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Paper | Regular issue | Vol 26, No. 1, 1987, pp.121-127
Published online, 1st January, 1970
DOI: 10.3987/R-1987-01-0121
A Convenient Two-step Synthesis of 3-Allylcoumarins and Their Benzoderivatives

Raghao S. Mali, Santosh G. Tilve, Suresh N. Yeola, and Anita R. Manekar

*Department of Chemstry, University of Poona, India

Abstract

A convenient, high yield, two step synthesis of 3-allylcoumarine and their benzo dsriuatives is described fmm 2-hydroxybenzaldehydes. The benzaldehydes (2a-j) on reaction with phosphorane 3 provide E-ethyl-α-allylcinmates (4a-j) in high yields. These esters (4a-j) on themal or photochemiml cyclisation give 3-allylcoumarines (6a-j) .