ASYMMETRIC CATALYSIS OF ENE-TYPE REACTION WITH FLUORAL BY CHIRAL TITANIUM COMPLEX - A SEMIEMPIRICAL AND AB-INITIO ANALYSIS OF ENE REACTIVITY

被引:47
作者
MIKAMI, K [1 ]
YAJIMA, T [1 ]
TERADA, M [1 ]
UCHIMARU, T [1 ]
机构
[1] MINIST INT TRADE & IND,AGCY IND SCI & TECHNOL,NATL INST MAT & CHEM RES,TSUKUBA 305,JAPAN
关键词
D O I
10.1016/S0040-4039(00)60408-2
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The chiral titanium complex-catalyzed ene-type reaction with fluoral is shown to serve as an efficient route for the asymmetric synthesis of CF3-substituted compounds of biological and synthetic importance in extremely high enantiomeric excesses (>95% ee). The ene reactivity of trihaloacetaldehyde including fluoral is estimated in terms of the balance of LUMO energy level vs. electron density on the carbonyl carbon.
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页码:7591 / 7594
页数:4
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