Treatment of 2-alkynylphenol with an alkyl Grignard reagent in the presence of a catalytic amount of manganese(II) chloride provided 2-(2-alkyl-1-alkenyl)phenol in good yield. Alkylmagnesation proceeded with high regio- and stereoselectivities.
Carbon-carbon bond formation by the reaction of organolithiums with α-lithiated cyclic enol ethers. Stereoselective synthesis of β- and γ-hydroxy di- and tri-substituted alkenes
作者:Thinh Nguyen、Ei-ichi Negishi
DOI:10.1016/s0040-4039(00)79422-6
日期:1991.10
α-Lithiation of dihydrofuran, benzofuran, and dihydropyran followed by treatment with various organolithiums stereoselectively produces in good yields the corresponding ring-opened (E)-alkenyllithiums, i.e., (E)-β(or γ)-hydroxy-ω-alkenyl-ω-lithioalkenes, the lithium atom of which can be readily replaced with H, D, or C groups, such as CO2 and Me.