Bi(NO3)3–Al2O3-Mediated Efficient Synthesis of 4-Aryl-2,6-dicoumarinylpyridines Under Solventless Conditions

Anil K. Verma; Summon Koul; Kamal K. Kapoor; Tej K. Razdan

doi:10.1071/CH07206

RESEARCH ARTICLE

Previous Contents Vol 60(11)

Bi(NO₃)₃–Al₂O₃-Mediated Efficient Synthesis of 4-Aryl-2,6-dicoumarinylpyridines Under Solventless Conditions

Anil K. Verma ^A , Summon Koul ^A ^B , Kamal K. Kapoor ^A and Tej K. Razdan ^A ^C

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, University of Jammu, Ambedkar Road, Jammu-180 006, India.

^B Present address: Department of Chemistry, British Columbia University, Canada.

^C Corresponding author. Email: tk_razdan@rediffmail.com

Australian Journal of Chemistry 60(11) 883-888 https://doi.org/10.1071/CH07206
Submitted: 16 June 2007 Accepted: 7 September 2007 Published: 1 November 2007

Abstract

A new efficient and eco-friendly methodology has been developed for the synthesis of 4-aryl-2,6-dicoumarinylpyridines from coumarinylchalcones and urea, using Bi(iii) nitrate–Al₂O₃ as catalyst. Coumarinylchalcones were in turn prepared from salicylaldehyde and ethylacetoacetate by the tandem reaction with aldehydes on the surface of Bi(iii) nitrate–Al₂O₃ in the presence of the co-catalyst Zn(ii) chloride.

Acknowledgements

The authors are thankful to Dr R. G. Bhat, I.I.Sc. Bangalore, India, and Dr S. K. Date, National Chemical Laboratory, Pune, for spectral analysis.

References

Bi(NO3)3–Al2O3-Mediated Efficient Synthesis of 4-Aryl-2,6-dicoumarinylpyridines Under Solventless Conditions

Abstract

Acknowledgements

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Bi(NO₃)₃–Al₂O₃-Mediated Efficient Synthesis of 4-Aryl-2,6-dicoumarinylpyridines Under Solventless Conditions