SILICA AND ALUMINA MODIFIED BY LEWIS-ACIDS AS CATALYSTS IN DIELS-ALDER REACTIONS OF CHIRAL ACRYLATES

被引:33
作者
CATIVIELA, C [1 ]
FIGUERAS, F [1 ]
GARCIA, JI [1 ]
MAYORAL, JA [1 ]
PIRES, E [1 ]
ROYO, AJ [1 ]
机构
[1] ECOLE NATL SUPER CHIM MONTPELLIER,CHIM ORGAN PHYS & CINET CHIM APPL LAB,CNRS,URA 418,F-34053 MONTPELLIER,FRANCE
关键词
D O I
10.1016/S0957-4166(00)80163-9
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Silica and alumina, modified by treatment with AlClEt2 and TiCl4, are tested as catalysts in the reactions of cyclopentadiene (1) with (-)-menthyl acrylate (2a), (R)-O-acryloyl pantolactone (2b) and (S)-O-acryloyl lactate (2c). Silica-modified systems are the most efficient heterogeneous catalysts described to date for this kind of reaction, leading to selectivities similar to those obtained with aluminium homogeneous catalysts. Whereas silica. AlClEt2 is better for the reaction of 2a and 2c, silica. TiCl4 is more suitable for the reaction of 2b.
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页码:621 / 624
页数:4
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