Photochemical Transformations of 2, 4, 4, 6-Tetraphenyl-4H-thiopyran-1, 1-dioxide and Some Its para-Substituted Derivatives

P Šebek, P Sedmera, J Kuthan

Index: Sebek, Pavel; Sedmera, Petr; Kuthan, Josef Collection of Czechoslovak Chemical Communications, 1993 ,  vol. 58,  # 4  p. 869 - 881

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Citation Number: 9

Abstract

Abstract 1, 2, 4, 5-Tetrasubstituted cyclopentadienes VIa-VIf or phenanthrene derivative VIII, respectively, were obtained as the main photoproducts upon irradiation of sulfones Ia-If and II in acetonitrile, methanol or benzene. Bridged isomers Va-Vd were isolated from the reaction of Ia-Id carried out in acetonitrile. Probable course of the investigated photochemical transformations of 4H-thiopyran-1, 1-dioxides is discussed.