Dual enantioselective Diels–Alder process in the cyclization of chiral acrylamide with dienes
作者:Doo Young Jung、Doo Han Park、Sung Han Kim、Yong Hae Kim
DOI:10.1002/poc.828
日期:2004.11
Diels–Alder cycloadditions of chiral acrylamides with cyclopentadiene or 2, 3-dimethyl butadiene proceed with high diastereofacial selectivity. Either endo-R or endo-S products have been obtained depending upon the structures of acrylamides and Lewis acids used. The endo form was exclusively obtained over the exo form. The dependence of the mechanism of formation of opposite configurations of endo-R
手性丙烯酰胺与环戊二烯或2,3-二甲基丁二烯的Diels-Alder环加成反应具有很高的非对映选择性。任一内-R或内切-S取决于丙烯酰胺和路易斯酸使用的结构产品已获得。该内切过是专门获得形式外形式。讨论了形成内-R或内-S产物相反构型的机理对路易斯酸的依赖性。版权所有©2004 John Wiley&Sons,Ltd.