An Improved Preparation of (R)-3-Aminobutanol, a Key Intermediate for the Synthesis of Dolutegravir Sodium
作者:Y. Srinivasa Rao、B. Hari Babu、I. Aminual、D. Nageshwar、P.V.V. Satyanarayana
DOI:10.2174/1570180814666170602083756
日期:2017.10.31
present method is highly economical and eliminates the use of expensive catalysts. Moreover, the reaction conditions adopted in this process are mild and suitable for industrial applications and is further supported by our study with a large scale (up to 30 Kg) and the yields obtained are quite good. It is our claim that the present methodology is extremely useful for preparation of (R)-3-aminobutanol
背景:Dolutegravir钠是一种HIV-1整合酶链转移抑制剂(INSTI),建议与其他抗逆转录病毒药物联合用于治疗HIV-1感染。此外,它是第二代HIV整合酶抑制剂,旨在提供有效的抗病毒活性。最初,Shionogi和葛兰素史克(GSK)之间的合作导致了多洛格韦钠,其商品名为Tivicay®。其合成涉及(R)-3-氨基丁醇(1)与3-苄氧基-4-氧代-1-(2-氧代乙基)-1,4-二氢吡啶-2,5-二羧酸2-甲酯的反应。后来,(R)-3-氨基丁醇成为合成Dolutegravir钠的关键中间体。 方法:在我们的方法中,以4-羟基2-丁酮为起始原料,通过三步/四步合成规程合成(R)-3-氨基丁醇,首先用羟胺形成肟,然后替换发达的锂铝使用阮内镍(Niney)的氢化物(LAH)还原肟,该化合物以约85-90%的收率提供了3-氨基丁醇的对映体混合物,与早期方法相比,收率更高(收率:70%)。进一