Author:
Berenjian Nader,Mayo Paul De
Abstract
The irradiation of the pyranthione 1 has been reinvestigated. The reaction proceeds through the (n,π*) triplet and can be quenched with ferrocene. The reaction can be sensitized with Michler's ketone or triphenylene. The elimination of sulfur from two molecules of 1 to give the dipyranylidene 2 requires, surprisingly, a hydrogen donor solvent, and the quantum yield of product has been found to increase with greater dilution, presumably because of the well-known quenching of triplet thiones by the ground state thione. A mechanism for the formation of 2 is suggested.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
13 articles.
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