Acetylenic ketones. I. Reaction of aroylphenylacetylenes with compounds containing an active methylene group

Abstract

Abstract Aroylphenylacetylenes reacted with ethyl phenylacetate and benzyl cyanide in the presence of sodium ethoxide to give 6‐aryl‐3,4‐diphenyl‐2 H ‐pyran‐2‐ones (2) and 4‐aroyl‐2,3‐ cis ‐diphenyl‐crotonitriles (11) , respectively. The structure and configuration of the products are based on chemical and spectroscopic evidence.