The photochemistry of a series of β-thioacrylamides has been investigated. The acyclic compounds (9)–(12) undergo cis–trans isomerisation and cyclisation to oxazoles such as (13) and (21). The cyclic β-thioacrylamide (23) undergoes a π2s+π2s cycloaddition reaction to give the interesting tricyclic β-lactam (29).
P. K. Sen, C. J. Veal and D. W. Young, J. Chem. Soc., Perkin Trans. 1, 1981, 3053 DOI: 10.1039/P19810003053
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