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    • 2. 发明申请
    • Novel Process For The Preparation Of Leuprolide And Its Pharmaceutically Acceptable Salts Thereof
    • 用于制备亮丙瑞林及其药学上可接受的盐的新方法
    • US20130060004A1
    • 2013-03-07
    • US13696656
    • 2011-05-04
    • Ananda KuppannaBulli Raju KamanaSreelatha VanjivakaDebashish Datta
    • Ananda KuppannaBulli Raju KamanaSreelatha VanjivakaDebashish Datta
    • C07K1/10C07K1/14C07K7/08
    • C07K7/23
    • The present invention relates to a novel process for the preparation of Leuprolide or its pharmaceutically acceptable salts thereof by solid and solution phase peptide synthesis (Hybrid approach). The present invention also relates to a process for the preparation of Leuprolide or its pharmaceutically acceptable salts thereof by synthesizing the peptide fragments by solid phase (7 and 5 amino acids fragment) and solution phase (2 and 4 amino acids fragment) respectively. The final solution phase condensation of these peptide fragments (7+2 and 5+4) led to a nonapeptide Leuprolide in the protected form. The present invention further relates to novel peptide fragements—Pyr-His(Trt)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-DLeu-Leu-OH (Fragment-11); H-Arg(Pbf)-Pro-NHEt (Fragment-I11); Pyr-His(Trt)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-DLeu-Leu-Arg(Pbf)-Pro-NHEt (Protected Leuprolide) (Fragment-IV); Pyr-His(Trt)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-OH (Fragment-V); H-DLeu-Leu-Arg(Pbf)-Pro-NHEt (Fragment-VI) and process for the preparation thereof.
    • 本发明涉及通过固相和溶液相肽合成制备亮丙瑞林或其药学上可接受的盐的新方法(Hybrid approach)。 本发明还涉及通过分别通过固相(7和5个氨基酸片段)和溶液相(2和4个氨基酸片段)合成肽片段来制备亮丙瑞林或其药学上可接受的盐的方法。 这些肽片段(7 + 2和5 + 4)的最终溶液相缩合导致了受保护形式的一种单肽亮丙瑞林。 本发明还涉及新颖的肽片段 - Pyr-His(Trt)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-DLeu-Leu-OH(片段-11); H-Arg(Pbf)-Pro-NHEt(Fragment-I11); Pyr-His(Trt)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-DLeu-Leu-Arg(Pbf)-Pro-NHEt(受保护的亮丙瑞林)(片段-IV) Pyr-His(Trt)-Trp(Boc)-Ser(tBu)-Tyr(tBu)-OH(片段-V); H-DLeu-Leu-Arg(Pbf)-Pro-NHEt(片段-VI)及其制备方法。