申请人:Council of Scientific and Industrial Research
公开号:US06362331B1
公开(公告)日:2002-03-26
The present invention provides a process for the preparation of a novel pyrrolo[2,1-c][1,4]benzodiazepine of formula VI wherein R is H, OII, OAc and R1 is H, and n is 3 to 5, by
reacting (2S)-N-[4-hydroxy-5-methoxy-2-nitrobenzyl]-pyrrolidine-2-carboxy-carbaldehyde diethyl thioacetal with a dibromoalkane, isolating (2S)-N-[4-(3-bromoalkoxy)-5-methoxy-2-nitrobenzoyl]pyrrolidine-2-carboxy carbaldehyde diethyl thioacetal so formed and reacting the isolate with a dilactam, isolating 8-{[(2S)-N-5-methoxy-2-nitrobenzoyl]pyrrolidin-2-carbaldehyde diethylthioacetal}-alkoxy-7-methoxy-2,3,5,10,11,11a-hydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine-5,11 dione, reducing the above nitro compound, isolating the 8-{[(2S)-N-5-methoxy-2-aminobenzoyl]pyrrolidin-2-carbaldehyde diethylthioacetal]-alkoxy-7-methoxy-2,3,5,10,11,11a-hydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine-5,11-dione, reacting the amino compound above with a deprotecting agent to obtain the pyrrolo[2,1-c][1,4]benzodiazepines of formula VI wherein R, R1 and n are as stated above.
本发明提供了一种制备新型
吡咯并[2,1-c][1,4]苯二氮平的方法,其
化学式为VI,其中R为H、OII、OAc,R1为H,n为3至5,通过将(2S)-N-[
4-羟基-5-甲氧基-2-
硝基苯基]-
吡咯烷-2-羧醛二乙
硫代
缩醛与二
溴代烷反应,分离所形成的(2S)-N-[4-(3-
溴代氧基)-5-甲氧基-2-
硝基苯甲酰基]-
吡咯烷-2-羧醛二乙
硫代
缩醛,然后将其与二内酰胺反应,分离8-[(2S)-N-5-甲氧基-2-
硝基苯甲酰基]
吡咯烷-2-羧醛二乙
硫代
缩醛]-烷氧基-7-甲氧基-2,3,5,10,11,11a-羟基-1H-
吡咯并[2,1-c][1,4]苯二氮平-5,11-二酮,还原上述
硝基化合物,分离8-[(2S)-N-5-甲氧基-2-
氨基苯甲酰基]
吡咯烷-2-羧醛二乙
硫代
缩醛]-烷氧基-7-甲氧基-2,3,5,10,11,11a-羟基-1H-
吡咯并[2,1-c][1,4]苯二氮平-5,11-二酮,将上述
氨基化合物与去保护剂反应以获得
化学式为VI的
吡咯并[2,1-c][1,4]苯二氮平,其中R、R1和n如上所述。