Journal
ORGANIC LETTERS
Volume 15, Issue 22, Pages 5726-5729Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol402750r
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- UGC, New Delhi
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Isatins were obtained by cross-dehydrogenative C-N annulation and dealkylative C-N annulation of 2'-N-aryl/alkylaminoacetophenones and 2'-N,N-dialkylaminoacetophenones respectively in the presence of Cu(OAc)(2)center dot H2O/NaOAc/air. However, on reaction with CuBr, 2'-N-benzylaminoacetophenones underwent selective oxidation of an a-methylene group of amine rather than the 2-acetyl group to provide corresponding benzamides exclusively. Base played an important role in selective oxidation by lowering the temperature and time.
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