Cyclopropanation of allylic alcohols using substituted haloalkylzinc reagents: Synthesis of gem-Dimethylcyclopropanes
gem-Dimethylcyclopropanes were obtained by a cyclopropanation of allylic alcohols and ethers using a mixture of diethylzinc and 2,2-diiodopropane in 53-96% yields. Enantioenriched gem-dimethylcyclopropanes were also synthesized using a glucose-derived aux