Metal cation-exchanged montmorillonite(Mn+-Mont)-catalysed carbonyl-ene reactions

被引：39

作者：

Tateiwa, J ^{[1
]}

Kimura, A ^{[1
]}

Takasuka, M ^{[1
]}

Uemura, S ^{[1
]}

机构：

[1] KYOTO UNIV, GRAD SCH ENGN, DEPT ENERGY & HYDROCARBON CHEM, SAKYO KU, KYOTO 60601, JAPAN

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1 | 1997年 / 15期

关键词：

D O I：

10.1039/a702906c

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Metal cation-exchanged montmorillonite (Mn+-mont) works in acetonitrile at 80 degrees C as a Lewis acid catalyst for the intermolecular carbonyl-ene reaction of alpha-methylstyrenes with paraformaldehyde to give the corresponding homoallylic alcohols, Zr4+-mont being the most effective of the many Mn+-mont catalysts examined, Similarly, the catalyst is also useful for the highly stereoselective intramolecular cyclization of citronellals to afford isopulegols, the reaction being much faster, Regeneration of the catalyst is confirmed for Zr4+-mont, which can be effectively recycled at least five times.

引用

页码：2169 / 2174

页数：6

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