Volume 15, Issue 3 pp. 246-250
Research Article
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New method for the preparation of dibenzo[b, f][1,4]thiazepines

Takayoshi Fujii

Takayoshi Fujii

Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University, Gofuku, Toyama 930–8555, Japan

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Wei Hao

Wei Hao

Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University, Gofuku, Toyama 930–8555, Japan

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Toshiaki Yoshimura

Corresponding Author

Toshiaki Yoshimura

Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University, Gofuku, Toyama 930–8555, Japan

Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University, Gofuku, Toyama 930–8555, JapanSearch for more papers by this author
First published: 15 April 2004
Citations: 13

Abstract

The S-amination of 9H-thioxanthen-9-ol (2a) and 9-substituted derivatives 2be (Me (b), Et (c), iPr (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 2ac and 2e the reaction led instead to dibenzo[b,f][1,4]thiazepines 6ac and 6e in moderate yields. © 2004 Wiley Periodicals, Inc. Heteroatom Chem 15:246–250, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20010

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