Endo-selective Diels-Alder reaction of methacrylonitrile: application to the synthesis of Georgywood

被引：7

作者：

Borosy, Andras ^{[1
]}

Frater, Georg ^{[1
]}

Mueller, Urs ^{[1
]}

Schroeder, Fridtjof ^{[1
]}

机构：

[1] Givaudan Schweiz AG, Dept Chem Res, CH-8600 Dubendorf, Switzerland

来源：

TETRAHEDRON | 2009年 / 65卷 / 50期

关键词：

IONIC LIQUIDS; COMPLEXES; CATALYSTS; HYDROCARBONS; DERIVATIVES; ACTIVATION; ODORANTS; ROUTE; FURAN; DIENE;

D O I：

10.1016/j.tet.2009.09.089

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Diels-Alder reactions of alkyl-substituted dienes with acrylonitriles give good yields and endo-selectivities if catalyzed by (organo)aluminum, (organo)boron or gallium halides. The activity of these group Ilia Lewis acids in this reaction correlates with the coordination strength of their nitrite complexes, which deactivate Lewis acids sufficiently, so that the subsequently added diene partner undergoes the Diels-Alder reaction without serious side-reactions. Boron trichloride is the most effective catalyst for this purpose. This method gives the best endo/exo-ratios reported so far for these components and was applied in the selective synthesis of the olfactory vector of Georgywood (R). (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：10495 / 10505

页数：11

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