申请人:Belyk Kevin
公开号:US20090281306A1
公开(公告)日:2009-11-12
An efficient synthesis for the preparation of N-[(3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-yl]-4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1-carboxamide, by coupling (3R,6S)-3-amino-6-(2,3-difluorophenyl)-1-(2,2,2-trifluoroethyl)azepan-2-one and 2-oxo-1-(4-piperidinyl)-2,3-dihydro-1H-imidazo[4,5-b]pyridine dihydrochloride with 1,1′-carbonyldiimidazole (“CDI”) as carbonyl source; and an efficient preparation of the potassium salt of N-[(3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-yl]-4-(2-oxo-2,3-dihydro-1H-imidazo[4,5-b]pyridin-1-yl)piperidine-1-carboxamide.
一种高效的合成方法,用于制备N-[(3R,6S)-6-(2,3-二氟苯基)-2-氧代-1-(2,2,2-三氟乙基)氮杂丙酰胺基]-4-(2-氧代-2,3-二氢-1H-咪唑并[4,5-b]吡啶-1-基)哌啶-1-羧酰胺,通过将(3R,6S)-3-氨基-6-(2,3-二氟苯基)-1-(2,2,2-三氟乙基)氮杂丙酮和2-氧代-1-(4-哌啶基)-2,3-二氢-1H-咪唑并[4,5-b]吡啶二盐酸盐与1,1'-羰基二咪唑(“CDI”)作为羰基源进行偶联;以及一种高效的制备钾盐的方法N-[(3R,6S)-6-(2,3-二氟苯基)-2-氧代-1-(2,2,2-三氟乙基)氮杂丙酰胺基]-4-(2-氧代-2,3-二氢-1H-咪唑并[4,5-b]吡啶-1-基)哌啶-1-羧酰胺。