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An Efficient Synthesis of [1, 2, 4]Triazolo[3, 2=d][1, 5]benzoxazepin-2-thiones, a Kind of Novel Tricyclic O, N-Heterocycles

✍ Scribed by Zheng Li; Qing-Qing Meng; Quan-Rui Wang; Feng-Gang Tao

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 563 KB
Volume: 22
Category: Article
ISSN: 0256-7660
DOI: 10.1002/cjoc.20040220316

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✦ Synopsis

Abstract

A series of novel tricyclic O, N‐heterocycles, [1, 2, 4]triazolo[3.2‐d][1, 5]benzoxazepin‐2‐thiones 7 were achieved via acid‐induced ring closure of the geminal arylazo isothiocyanate compounds 5 which were derived from substituted chroman‐4‐ones. followed by feasible ring expansion with simultaneous insertion of the nitrogen atom into the carbon skeleton. The X‐ray crystal structure of 7d was also described.

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