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.
二氢呋喃,苯并呋喃和二氢吡喃的α-锂基化反应,然后用各种有机锂进行立体选择,可以产生高收率的相应开环的(E)-烯基锂,即(E)-β(或γ)-羟基-ω-烯基- ω-硫代烯烃,其锂原子可以很容易地被H,D或C基团(例如CO 2和Me)取代。