4.7 Article

Copper-mediated pyrazole synthesis from 2,3-allenoates or 2-alkynoates, amines and nitriles

Journal

CHEMICAL COMMUNICATIONS
Volume 50, Issue 57, Pages 7677-7679

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cc02856b

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Funding

  1. National Natural Science Foundation of China [21232006]
  2. National Basic Research Program of China [2011CB808700]

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An efficient copper-mediated three-component reaction of 2,3-allenoates or 2-alkynoates, amines, and nitriles affording fully substituted pyrazoles with a very nice diversity has been developed. A tandem conjugate addition, 1,2-addition, and N-N bond formation mechanism has been proposed for this diverse synthesis of pyrazoles based on mechanistic studies.

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