readily available preclinical candidate BYK 405879 (1) as starting material. The 5-amino function was installed by the Curtius rearrangement of carboxylic acid 2 or by the Hofmann rearrangement of carboxamide 8 furnishing benzimidazole 3 as key intermediate. In the Ghosh Schild rat, some of the target compounds 10–14 showed noteworthy activity as potassium-competitive acid blockers.
使用易于获得的临床前候选物BYK 405879(1)作为快速原料,可以快速开发出新型的5-甲酰胺取代的四氢
铬并[7,8 - d ]
咪唑4。5-
氨基官能团是通过
羧酸2的Curtius重排或羧甲基酰胺8的霍夫曼重排而提供的,其中
苯并咪唑3是关键中间体。在戈什的Schild大鼠,一些目标的化合物10 - 14显示值得注意活性
钾竞争性酸阻滞剂。