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%)。