An improved process for the preparation of Tenofovir disoproxil and pharmaceutically acceptable salts thereof
申请人:Zentiva, k.s.
公开号:EP2860185A1
公开(公告)日:2015-04-15
An improved process for the preparation of Tenofovir disoproxil and pharmaceutically acceptable salts thereof, comprising following steps:
a) alkylation of adenine with (R)-4-methyl-1,3-dioxolan-2-one and isolation of (R)-1-(6-amino-9H-purin-9-yl)propan-2-ol;
b) alkylation of (R)-1-(6-amino-9H-purin-9-yl) propan-2-ol with a dialkyl p-toluenesulphonyloxymethylphosphonate or dialkyl halomethylphosphonate to give dialkylester of (R)-9-[2-(phosphonomethoxy)propyl]adenine;
c) preparation of (R)-9-[2-(phosphonomethoxy)propyl]adenine ((R)-PMPA; Tenofovir) by dealkylation of the phosphonate moiety with a mineral acid under microwave irradiation;
d) preparation of Tenofovir disoproxil;
e) preparation of the fumarate salt or other pharmaceutically acceptable salt of Tenofovir disoproxil.
一种改进的Tenofovir disoproxil及其药用盐的制备方法,包括以下步骤:a) 使用(R)-4-甲基-1,3-二氧杂环戊酮烷基化腺嘌呤并分离(R)-1-(6-氨基-9H-嘌呤-9-基)丙醇;b) 使用二烷基对甲苯磺酰氧甲基膦酸酯或二烷基卤代甲基膦酸酯对(R)-1-(6-氨基-9H-嘌呤-9-基)丙醇进行烷基化,得到(R)-9-[2-(磷酸甲氧基)丙基]腺嘌呤的二烷基酯;c) 通过微波辐射下使用矿酸去烷基化磷酸酯部分,制备(R)-9-[2-(磷酸甲氧基)丙基]腺嘌呤((R)-PMPA; Tenofovir);d) 制备Tenofovir disoproxil;e) 制备Tenofovir disoproxil的富马酸盐或其他药用可接受的盐。