Ichikawa J, Fujiwara M, Miyazaki S, Ikemoto M, Okauchi T, Minami T. Regioselective nucleophilic additions to cross-conjugated dienone system bearing beta-fluorine: a versatile approach to highly substituted 2-cyclopentenones.
Org Lett 2001;
3:2345-8. [PMID:
11463312 DOI:
10.1021/ol0161458]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] 3-Fluoro-5-methylene-2-cyclopentenone is treated with appropriate nucleophiles and Lewis acids to undergo regioselective 1,2-addition, exocyclic 1,4-addition, and endocyclic 1,4-addition, leading to 3-substituted 4-methylene-2-cyclopentenones, 5-substituted 3-fluoro-2-cyclopentenones, and 3-substituted 5-methylene-2-cyclopentenones in good yields, respectively.
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