Chemische Berichte

Synthesis and Dynamic Behaviour of [7]??and [8] Metacyclophanes

M Takeshita, A Tsuge, M Tashiro

Index: Takeshita, Michinori; Tsuge, Akihiko; Tashiro, Masashi Chemische Berichte, 1991 , vol. 124, # 2 p. 411 - 413

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Abstract

Abstract The synthesis and structure of [7]-and [8] metacyclophanes 2, 4 are described. The reductive ring opening of the thiophene rings of [2] metacyclo [2](2, 4)-and-(2, 5) thiophenophanes 1 and 3 by Raney-Ni affords the corresponding [7]-and [8] metacyclophanes 2 and 4, respectively. Two types of motion have been observed for the methylene chain of [8] metacyclophane 4c, flipping and pseudorotation.