Photochemical reduction of 2,3-dihydro-2,3-methano-1,4-naphthoquinones with xanthene.

TLDR: In this paper, the stereochemical isomers of the 1,2-adducts of xanthene to carbonyl groups were isolated as the reaction products CIDNP technique was applied for the examination of the course of the reactions.

Abstract: Photochemical reduction of 2,3-dihydro-2-methyl-2,3-methano-1,4-naphthoquinone (1a) and 2,3-dihydro-2,3-dimethyl-2,3-methano-1,4-naphthoquinone (1b) with xanthene was investigated 6,7,8,9-Tetrahydrobenzocycloheptene-5,9-dione derivatives and stereochemical isomers of the so-called “1,2-adducts” of xanthene to carbonyl groups were isolated as the reaction products CIDNP technique was applied for the examination of the course of the reactions