Schmitt DC, Taylor AP, Flick AC, Kyne RE. Synthesis of pyrazoles from 1,3-diols via hydrogen transfer catalysis.
Org Lett 2015;
17:1405-8. [PMID:
25719568 DOI:
10.1021/acs.orglett.5b00266]
[Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
1,3-Diols engage in ruthenium-catalyzed hydrogen transfer in the presence of alkyl hydrazines to provide 1,4-disubstituted pyrazoles. Regioselective synthesis of unsymmetrical pyrazoles from β-hydroxy ketones is also described.
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