Organic & Biomolecular Chemistry Copper-catalyzed ring expansion of 2-amino-benzothiazoles with alkynyl carboxylic acids to 1,4-benzothiazines
摘要：
A new ring expansion of 2-aminobenzothiazoles with alkynyl carboxylic acids was developed, which allows for one-pot synthesis of 1,4-benzothiazines in moderate to excellent yields. The cascade reaction was achieved through decarboxylative coupling, nucleophilic ring-opening reaction and intramolecular hydroamination process.
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DOI：
10.1039/C4OB02467B
年份：
2015
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