The organocuprates derived from reaction of Grignard reagents with CuBr·Me2S react with 5-lithio-2,3-dihydrofuran and 6-lithio-3,4-dihydro-2H-pyran via a 1,2-metallate rearrangement to generate an alkenylmagnesium cuprate.
Intramolecular 4 + 3 Cycloadditions. Theoretical and Experimental Evaluation of Endo/Exo Preferences of a Cyclopentenyl Cation
作者:Christopher J. Cramer、Michael Harmata、Paitoon Rashatasakhon
DOI:10.1021/jo015695g
日期:2001.8.1
A stereoselective synthesis of functionalized alkenyllithiums and alkenyl cyanocuprates by the copper(I)-catalyzed coupling of organolithium reagents with .alpha.-lithiated cyclic enol ethers