Abstract
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.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Carboxylic Acids / chemistry*
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Catalysis
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Copper / chemistry*
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Magnetic Resonance Spectroscopy
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Molecular Structure
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Solvents / chemistry
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Temperature
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Thiazines / chemical synthesis*
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Thiazoles / chemistry*
Substances
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1,4-benzothiazine
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Carboxylic Acids
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Solvents
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Thiazines
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Thiazoles
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Copper