Journal
ORGANIC LETTERS
Volume 16, Issue 21, Pages 5652-5655Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol502729c
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- CSIR, New Delhi [02(0168)/13/EMR-II]
- UGC
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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.
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