申请人:Syntex (USA) Inc.
公开号:US05543414A1
公开(公告)日:1996-08-06
Compounds of the Formula I ##STR1## wherein X is hydrogen, chloro, amino or hydroxy; R.sup.1 is an achiral amino acid acyl residue with a tertiary .alpha.-carbon atom. Preferred achiral amino acid acyl residues have the formula ##STR2## wherein each R.sup.2 is alkyl with 1 to 6 carbon atoms, cycloalkyl with 3 to 5 carbon atoms, or benzyl; or the two R.sup.2 groups link together to form a polymethylene group with 3 to 9 carbon atoms, and pharmaceutically acceptable salts thereof are antiviral agents with improved absorption. Intermediates for the preparation of the compounds of Formula I are also described.
化合物I的公式为##STR1## 其中X为氢、氯、氨基或羟基;R.sup.1是带有三级α-碳原子的非手性氨基酸酰基残基。优选的非手性氨基酸酰基残基具有以下公式##STR2## 其中每个R.sup.2为1至6个碳原子的烷基、3至5个碳原子的环烷基或苄基;或两个R.sup.2基团连接在一起形成具有3至9个碳原子的聚亚甲基基团,以及其药学上可接受的盐是具有改善吸收的抗病毒剂。还描述了制备化合物I的中间体。