Synthesis of optically active allenyltitaniums having axial chirality by the reaction of optically active propargylic compounds with a reagent
作者:Sentaro Okamoto、Duk Keun An、Fumie Sato
DOI:10.1016/s0040-4039(98)00829-6
日期:1998.6
(η2-propene)Ti(O-i-Pr)2, generated in situ from Ti(O-i-Pr)4 and 2 equiv of i-PrMgCl, with opticallyactive secondary propargyl phosphate and tertiary propargyl carbonate proceeds with more than 97% chiral transfer, thus providing an efficient and practical method for synthesizing di- and tri-substituted allenyltitaniums with high optical purity.