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 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.
本发明涉及一种制备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,并可在酸性条件下处理反应产物,以产生式(F)或化合物(P),以及用作执行该过程的起始物或中间体的新化合物。