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    • 1. 发明申请
    • PROCESS FOR PURIFICATION OF APREPITANT
    • 净化方法
    • WO2008026216A2
    • 2008-03-06
    • PCT/IN2006/000312
    • 2006-08-28
    • HETERO DRUGS LIMITEDPARTHASARADHI, Reddy, BandiRATHNAKAR REDDY, KuraRAJI REDDY, RapoluMURALIDHARA REDDY, DasariSRINIVASA RAO, Thungathurthy
    • PARTHASARADHI, Reddy, BandiRATHNAKAR REDDY, KuraRAJI REDDY, RapoluMURALIDHARA REDDY, DasariSRINIVASA RAO, Thungathurthy
    • C07D413/06
    • C07D413/06
    • The present invention relates to a process for obtaining pure aprepitant substantially free of undesired diastereomeric isomer, namely 5-[2(S)-[I (RS)- [3,5-bis(trifluoromethyl)-phenyl)ethoxy]-3-(S)-(4-fluorophenyl)-morpholin-4-yl- methyl]-3,4-dihydro-2H-1,2,4-triazol-3-one. The present invention further provides an improved process for preparation aprepitant crystalline form II. The present invention also relates to novel amorphous form of aprepitant, process for its preparation and to a pharmaceutical composition comprising it. The present invention further relates to aprepitant having mean particle size of less than about 11.5 microns, process for its preparation and to a pharmaceutical composition comprising it. Thus, for example, aprepitant having the content of diastereomeric impurity of 1.1 % is dissolved in ethyl acetate at 700C, the solution is concentrated to half the initial volume by distilling off ethyl acetate, and the resulting solid is collected at 0 - 50C to give pure aprepitant substantially free of diastereomeric impurity.
    • 本发明涉及一种获得基本上不含不期望的非对映体异构体的纯阿拉米特的方法,即5- [2(S) - [I(RS) - [3,5-双(三氟甲基) - 苯基) - 乙氧基] -3- (S) - (4-氟苯基) - 吗啉-4-基 - 甲基] -3,4-二氢-2H-1,2,4-三唑-3-酮。 本发明进一步提供了一种改进的制备阿瑞匹坦晶型II的方法。 本发明还涉及新型无定形形式的阿拉米特,其制备方法和包含它的药物组合物。 本发明还涉及具有小于约11.5微米的平均粒度的制剂,其制备方法和包含其的药物组合物。 因此,例如,将具有1.1%非对映异构体杂质的阿瑞消制剂在70℃下溶于乙酸乙酯中,通过蒸馏除去乙酸乙酯将溶液浓缩至初始体积的一半,在0-50℃收集所得固体,得到 基本上不含非对映异构体杂质的纯APR。
    • 5. 发明申请
    • PROCESS FOR PREPARING PURE CEPHALOSPORINE INTERMEDIATES
    • 制备纯中间体中间体的方法
    • WO2006008749A1
    • 2006-01-26
    • PCT/IN2004/000209
    • 2004-07-16
    • HETERO DRUGS LIMITEDPARTHASARADHI REDDY, BandiRATHNAKAR REDDY, KuraRAJI REDDY, RapoluMURALIDHARA REDDY, DasariMURALI, Nagabelli
    • PARTHASARADHI REDDY, BandiRATHNAKAR REDDY, KuraRAJI REDDY, RapoluMURALIDHARA REDDY, DasariMURALI, Nagabelli
    • C07D501/18
    • C07D501/00
    • The present invention relates to a process for preparing key intermediates for cephalosporin antibiotics substantially free of undesired delta A 2 isomer. Thus, 7-aminocephalosporanic acid (7-ACA) is silylated with hexamethyldisilazane in cyclohexane at reflux temperature. (6R,7R)-3-[(Acetyloxy)methyl]-7-(trimethylsilyl)aminoceph-3-em-4-oic acid obtained is reacted with the mixture of N-methylpyrrolidine and trimethylsilyliodide in cyclohexane, desilylated with isopropyl alcohol and treated with hydrochloric acid to obtain [6R-(6a,7b)]-1-[[7-Amino-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]-1-methylpyrrolidinium inner salt hydrochloride. [6R-(6a,7b)]-1-[[7-Amino-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]-1-methylpyrrolidinium inner salt hydrochloride is N-acylated with syn-2-(2-aminothiazol-4-yl)-2-methoxyimino acetic acid 2-benzothiazolyl thioester (MAEM) followed by treatment with hydrochloric acid to give cefepime dihydrochloride monohydrate.
    • 本发明涉及一种制备基本上不含不需要的ΔA2异构体的头孢菌素抗生素的关键中间体的方法。 因此,将7-氨基头孢烷酸(7-ACA)在环己烷中在回流温度下用六甲基二硅氮烷甲硅烷基化。 (6R,7R)-3 - [(乙酰氧基)甲基] -7-(三甲基甲硅烷基)氨基头孢-3-烯-4-酸与N-甲基吡咯烷和三甲基甲硅烷基碘的混合物在环己烷中反应,用异丙醇脱甲硅烷基酯, 用[6R-(6a,7b)] - [[7-氨基-2-羧基-8-氧代-5-硫杂-1-氮杂双环[4.2.0]辛-2-烯-1-酮 吡啶-3-基]甲基] -1-甲基吡咯烷鎓盐内盐酸盐。 [6R-(6a中,图7b)] - 1 - [[7-氨基-2-羧基-8-氧代-5-硫杂-1-氮杂双环〔4.2.0〕辛-2-烯-3-基]甲基] -1-甲基吡咯烷鎓盐内盐酸盐与顺-2-(2-氨基噻唑-4-基)-2-甲氧基亚氨基乙酸2-苯并噻唑基硫酯(MAEM)进行N-酰化,接着用盐酸处理,得到头孢吡肟二盐酸盐一水合物。