Wu MS, Han ZY, Gong LZ. Asymmetric α-Pentadienylation of Aldehydes with Cyclopropylacetylenes.
Org Lett 2021;
23:636-641. [PMID:
33439666 DOI:
10.1021/acs.orglett.0c03466]
[Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
By employing readily available cyclopropylacetylene and its derivatives as the pentadienylation reagent, an asymmetric regioselective asymmetric α-pentadienylation reaction of aldehydes is developed by cooperative catalysis of a chiral Pd(0) catalyst and a chiral Brønsted acid in the presence of a subschoichmetric amount of an achiral amine. α-Pentadienylated aldehydes are afforded with high yields and enantioselectivities as well as excellent E/Z ratios.
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