Aryl alkynoates in the radical synthesis of coumarins

Abstract

[Figure not available: see fulltext.] Radical reactions occupy a significant place in synthetic organic chemistry and significantly complement and expand modern approaches to the synthesis of substituted coumarins. This minireview summarizes various synthetic approaches to the construction of the coumarin system, based on radical cascade reactions starting with aryl alkynoates. The methods considered for constructing the coumarin system include cyclization reactions with the formation of two C–C bonds, as well as one C–C bond and C–P, C–S, C–Se, C–Hal bonds.