Process for preparing 3-[(4S)-8-bromo-1-methyl-6-(2-pyridinyl)-4 H-imidazo[1,2-a][1,4]benzodiazepine-4-yl] propionic acid methyl ester or the benzene sulfonate salt thereof, and compounds useful in that process
申请人:PAION UK Limited
公开号:EP2305647A1
公开(公告)日:2011-04-06
The invention concerns a new process for preparing 3-[(4S)-8-bromo-1-methyl-6-(2-pyridinyl)-4H-imidazo[1,2-a][1,4]benzodiazepine-4-yl]-propionic acid methyl ester
or
3-[(4S)-8-bromo-1-methyl-6-(2-pyridinyl)-4H-imidazo[1,2-a][1,4]benzodiazepine-4-yl]propionic acid methyl ester benzene sulfonate (P)
which comprises reacting 3-[(S)-7-bromo-2-((R and/or S)-2-hydroxy-propylamino)-5-pyridin-2-yl-3H-benzo[e][1,4]diazepin-3-yl]-propionic acid methyl ester of formula (EM)
with an oxidizing agent and optionally treating the reaction product under acidic conditions, such as to produce the compound of formula (F) or the compound (P), and new compounds useful as starting material or as intermediate for performing that process.
该发明涉及一种新的制备3-[(4S)-8-溴-1-甲基-6-(2-吡啶基)-4H-咪唑[1,2-a][1,4]苯并二氮平-4-基]-丙酸甲酯或3-[(4S)-8-溴-1-甲基-6-(2-吡啶基)-4H-咪唑[1,2-a][1,4]苯并二氮平-4-基]-丙酸甲酯苯磺酸盐(P)的新工艺,包括将式(EM)的3-[(S)-7-溴-2-((R和/或S)-2-羟基丙基氨基)-5-吡啶-2-基-3H-苯并[e][1,4]二氮平-3-基]-丙酸甲酯与氧化剂反应,可选择在酸性条件下处理反应产物,从而产生式(F)或化合物(P),以及用作该过程的起始物或中间体的新化合物。