Cation−n Control of Regiochemistry of Intramolecular Schmidt Reactions en Route to Bridged Bicyclic Lactams
作者:Michal Szostak、Lei Yao、Jeffrey Aubé
DOI:10.1021/ol901771b
日期:2009.10.1
The regiochemistry of the intramolecular Schmidt reaction of 2-azidoalkylketones is controlled by placing a thioether substituent at the position adjacent to the ketone to provide access to a family of unsubstituted medium bridged twisted amides. This outcome is ascribed to the presence of stabilizing through-space interactions between the diazonium cation and the n electrons on heteroatom and does
通过将硫醚取代基置于与酮相邻的位置来控制2-叠氮基烷基酮的分子内Schmidt反应的区域化学,以提供进入未取代的介质桥联的扭曲酰胺族的途径。该结果归因于重氮阳离子与杂原子上的n电子之间存在稳定的贯穿空间相互作用,并且不需要酮的锁定构象。