Process for preparing a 2-(2-amino-1, 6-dihydro-6-oxo-purin-9-yl)methoxy-1,3-propanediol derivative
申请人:Syntex (U.S.A.) Inc.
公开号:US06340756B1
公开(公告)日:2002-01-22
wherein Z1 is hydrogen or an amino-protecting group selected from the group consisting of acyl of the formula R—C(O)—, wherein R is alkyl of 1-6 carbon atoms; trityl, optionally substituted with methoxy; and N-(9-fluorenylmethoxycarbonyl); Y1 is halo, aralkyloxy or acyloxy, wherein acyl is as defined above; and Y2 is aralkyloxy. These intermediates are useful in a novel process for preparing the mono-L-valine ester of 2-(2-amino-1,6-dihydro-6-oxo-purin-9-yl) methoxy-1,3-propanediol (ganciclovir). The mono-L-valine ester of ganciclovir and its pharmaceutically acceptable salts are of value as antiviral agents with improved absorption.
其中,Z1是氢或从包括R—C(O)—的酰基(其中R是1-6个碳原子的烷基)、三苯甲基(可选择性地取代甲氧基)和N-(9-芴甲氧羰基)的氨基保护基中选择的;Y1是卤素、芳基甲氧基或酰氧基,其中酰基如上定义;Y2是芳基甲氧基。这些中间体在一种新型制备2-(2-氨基-1,6-二氢-6-氧基嘌呤-9-基)甲氧基-1,3-丙二醇(甘昔洛韦)的单L-缬氨酸酯的过程中非常有用。甘昔洛韦的单L-缬氨酸酯及其药用可接受盐具有抗病毒药物的价值,且具有改善的吸收性能。