Improved Dienophilicity of Nitrocycloalkenes: Prospects for the Development of a <i>trans</i>-Diels−Alder Paradigm
作者:Woo Han Kim、Jun Hee Lee、Samuel J. Danishefsky
DOI:10.1021/ja9058926
日期:2009.9.9
The development of an efficient and stereoselective trans-Diels-Alder paradigm is described. A central element of this transformation is the introduction of a temporary dienophilic functionality (A), which serves both to activate the substrate for Diels-Alder cycloaddtion and, through its subsequent removal, to facilitate conversion of the cis-fused cycloadducts to the trans-fused series.
描述了一种高效和立体选择性的 trans-Diels-Alder 范式的发展。这种转变的一个核心要素是引入了一个临时的亲双烯官能团 (A),它既可以激活 Diels-Alder 环加成的底物,又可以通过随后的去除促进顺式稠合环加成物转化为反式-融合系列。