholarGoogle Scholar |

[35]  JJ Campbell, SA Glover, CA Rowbottom, Solvolysis and Mutagenesis of N-Acetoxy-N-Alkoxybenzamides — Evidence for Nitrenium Ion Formation. Tetrahedron Lett 1990, 31, 5377.
         | Solvolysis and Mutagenesis of N-Acetoxy-N-Alkoxybenzamides — Evidence for Nitrenium Ion Formation.Crossref | GoogleScholarGoogle Scholar |

[36]  SA Glover, AP Scott, MNDO properties of heteroatom and phenyl-substituted nitrenium ions. Tetrahedron 1989, 45, 1763.
         | MNDO properties of heteroatom and phenyl-substituted nitrenium ions.Crossref | GoogleScholarGoogle Scholar |

[37]  SA Glover, A Goosen, CW McCleland, JL Schoonraad, N-Alkoxy-N-acylnitrenium Ions as Possible Intermediates in Intramolecular Aromatic Substitution: Novel Formation of N-Acyl-3,4-dihydro-1H-2,1-benzoxazines and N-Acyl-4,5-dihydro-1H,3H-2,1-benzoxazepine. J Chem Soc, Perkin Trans 1 1984, 2255.
         | N-Alkoxy-N-acylnitrenium Ions as Possible Intermediates in Intramolecular Aromatic Substitution: Novel Formation of N-Acyl-3,4-dihydro-1H-2,1-benzoxazines and N-Acyl-4,5-dihydro-1H,3H-2,1-benzoxazepine.Crossref | GoogleScholarGoogle Scholar |

[38]  TM Banks, AM Bonin, SA Glover, AS Prakash, Mutagenicity and DNA Damage Studies of N-acyloxy-N-alkoxyamides — the Role of Electrophilic Nitrogen. Org Biomol Chem 2003, 1, 2238.
         | Mutagenicity and DNA Damage Studies of N-acyloxy-N-alkoxyamides — the Role of Electrophilic Nitrogen.Crossref | GoogleScholarGoogle Scholar |

[39]  Banks TM. Reactivity, Mutagenicity and DNA damage of N-Acyloxy-N-alkoxyamides. PhD thesis, University of New England, Armidale; 2003.

[40]  AM Bonin, TM Banks, JJ Campbell, SA Glover, GP Hammond, AS Prakash, CA Rowbottom, Mutagenicity of Electrophilic N-acyloxy-N-alkoxyamides. Mutat Res Genet Toxicol Environ Mutagen 2001, 494, 115.
         | Mutagenicity of Electrophilic N-acyloxy-N-alkoxyamides.Crossref | GoogleScholarGoogle Scholar |

[41]  K Mortelmans, E Zeiger, The Ames Salmonella/microsome mutagenicity assay. Mutat Res Fundam Mol Mech Mutagen 2000, 455, 29.
         | The Ames Salmonella/microsome mutagenicity assay.Crossref | GoogleScholarGoogle Scholar |

[42]  TM Banks, SF Clay, SA Glover, RR Schumacher, Mutagenicity of N-acyloxy-N-alkoxyamides as an indicator of DNA intercalation Part 1: Evidence for naphthalene as a DNA intercalator. Org Biomol Chem 2016, 14, 3699.
         | Mutagenicity of N-acyloxy-N-alkoxyamides as an indicator of DNA intercalation Part 1: Evidence for naphthalene as a DNA intercalator.Crossref | GoogleScholarGoogle Scholar |

[43]  Hansch C, Leo AJ. Exploring QSAR, Fundamentals and Applications in Chemistry and Biology, Part I. Washington DC: American Chemical Society; 1995.

[44]  AK Debnath, AJ Shusterman, RL Lopez de Compadre, C Hansch, The importance of the hydrophobic interaction in the mutagenicity of organic compounds. Mutat Res Fundam Mol Mech Mutagen 1994, 305, 63.
         | The importance of the hydrophobic interaction in the mutagenicity of organic compounds.Crossref | GoogleScholarGoogle Scholar |

[45]  AK Debnath, C Hansch, The importance of hydrophobicity in the mutagenicity of methanesulfonic acid esters with salmonella typhimurium TA100. Chem Res Toxicol 1993, 6, 310.
         | The importance of hydrophobicity in the mutagenicity of methanesulfonic acid esters with salmonella typhimurium TA100.Crossref | GoogleScholarGoogle Scholar |

[46]  AK Debnath, RL Lopez de Compadre, G Debnath, AJ Shusterman, C Hansch, Structure–activity relationship of mutagenic aromatic and heteroaromatic nitro compounds. Correlation with molecular orbital energies and hydrophobicity. J Med Chem 1991, 34, 786.
         | Structure–activity relationship of mutagenic aromatic and heteroaromatic nitro compounds. Correlation with molecular orbital energies and hydrophobicity.Crossref | GoogleScholarGoogle Scholar |

[47]  RLL De Compadre, AJ Shusterman, C Hansch, The Role of Hydrophobicity in the Ames Test. The Correlation of the Mutagenicity of Nitropolycyclic Hydrocarbons with Partition Coefficients and Molecular Orbital Indices. Int J Quantum Chem 1988, 34, 91.
         | The Role of Hydrophobicity in the Ames Test. The Correlation of the Mutagenicity of Nitropolycyclic Hydrocarbons with Partition Coefficients and Molecular Orbital Indices.Crossref | GoogleScholarGoogle Scholar |

[48]  AJ Leo, C Hansch, Role of hydrophobic effects in mechanistic QSAR. Perspect Drug Discovery Des 1999, 17, 1.
         | Role of hydrophobic effects in mechanistic QSAR.Crossref | GoogleScholarGoogle Scholar |

[49]  AK Ghose, A Pritchett, GM Crippen, Atomic Physicochemical Parameters for Three-Dimensional Structure Directed Quantitative Structure–Activity Relationships III: Modeling Hydrophobic Interactions. J Comput Chem 1988, 9, 80.
         | Atomic Physicochemical Parameters for Three-Dimensional Structure Directed Quantitative Structure–Activity Relationships III: Modeling Hydrophobic Interactions.Crossref | GoogleScholarGoogle Scholar |

[50]  LE Andrews, TM Banks, AM Bonin, SF Clay, A-ME Gillson, SA Glover, Mutagenic N-acyloxy-N-alkoxyamides: Probes for Drug–DNA Interactions. Aust J Chem 2004, 57, 377.
         | Mutagenic N-acyloxy-N-alkoxyamides: Probes for Drug–DNA Interactions.Crossref | GoogleScholarGoogle Scholar |

[51]  Hansch C, Leo AJ, Hoekman D. Exploring QSAR, Fundamentals and Applications in Chemistry and Biology, Part II. Washington, DC: American Chemical Society; 1995.

[52]  SA Glover, RR Schumacher, The effect of hydrophobicity upon the direct mutagenicity of N-acyloxy-N-alkoxyamides – Bilinear dependence upon LogP. Mutat Res Genet Toxicol Environ Mutagen 2016, 795, 41.
         | The effect of hydrophobicity upon the direct mutagenicity of N-acyloxy-N-alkoxyamides – Bilinear dependence upon LogP.Crossref | GoogleScholarGoogle Scholar |

[53]  K Tuppurainen, Frontier orbital energies, hydrophobicity and steric factors as physical QSAR descriptors of molecular mutagenicity. A review with a case study: MX compounds. Chemosphere 1999, 38, 3015.
         | Frontier orbital energies, hydrophobicity and steric factors as physical QSAR descriptors of molecular mutagenicity. A review with a case study: MX compounds.Crossref | GoogleScholarGoogle Scholar |

[54]  BN Ames, FD Lee, WE Durston, An Improved Bacterial Test System for the Detection and Classification of Mutagens and Carcinogens. Proc Natl Acad Sci U S A 1973, 70, 782.
         | An Improved Bacterial Test System for the Detection and Classification of Mutagens and Carcinogens.Crossref | GoogleScholarGoogle Scholar |

[55]  CA Lipinski, F Lombardo, BW Dominy, PJ Feeney, Experimental and computational approaches to estimate solubility and permeability in drug discovery and development settings. Adv Drug Delivery Rev 2001, 46, 3.
         | Experimental and computational approaches to estimate solubility and permeability in drug discovery and development settings.Crossref | GoogleScholarGoogle Scholar |

[56]  H Kubinyi, Quantitative structure–activity relations. 7. The bilinear model, a new model for non-linear dependence of biological activity on hydrophobic character. J Med Chem 1977, 20, 625.
         | Quantitative structure–activity relations. 7. The bilinear model, a new model for non-linear dependence of biological activity on hydrophobic character.Crossref | GoogleScholarGoogle Scholar |

[57]  Kubinyi H. Lipophilicity and drug activity. In Jucker E, editor. Progress in Drug Research. Vol. 23. Birkhäuser Basel; 1979. pp. 97–198.
| Crossref |

[58]  H Kubinyi, OH Kehrhahn, Quantitative Structure–Activity relationships. VI. Non-linear dependence of biological activity on hydrophobic character: Calculation procedures for bilinear model. Arzneimittel-Forschung 1978, 28, 598.

[59]  LE Andrews, AM Bonin, LE Fransson, A-ME Gillson, SA Glover, The Role of Steric Effects in the Direct Mutagenicity of N-Acyloxy-N-alkoxyamides. Mutat Res Genet Toxicol Environ Mutagen 2006, 605, 51.
         | The Role of Steric Effects in the Direct Mutagenicity of N-Acyloxy-N-alkoxyamides.Crossref | GoogleScholarGoogle Scholar |

[60]  De Kimpe N, Verhé R. Synthesis and reactivity of α-halogenated ketones. In Patai S, Rappoport Z, editors. α-Haloketones, α-Haloaldehydes and α-Haloimines. John Wiley & Sons, Inc; 1988. pp. 1–119.

[61]  SA Glover, RR Schumacher, AM Bonin, LE Fransson, Steric effects on the direct mutagenicity of N-acyloxy-N-alkoxyamides – probes for drug–DNA interactions. Mutat Res Genet Toxicol Environ Mutagen 2011, 722, 32.
         | Steric effects on the direct mutagenicity of N-acyloxy-N-alkoxyamides – probes for drug–DNA interactions.Crossref | GoogleScholarGoogle Scholar |

[62]  Neidle S. Principles of Small Molecule-DNA Recognition. New York: Academic Press; 2008. pp. 132–203.

[63]  Blackburn GM, Gait MJ, Loakes D, Williams DM. Nucleic Acids in Chemistry and Biology. Cambridge: RSC Publishing; 2006.

[64]  DE Graves, LM Velea, Intercalative Binding of Small Molecules to Nucleic Acids. Curr Org Chem 2000, 4, 915.
         | Intercalative Binding of Small Molecules to Nucleic Acids.Crossref | GoogleScholarGoogle Scholar |

[65]  U Pindur, M Haber, K Sattler, Antitumor Active Drugs as Intercalators of Deoxyribonucleic Acid. J Chem Educ 1993, 70, 263.
         | Antitumor Active Drugs as Intercalators of Deoxyribonucleic Acid.Crossref | GoogleScholarGoogle Scholar |

[66]  X Qian, T-B Huang, D-z Wei, D-H Zhu, Zhu, W Yao, Interaction of naphthyl heterocycles with DNA: effects of thiono and thio groups. J Chem Soc, Perkin Trans 2 2000, 715.
         | Interaction of naphthyl heterocycles with DNA: effects of thiono and thio groups.Crossref | GoogleScholarGoogle Scholar |

[67]  J Sartorius, H-J Schneider, Intercalation mechanisms with ds-DNA: binding modes and energy contributions with benzene, naphthalene, quinoline and indole derivatives including some antimalarials. J Chem Soc, Perkin Trans 2 1997, 2319.
         | Intercalation mechanisms with ds-DNA: binding modes and energy contributions with benzene, naphthalene, quinoline and indole derivatives including some antimalarials.Crossref | GoogleScholarGoogle Scholar |

[68]  KA Stevenson, SF Yen, NC Yang, DW Boykin, WD Wilson, A substituent constant analysis of the interaction of substituted naphthalene monoimides with DNA. J Med Chem 1984, 27, 1677.
         | A substituent constant analysis of the interaction of substituted naphthalene monoimides with DNA.Crossref | GoogleScholarGoogle Scholar |

[69]  Y Chu, DW Hoffman, BL Iverson, A Pseudocatenane Structure Formed between DNA and a Cyclic Bisintercalator. J Am Chem Soc 2009, 131, 3499.
         | A Pseudocatenane Structure Formed between DNA and a Cyclic Bisintercalator.Crossref | GoogleScholarGoogle Scholar |

[70]  SF Yen, EJ Gabbay, WD Wilson, Interaction of aromatic imides with DNA. 1. Spectrophotometric and viscometric studies. Biochemistry 1982, 21, 2070.
         | Interaction of aromatic imides with DNA. 1. Spectrophotometric and viscometric studies.Crossref | GoogleScholarGoogle Scholar |

[71]  Wilson WD. Comprehensive Natural Product Chemistry. Oxford: Pergamon; 1999. pp. 427–476.

[72]  JB Chaires, Energetics of drug-DNA interactions. Biopolymers 1997, 44, 201.
         | Energetics of drug-DNA interactions.Crossref | GoogleScholarGoogle Scholar |

[73]  LS Lerman, The Structure of the DNA–Acridine Complex. Proc Natl Acad Sci U S A 1963, 49, 94.
         | The Structure of the DNA–Acridine Complex.Crossref | GoogleScholarGoogle Scholar |

[74]  LS Lerman, Structural considerations in the interaction of DNA and acridines. J Mol Biol 1961, 3, 18.
         | Structural considerations in the interaction of DNA and acridines.Crossref | GoogleScholarGoogle Scholar |

[75]  Neidle S. Nucleic Acid Structure and Recognition. Oxford: Oxford University Press; 2002.

[76]  BN Ames, EG Gurney, JA Miller, H Bartsch, Carcinogens as Frameshift Mutagens: Metabolites and Derivatives of 2-Acetylaminofluorene and Other Aromatic Amine Carcinogens. Proc Natl Acad Sci U S A 1972, 69, 3128.
         | Carcinogens as Frameshift Mutagens: Metabolites and Derivatives of 2-Acetylaminofluorene and Other Aromatic Amine Carcinogens.Crossref | GoogleScholarGoogle Scholar |

[77]  K Isono, J Yourno, Chemical Carcinogens as Frameshift Mutagens: Salmonella DNA Sequence Sensitive to Mutagenesis by Polycyclic Carcinogens. Proc Natl Acad Sci U S A 1974, 71, 1612.
         | Chemical Carcinogens as Frameshift Mutagens: Salmonella DNA Sequence Sensitive to Mutagenesis by Polycyclic Carcinogens.Crossref | GoogleScholarGoogle Scholar |

[78]  BN Ames, WE Durston, E Yamasaki, FD Lee, Carcinogens are Mutagens: A Simple Test System Combining Liver Homogenates for Activation and Bacteria for Detection. Proc Natl Acad Sci U S A 1973, 70, 2281.
         | Carcinogens are Mutagens: A Simple Test System Combining Liver Homogenates for Activation and Bacteria for Detection.Crossref | GoogleScholarGoogle Scholar |

[79]  HJ Creech, RK Preston, RM Peck, AP O’Connell, BN Ames, Antitumor and mutagenic properties of a variety of heterocyclic nitrogen and sulfur mustards. J Med Chem 1972, 15, 739.
         | Antitumor and mutagenic properties of a variety of heterocyclic nitrogen and sulfur mustards.Crossref | GoogleScholarGoogle Scholar |

[80]  SA Glover, RR Schumacher, Mutagenicity of N-acyloxy-N-alkoxyamides as an indicator of DNA intercalation: The role of fluorene and fluorenone substituents as DNA intercalators. Mutat Res Genet Toxicol Environ Mutagen 2021, 863–864, 503299.
         | Mutagenicity of N-acyloxy-N-alkoxyamides as an indicator of DNA intercalation: The role of fluorene and fluorenone substituents as DNA intercalators.Crossref | GoogleScholarGoogle Scholar |

[81]  Schumacher RR. Structural Effects upon the Mutagenicity of N-acyloxy-N-alkoxyamides. PhD thesis, University of New England, Armidale; 2011.

[82]  IS Zegar, AS Prakash, RG Harvey, PR LeBreton, Stereoelectronic aspects of the intercalative binding properties of 7,12-dimethylbenz[a]anthracene metabolites with DNA. J Am Chem Soc 1985, 107, 7990.
         | Stereoelectronic aspects of the intercalative binding properties of 7,12-dimethylbenz[a]anthracene metabolites with DNA.Crossref | GoogleScholarGoogle Scholar |

[83]  H Zang, KS Gates, DNA Binding and Alkylation by the ‘Left Half’ of Azinomycin B. Biochemistry 2000, 39, 14968.
         | DNA Binding and Alkylation by the ‘Left Half’ of Azinomycin B.Crossref | GoogleScholarGoogle Scholar |

[84]  S Alcaro, RS Coleman, A Molecular Model for DNA Cross-Linking by the Antitumor Agent Azinomycin B. J Med Chem 2000, 43, 2783.
         | A Molecular Model for DNA Cross-Linking by the Antitumor Agent Azinomycin B.Crossref | GoogleScholarGoogle Scholar |

[85]  S Alcaro, F Ortuso, RS Coleman, DNA Cross-Linking by Azinomycin B: Monte Carlo Simulations in the Evaluation of Sequence Selectivity. J Med Chem 2002, 45, 861.
         | DNA Cross-Linking by Azinomycin B: Monte Carlo Simulations in the Evaluation of Sequence Selectivity.Crossref | GoogleScholarGoogle Scholar |

[86]  RS Coleman, RJ Perez, CH Burk, A Navarro, Studies on the Mechanism of Action of Azinomycin B: Definition of Regioselectivity and Sequence Selectivity of DNA Cross-Link Formation and Clarification of the Role of the Naphthoate. J Am Chem Soc 2002, 124, 13008.
         | Studies on the Mechanism of Action of Azinomycin B: Definition of Regioselectivity and Sequence Selectivity of DNA Cross-Link Formation and Clarification of the Role of the Naphthoate.Crossref | GoogleScholarGoogle Scholar |

[87]  RS Coleman, MT Tierney, SB Cortright, DJ Carper, Synthesis of Functional ‘Top-Half’ Partial Structures of Azinomycin A and B. J Org Chem 2007, 72, 7726.
         | Synthesis of Functional ‘Top-Half’ Partial Structures of Azinomycin A and B.Crossref | GoogleScholarGoogle Scholar |

[88]  MA Casely-Hayford, K Pors, CH James, LH Patterson, JA Hartley, M Searcey, Design and synthesis of a DNA-crosslinking azinomycin analogue. Org Biomol Chem 2005, 3, 3585.
         | Design and synthesis of a DNA-crosslinking azinomycin analogue.Crossref | GoogleScholarGoogle Scholar |

[89]  KW Bair, RL Tuttle, VC Knick, M Cory, DD McKee, [(1-Pyrenylmethyl)amino]alcohols, a new class of antitumor DNA intercalators. Discovery and initial amine side chain structure–activity studies. J Med Chem 1990, 33, 2385.
         | [(1-Pyrenylmethyl)amino]alcohols, a new class of antitumor DNA intercalators. Discovery and initial amine side chain structure–activity studies.Crossref | GoogleScholarGoogle Scholar |

[90]  F Secco, M Venturini, T Biver, F Sánchez, R Prado-Gotor, E Grueso, Solvent Effects on the Kinetics of the Interaction of 1-Pyrenecarboxaldehyde with Calf Thymus DNA. J Phys Chem B 2010, 114, 4686.
         | Solvent Effects on the Kinetics of the Interaction of 1-Pyrenecarboxaldehyde with Calf Thymus DNA.Crossref | GoogleScholarGoogle Scholar |

[91]  S Laib, A Krieg, P Häfliger, N Agorastos, DNA-intercalation on pyrene modified surface coatings. Chem Commun 2005, 5566.
         | DNA-intercalation on pyrene modified surface coatings.Crossref | GoogleScholarGoogle Scholar |

[92]  M Nakamura, Y Fukunaga, K Sasa, Y Ohtoshi, K Kanaori, H Hayashi, H Nakano, K Yamana, Pyrene is highly emissive when attached to the RNA duplex but not to the DNA duplex: the structural basis of this difference. Nucleic Acids Res 2005, 33, 5887.
         | Pyrene is highly emissive when attached to the RNA duplex but not to the DNA duplex: the structural basis of this difference.Crossref | GoogleScholarGoogle Scholar |

[93]  U Förster, C Grünewald, JW Engels, J Wachtveitl, Ultrafast Dynamics of 1-Ethynylpyrene-Modified RNA: A Photophysical Probe of Intercalation. J Phys Chem B 2010, 114, 11638.
         | Ultrafast Dynamics of 1-Ethynylpyrene-Modified RNA: A Photophysical Probe of Intercalation.Crossref | GoogleScholarGoogle Scholar |

[94]  F-M Chen, Binding of pyrene to DNA, base squence specificity and its implication. Nucleic Acids Res 1983, 11, 7231.
         | Binding of pyrene to DNA, base squence specificity and its implication.Crossref | GoogleScholarGoogle Scholar |

[95]  H-C Becker, B Nordén, DNA Binding Mode and Sequence Specificity of Piperazinylcarbonyloxyethyl Derivatives of Anthracene and Pyrene. J Am Chem Soc 1999, 121, 11947.
         | DNA Binding Mode and Sequence Specificity of Piperazinylcarbonyloxyethyl Derivatives of Anthracene and Pyrene.Crossref | GoogleScholarGoogle Scholar |

[96]  Z Jiang, Y Zhang, Y Yu, Z Wang, X Zhang, X Duan, S Wang, Study on Intercalations between Double-Stranded DNA and Pyrene by Single-Molecule Force Spectroscopy: Toward the Detection of Mismatch in DNA. Langmuir 2010, 26, 13773.
         | Study on Intercalations between Double-Stranded DNA and Pyrene by Single-Molecule Force Spectroscopy: Toward the Detection of Mismatch in DNA.Crossref | GoogleScholarGoogle Scholar |

[97]  AK Debnath, RL Lopez Compadre, AJ Shusterman, C Hansch, Quantitative Structure–Activity Relationship Investigation of the Role of Hydrophobicity in Regulating Mutagenicity in the Ames Test: 2. Mutagenicity of Aromatic and Heteroaromatic Nitro Compounds in Salmonella typhimurium TA100. Env Mol Mutagen 1992, 19, 53.
         | Quantitative Structure–Activity Relationship Investigation of the Role of Hydrophobicity in Regulating Mutagenicity in the Ames Test: 2. Mutagenicity of Aromatic and Heteroaromatic Nitro Compounds in Salmonella typhimurium TA100.Crossref | GoogleScholarGoogle Scholar |

[98]  M Klein, U Voigtmann, T Haack, L Erdinger, G Boche, From mutagenic to non-mutagenic nitroarenes: effect of bulky alkyl substituents on the mutagenic activity of 4-nitrobiphenyl in Salmonella typhimurium: Part I. Substituents ortho to the nitro group and in 2′-position. Mutat Res Genet Toxicol Environ Mutagen 2000, 467, 55.
         | From mutagenic to non-mutagenic nitroarenes: effect of bulky alkyl substituents on the mutagenic activity of 4-nitrobiphenyl in Salmonella typhimurium: Part I. Substituents ortho to the nitro group and in 2′-position.Crossref | GoogleScholarGoogle Scholar |

[99]  M Klein, L Erdinger, G Boche, From mutagenic to non-mutagenic nitroarenes: effect of bulky alkyl substituents on the mutagenic activity of nitroaromatics in Salmonella typhimurium: Part II. Substituents far away from the nitro group. Mutat Res Genet Toxicol Environ Mutagen 2000, 467, 69.
         | From mutagenic to non-mutagenic nitroarenes: effect of bulky alkyl substituents on the mutagenic activity of nitroaromatics in Salmonella typhimurium: Part II. Substituents far away from the nitro group.Crossref | GoogleScholarGoogle Scholar |

[100]  SH Kennedy, BD Dherange, KJ Berger, MD Levin, Skeletal editing through direct nitrogen deletion of secondary amines. Nature 2021, 593, 223.
         | Skeletal editing through direct nitrogen deletion of secondary amines.Crossref | GoogleScholarGoogle Scholar |

[101]  KJ Berger, JL Driscoll, M Yuan, BD Dherange, O Gutierrez, MD Levin, Direct Deamination of Primary Amines via Isodiazene Intermediates. J Am Chem Soc 2021, 143, 17366.
         | Direct Deamination of Primary Amines via Isodiazene Intermediates.Crossref | GoogleScholarGoogle Scholar |

[102]  SA Glover, A Rauk, JM Buccigross, JJ Campbell, GP Hammond, G Mo, LE Andrews, A-ME Gillson, The HERON reaction – Origin, Theoretical Background, and Prevalence. Can J Chem 2005, 83, 1492.
         | The HERON reaction – Origin, Theoretical Background, and Prevalence.Crossref | GoogleScholarGoogle Scholar |

[103]  SA Glover, G Mo, A Rauk, HERON rearrangement of N,N’-diacyl-N,N’-dialkoxyhydrazines – a theoretical and experimental study. Tetrahedron 1999, 55, 3413.
         | HERON rearrangement of N,N’-diacyl-N,N’-dialkoxyhydrazines – a theoretical and experimental study.Crossref | GoogleScholarGoogle Scholar |

[104]  JM Buccigross, SA Glover, Molecular orbital studies of novel N to C migrations in N,N-bisheteroatom-substituted amides—HERON rearrangements. J Chem Soc, Perkin Trans 2 1995, 595.
         | Molecular orbital studies of novel N to C migrations in N,N-bisheteroatom-substituted amides—HERON rearrangements.Crossref | GoogleScholarGoogle Scholar |

[105]  Glover SA. HERON Rearrangement (Heteroatom Rearrangements on Nitrogen). In O’Neil MJ, editor. Merck Index, Organic Name Reactions ONR-48, 13 edn. Whitehouse Station, N.J.: Merck & Co., Inc.; 2001.

[106]  WP Unsworth, A-J Avestro, Nitrogen deletion offers fresh strategy for organic synthesis. Nature 2021, 593, 203.
         | Nitrogen deletion offers fresh strategy for organic synthesis.Crossref | GoogleScholarGoogle Scholar |

[107]  C Zippel, J Seibert, S Bräse, Skeletal Editing—Nitrogen Deletion of Secondary Amines by Anomeric Amide Reagents. Angew Chem Int Ed 2021, 60, 19522.
         | Skeletal Editing—Nitrogen Deletion of Secondary Amines by Anomeric Amide Reagents.Crossref | GoogleScholarGoogle Scholar |

[108]  Dherange BD, Yuan M, Kelly CB, Reiher CA, Grosanu C, Berger KJ, Gutierrez O, Levin MD. Direct deaminative functionalization. J Am Chem Soc 2023; 145: 17–24.
| Crossref |, S2 of Supporting Information

[109]  Kamber M, Flückiger-Isler S, Engelhardt G, Jaeckh R and Zeiger E. Comparison of the Ames II and traditional Ames test responses with respect to mutagenicity, strain specificities, need for metabolism and correlation with rodent carcinogenicity. Mutagenesis 2009; 24: 359–366.
| Crossref |