Light-induced and related reactions of quinones. Part II. Reactions involving chloranil and acetaldehyde

Abstract

Irradiation of chloranil in acetaldehyde with visible light gives a high yield of tetrachloroquinol monoacetate, and a quantitative yield of paraldehyde, the latter probably arising as a consequence of a side-reaction which produces hydrogen chloride. Tetrachloroquinol and 2-methyl-4,4-diphenyldioxolan are major products when the irradiation is carried out in the presence of 1,1-diphenylethylene.