Abstract
The highly regio- and stereoselective 6-exo-dig mode cyclization of N-acyl-o-alkynylanilines producing 4-alkylidene-3,1-benzoxazines occurred unpredictably by use of a proper catalyst [Pd(OAc)(2)] and an effective additive (acetic acid) under suitable reaction conditions.
MeSH terms
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Alkynes / chemistry*
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Aniline Compounds / chemistry*
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Benzoxazines / chemical synthesis*
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Benzoxazines / chemistry
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Catalysis
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Cyclization
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Molecular Structure
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Palladium / chemistry*
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Stereoisomerism
Substances
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Alkynes
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Aniline Compounds
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Benzoxazines
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Palladium