Woods PA, Morrill LC, Lebl T, Slawin AMZ, Bragg RA, Smith AD. Isothiourea-mediated stereoselective C-acylation of silyl ketene acetals.
Org Lett 2010;
12:2660-3. [PMID:
20459078 DOI:
10.1021/ol1008747]
[Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Isothiourea DHPB promotes the diastereoselective C-acylation of silyl ketene acetals with anhydrides or benzoyl fluoride, giving 3-acyl-3-aryl or 3-acyl-3-alkylfuranones in excellent yields and stereoselectivities (up to 99:1 dr).
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