Heteroatom Chemistry

New method for the preparation of dibenzo [b, f][1, 4] thiazepines

T Fujii, W Hao, T Yoshimura

Index: Fujii, Takayoshi; Hao, Wei; Yoshimura, Toshiaki Heteroatom Chemistry, 2004 , vol. 15, # 3 p. 246 - 250

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Citation Number: 5

Abstract

Abstract The S-amination of 9H-thioxanthen-9-ol (2a) and 9-substituted derivatives 2b–e (Me (b), Et (c), i Pr (d), Ph (e)) with O-mesitylenesulfonylhydroxylamine (MSH) was carried out. The expected product, 10-amino-9-hydroxy-9-isopropyl-9H-thioxanthenium mesitylenesulfonate (3d), was obtained in 78 (%) yield from the corresponding thioxanthen (9)-ol 2d. However, in the case of 2a–c and 2e the reaction led instead to dibenzo [b, f][1, 4 ...