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ChemInform Abstract: Silver-Catalyzed Tandem Ammonolysis—Cyclization of 2-Alkynylbenzenamines with Tetraalkylthiuram Disulfides to 4-Methylene-4H-benzo[d][1,3]thiazin-2-amines.

✍ Scribed by Ri-Yuan Tang; Pei-Song Luo; Xing-Guo Zhang; Ping Zhong; Jin-Heng Li

Publisher: John Wiley and Sons
Year: 2010
Weight: 33 KB
Volume: 41
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.201041165

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✦ Synopsis

Abstract

Disulfides (IIa) and (IIb) afford exclusively the (Z)‐products on reaction with substrate (Ia/Ib).

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## Abstract The title tandem reaction proceeds with high efficiency via Beckmann rearrangement, thioamide formation, and subsequent intramolecular cyclization.