3,3-Diphenyl-4-thioxoazetidin-2-ones have been synthesized by photocyclisation of N-diphenylacetylthiocarbamates, and 3-phenyl-4-thioxoazetidinones have been prepared by thionation of azetidine-2,4-diones. Photolysis of the 3,3-diphenyl derivatives in methanol gave 2-methoxythiazolidin-4-ones viaα-cleavage, whereas the 3-phenyl derivatives were photochemically unreactive.
M. Sakamoto, M. Tanaka, A. Fukuda, H. Aoyama and Y. Omote, J. Chem. Soc., Perkin Trans. 1, 1988, 1353 DOI: 10.1039/P19880001353
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