A process for the preparation of 2-alkoxy- N-(1-azabicyclo[2.2.2]octan-3-yl) aminobenzamides, which are gastric pharmaceuticals in monogastric animals having the formaula:
wherein R is hydrogen or loweralkyl,
R' is lowealkyl,
R2 is hydrogen, halo or loweralkoxy, Am is amino, methlamino or dimethylamino
is disclosed wherein in the initial step an appropriate monoprotonated 3-aminoquinuclidine strong acid salt and an appropriate amino benzoic acid all in a 50-90 vol. % pyridine in water solution are reacted in the presence of N,N'-dialkylcarbodiimide. The free base may be obtained by conventional procedures from the mixtures with minimal purification effort.
一种制备 2-烷氧基-N-(1-氮杂
双环[2.2.2]辛烷-3-基)
氨基苯甲酰胺的工艺,该工艺可作为单胃动物的胃药,其配方如下:
其中 R 是氢或低级烷基、
R' 是低烷基、
R2 是氢、卤素或低级烷氧基,Am 是
氨基、甲
氨基或
二甲氨基
本发明公开了在初始步骤中,在 N,N'-二烷基碳二
亚胺的存在下,适当的
单质子化
3-氨基奎宁环强酸盐和适当的
氨基
苯甲酸在 50-90 体积%的
吡啶水溶液中发生反应。游离碱可通过常规方法从混合物中获得,纯化工作量极小。