(E)-α-Selanylvinylzirconium and (E)-α-silylvinylzirconium complexes 2 were prepared conveniently via hydrozirconation of the alkynylselenides and the alkynylsilanes 1, respectively. Intermediates 2 were reacted with acyl chlorides 3 via Zr-Cu transmetalation with retention of the configuration to afford α-seleno or α-silyl α,β-unsaturated ketones 4 in good yield.
(E)-δ-
硒基
乙烯基锆和(E)-δ-
硅基
乙烯基锆络合物 2 分别通过炔基
硒化物和炔基
硅烷 1 的氢氮化反应方便地制备出来。中间体 2 与酰基
氯 3 通过 Zr-Cu 反
金属化反应,保留构型,得到δ±-
硒化物或δ±-
硅烷基δ±,δ²-不饱和酮 4,收率很高。