Photochemistry of 4-diphenylmethylene-2,6-bis(methylthio)-3,5-diphenyl-4H-thiopyran. A methylene analogue of a 4H-thiopyran-4-one
Abstract
U.v. irradiation of 4-diphenylmethylene-2,6-bis-(methylthio)-3,5-diphenyl-4H-thiopyran affords 2-diphenylmethylene-4,5-bis(methylthio)-3,6-diphenyl-2H-thiopyran via the π,π* triplet state of the former.