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Synthesis 2013; 45(3): 365-369
DOI: 10.1055/s-0032-1316834
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© Georg Thieme Verlag Stuttgart · New York

Efficient Synthesis of 5H-Indazolo[3,2-b]-1,3,4-benzotriazepines by a Tandem Aza-Wittig Cyclization

Fen-Fen Zhao
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, P. R. of China   Fax: +86(27)67862041   Email: mwding@mail.ccnu.edu.cn
,
Hao Zhang
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, P. R. of China   Fax: +86(27)67862041   Email: mwding@mail.ccnu.edu.cn
,
Ming-Wu Ding*
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan 430079, P. R. of China   Fax: +86(27)67862041   Email: mwding@mail.ccnu.edu.cn
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Publication History

Received: 01 November 2012

Accepted after revision: 03 December 2012

Publication Date:
17 December 2012 (online)

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Abstract

5H-Indazolo[3,2-b]-1,3,4-benzotriazepines were directly prepared by the reaction of azides with triphenylphosphine via a tandem aza-Wittig cyclization in good yields.

Key words

5H-indazolo[3,2-b]-1,3,4-benzotriazepine - aza-Wittig reaction - tandem reaction - iminophosphorane - azide

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