A Highly Effective One-Pot Synthesis of Quinolines from 2-Alkynylnitrobenzenes
摘要:
A highly effective one-pot synthesis of poly-substituted quinolines from 2-alkynylnitrobenzenes using inexpensive reagents has been developed. Reaction of 2-alkynylnitrobenzenes with Sn/HCl in EtOH resulted in the formation of 2-aminophenyl ketones and subsequently condensed in situ with ketones to form tri-substituted quinolines in 80-97% yields.
Improved process for the manufacture of cycloalkyl and haloalkyl o-aminophenyl ketones
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0655436A1
公开(公告)日:1995-05-31
There is provided an improved method for the production of o-aminophenyl ketones of formula I wherein R is C₃-C₆cycloalkyl or C₁-C₆haloalkyl.
There is also provided an effective method for the preparation of the formula I compound o-aminophenyl cyclopropyl ketone via the dehydrohalogenation of 1-(o-aminophenyl)-4-halo-1-butanone in the presence of a base and a phase transfer catalyst.
Compounds of formula I are key intermediates in the manufacture of sulfamoyl urea herbicides.
提供了一种生产式 I 的邻氨基苯基酮的改进方法,其中 R 是 C₃-C₆ 环烷基或 C₁-C₆ 卤代烷基。
本发明还提供了一种在碱和相转移催化剂存在下,通过 1-(邻氨基苯基)-4-卤代-1-丁酮的脱氢卤化反应制备式 I 化合物邻氨基苯基环丙基甲酮的有效方法。
式 I 的化合物是生产氨基磺酰基脲除草剂的关键中间体。
Aryne intermediates towards the preparation of herbicidal sulfamoyl urea and a process for their preparation
申请人:American Cyanamid Company
公开号:EP0852224B1
公开(公告)日:2001-10-31
US6127576
申请人:——
公开号:——
公开(公告)日:——
Aminophenyl ketone derivatives and a method for the preparation thereof