
TY  - JOUR
A1  - Krajniak, ER 
A1  - Ritchie, E 
A1  - Taylor, WC 
T1  - Experiments on the synthesis of some coumarin derivatives
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1973
VL  - 26
IS  - 4
SP  - 899
EP  - 906
KW  - 
UR  - https://doi.org/10.1071/CH9730899 
N2  - Evidence has been obtained that the reaction between a phenol and maleic or fumaric acid in the presence of sulphuric acid to yield a coumarin derivative, the Ponndorf reaction, is a variant of the Pechmann reaction. The scopes of the two reactions appear to be similar.     Attempts to effect the oxidative cyclization of hydroxyaryl cinnamates to 4-arylcoumarins, a key step in Seshadri's scheme for the biogenesis of neoflavanoids, were unsuccessful. 4-Aryl-3,4- dihydrocoumarins, which are readily available, are smoothly converted into 4-arylcoumarins by iodine and potassium acetate in acetic acid. 
ER  -

