A domino three-component condensation of ortho-haloacetophenones with urea or amines: a novel one-pot synthesis of halogen-substituted quinolines
作者:Chuanmei Qi、Qingwei Zheng、Ruimao Hua
DOI:10.1016/j.tet.2008.12.039
日期:2009.2
Halogen-substituted quinolines have been synthesized in good yields by the condensation and cyclization of two molecules of ortho-haloacetophenones with urea or primary amines. The formation of halogen-substituted quinolines takes place through the unexpected catalyst-free cleavage of C(sp2)–X (X=Cl, Br), α-C(sp3)–H bonds and formation of C–C, C–N bonds in a selective manner. The attractive features
通过将两个邻卤代苯乙酮分子与尿素或伯胺进行缩合和环化,已以高收率合成了卤素取代的喹啉。卤素取代的喹啉的形成是通过C(sp 2)–X(X = Cl,Br),α-C(sp 3)–H键的意外的无催化剂裂解和C–C,C的形成而发生的-N键选择性地键合。本发明的用于卤素取代的喹啉的合成方法的吸引人的特征包括无催化剂的一锅法,容易获得的起始原料以及在喹啉环上引入卤素以进一步转化。