ASYMMETRIC CATALYSIS BY A NEW-TYPE OF CHIRAL BINAPHTHOL-TITANIUM COMPLEX

被引:64
作者
KITAMOTO, D
IMMA, H
NAKAI, T
机构
[1] TOKYO INST TECHNOL,DEPT CHEM TECHNOL,MEGURO KU,TOKYO 152,JAPAN
[2] NATL INST MAT & CHEM RES,TSUKUBA,IBARAKI 305,JAPAN
关键词
D O I
10.1016/0040-4039(95)00134-X
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A new type of chiral 1,1'-bi-2-naphthol (BINOL)-derived titanium complex, prepared via complete hydrolysis of the complex formed in situ hy mixing (i-PrO)(4)Ti and (R)-BINOL followed by azeotrope, serves as an efficient and moisture-tolerable enantioselective catalyst for the glyoxylate-ene reaction (>98% eel, and shows a remarkable level of asymmetric amplification therein A mu-oxo dimer structure is proposed for the new catalyst.
引用
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页码:1861 / 1864
页数:4
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