Liu H, Cai C, Ding Y, Chen J, Liu B, Xia Y. Cobalt-Catalyzed
E-Selective Isomerization of Alkenes with a Phosphine-Amido-Oxazoline Ligand.
ACS OMEGA 2020;
5:11655-11670. [PMID:
32478256 PMCID:
PMC7254813 DOI:
10.1021/acsomega.0c00951]
[Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
An efficient method to access (E)-trisubstituted alkenes is reported via cobalt-catalyzed isomerization of 1,1-disubstituted alkenes using a phosphine-amido-oxazoline ligand. The reaction could also convert mono- and 1,2-disubstituted alkenes to (E)-internal alkenes with benzylic selectivity. This protocol is atom-economy and operationally simple and uses readily available starting materials with good functional tolerance. This catalytic system could be scaled up to gram scale smoothly with a catalyst loading of 0.1 mol %.
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