Irradiation of the alkylidenecyclobutanethiones (I) in benzene results in isomerization, yielding the rearranged products (II), whereas in methanol (III), the cyclic O,S‐acetals (IV) and (V) are additionally formed.
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ChemInform Abstract: Photochemical, Photophysical, and Theoretical Studies on Cyclobutanethiones: α‐Cleavage Reactions