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    • 98. 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。