4.6 Article

Ligand-Promoted C(sp3)-H Olefination en Route to Multi-functionalized Pyrazoles

Journal

CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 21, Pages 7059-7062

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201600704

Keywords

amino acid ligands; C-H activation; olefination; organic chemistry; pyrazole

Funding

  1. Scripps Research Institute
  2. Vertex Pharmaceuticals, Inc
  3. NIH (NIGMS) [5R01 GM102265]

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A Pd-catalyzed/N-heterocycle-directed C(sp(3))-H olefination has been developed. The monoprotected amino acid ligand (MPAA) is found to significantly promote Pd-catalyzed C(sp(3))-H olefination for the first time. Cu(OAc)(2) instead of Ag+ salts are used as the terminal oxidant. This reaction provides a useful method for the synthesis of alkylated pyrazoles.

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