Enantio- and diastereoselective catalysis of addition reaction of allylic silanes and stannanes to glyoxylates by binaphthol-derived titanium complex
作者:Seiichi Aoki、Koichi Mikami、Masahiro Terada、Takeshi Nakai
DOI:10.1016/s0040-4020(01)80535-4
日期:1993.2
Chiral titanium complex (1), prepared in situ from optically pure binaphthol and diisopropoxytitanium dihalide in the presence of molecular sieves, is shown to catalyze the addition reactions of crotylsilanes and -stannanes to glyoxylates to afford (syn)-α-hydroxy-β-methyl esters in highly scalemic forms with high diastereoselectivity.
在分子筛存在下由光学纯的联萘酚和二异丙氧基钛二卤化物原位制备的手性钛配合物(1)已显示出催化巴豆基硅烷和-锡烷酸酯向乙醛酸酯的加成反应,从而提供(syn)-α-羟基-β-具有高非对映选择性的高尺度形式的甲基酯。