4.8 Article

Silver-Mediated [3+2] Cycloaddition of Alkynes and N-Isocyanoiminotriphenylphosphorane: Access to Monosubstituted Pyrazoles

Journal

ORGANIC LETTERS
Volume 21, Issue 9, Pages 3158-3161

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.9b00860

Keywords

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Funding

  1. National Natural Science Foundation of China [21871043, 21522202, 21502017, 21604082]
  2. Department of Science and Technology of Jilin Province [20180101185JC, 20190701012GH]

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A silver-mediated [3 + 2] cycloaddition of CNN and C C for constructing pyrazoles has been described. The CNN building block used is N-isocyanoiminotriphenylphosphorane, which is a stable, safe, easy-to-handle, and odorless solid isocyanide. The reaction is characterized by its mild conditions, broad substrate scope, and excellent functional group tolerance.

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