Journal of Organic Chemistry p. 422 - 426 (1984)
Update date:2022-08-02
Topics:
Goering, Harlan L.
Kantner, Steven S.
Alkylation of 5-methyl-2-cyclohexenyl acetate (1-OAc) with lithium methylcyanocuprate (LiCu(CN)Me) is regiospecific (>90 percent excess γ-alkylation) and sterospecific (>95 percent anti alkylation).In the bicyclo<3.2.1>oct-3-en-2-yl system (3), alkylation is stereoselective (both isomers give exo alkylation) and regiospecific (excess γ-alkylation).Alkylation of trans-α-methyl-γ-mesitylallyl acetate (8-OAc) with LiCu(CN)Me gives 57 percent α- and 43 percent γ-alkylation as compared to >97 percent α-alkylation with LiCuMe2.Mechanistic implications are discussed.
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