Convenient Access to 2-Arylpyrroles from 2-Lithio-<i>N</i>,<i>N</i>-dibenzylcyclopropylamine and Nitriles
作者:Jan Szymoniak、Armin de Meijere、Chloé Tanguy、Philippe Bertus、Oleg Larionov
DOI:10.1055/s-2006-950410
日期:2006.9
N,N-Dibenzylaminocyclopropyl ketimines formed as intermediates upon treatment of 2-lithiated N,N-dibenzylcyclopropylamines with nitriles, being donor-acceptor-substituted cyclopropanes, immediately underwent ring-enlarging rearrangement and 1,2-elimination of dibenzylamine to produce 2-substituted pyrroles in good yields (14 examples, 55-80%).
N,N-二苄基氨基环丙基酮亚胺作为中间体,在用腈处理2-锂化的N,N-二苄基环丙基胺时形成,它们是供体-受体取代的环丙烷,立即发生环扩大重排和二苄基胺的1,2-消除,以良好产率生成2-取代吡咯(14个例子,产率为55-80%)。