Catalytic asymmetric Henry reactions of silyl nitronates with aldehydes

被引：117

作者：

Risgaard, T ^{[1
]}

Gothelf, KV ^{[1
]}

Jorgensen, KA ^{[1
]}

机构：

[1] Aarhus Univ, Danish Natl Res Fdn, Ctr Catalysis, Dept Chem, DK-8000 Aarhus C, Denmark

来源：

ORGANIC & BIOMOLECULAR CHEMISTRY | 2003年 / 1卷 / 01期

关键词：

D O I：

10.1039/b208859m

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A catalytic enantioselective Henry reaction of silyl nitronates with aldehydes has been developed. Different chiral Lewis acids have been tested for the reaction and it has been found that a variety of-chiral copper-ligand complexes can catalyze the Henry reaction. The best yield, diastereo- and enantioselectivity of the nitroalcohols formed are obtained by the application of a copper(II)-diphenyl-bisoxazoline complex as the catalyst in the presence of tetrabutylammonium triphenylsilyldifluorosilicate (TBAT). In order to minimize the epimerization of the nitroaldol products they were converted into the corresponding Mosher esters. The reaction proceeds well for different aromatic aldehydes reacting with alkyl nitronates.

引用

页码：153 / 156

页数：4

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