Cyclization of N-alkenyl-o-chloroanilides with organonickel(0) complexes: conformational analysis of 3-substituted oxindoles
作者:J. Gonzalo Rodriguez、Laureano Canoira、Fernando Temprano
DOI:10.1039/p29860001193
日期:——
3-Substituted oxindoles (1)–(6) have been obtained as the main products of the cyclization reaction of N-alkenyl-o-chloroanilides with the zerovalent complex tetrakis (triphenylphosphine)nickel(0). 1H N.m.r. spectra of the oxindoles (2)–(6) show an AMX proton system for the CH–CH2R2 fragment. Conformational analyses of this fragment for (2)–(6) are given. Moreover, conformational analysis of the N-β-cyanoethyl
N-烯基-邻氯苯胺与零价四(三苯基膦)镍(0)配合物的环化反应主要产物是3-取代的吲哚(1)–(6)。羟吲哚(2)–(6)的1 H Nmr光谱显示了CH–CH 2 R 2片段的AMX质子系统。给出了该片段在(2)–(6)中的构象分析。此外,还给出了羟吲哚(6)中N -β-氰乙基链的构象分析。