Copper(I)-Catalyzed Oxidative Coupling between 2‑Aminobenzothiazole and Terminal Alkyne: Formation of Benzothiazine
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An unprecedented formation of benzothiazine during copper(I)-catalyzed oxidative coupling of 2-aminobenzothiazole and terminal alkyne in air has been observed. This unique transformation possibly occurs through the ring opening of 2-aminobenzothiazole and subsequent oxidative coupling with alkyne followed by intramolecular cyclization. A variety of substituted benzo[b][1,4]thiazine-4-carbonitriles are obtained by this protocol.
创建时间：
2016-02-16
