Amination by lithium alkylamide reagents of ketimines derived from 2-(trifluoromethyl)anilines and methyl halophenyl ketones and their cyclization products 2-(halophenyl)quinolin-4-amines
作者:Lucjan Strekowski、Lubomir Janda、Steven E Patterson、Johnny Nguyen
DOI:10.1016/0040-4020(95)01110-2
日期:1996.2
title ketimines containing a fluorine atom at position 2 of the phenyl group are efficiently cyclized under mild conditions to N-[2-(dimethylamino)ethyl]-2-(2-fluorophenyl)quinolin-4-amines by the reaction with a lithium reagent derived from N,N-dimethylethylenediamine. The facile regioselective displacement of C2-F in the presence of another fluorine atom at the phenyl group by the same reagent or
通过与锂的反应,在温和的条件下将在苯基的第2位上含有氟原子的标题酮亚胺有效地环化为N- [2-(二甲基氨基)乙基] -2-(2-氟苯基)喹啉-4-胺。由N,N-二甲基乙二胺衍生的试剂。通过相同的试剂或N-硫代-N在苯基上存在另一个氟原子的情况下C2-F的区域选择性迁移用复杂诱导邻近效应(CIPE)过程解释了较高温度下的'-甲基哌嗪。CIPE工艺可在环化为喹啉之前通过反应性更高的哌嗪试剂对2-氟苯基酮亚胺进行胺化。2-氯苯基衍生物在CIPE辅助胺化反应中的反应性要低得多。