Over 50 ω-carboxyalkyl derivatives of adenine and other purine bases were examined for their inhibitory effects on rat liver S-adenosyl-L-homocysteine hydrolase and their antiviral activity. To be an inhibitor of SAH-hydrolase the analogue must contain an adenine base substituted at the position 9 by an ω-carboxyalkyl (C3-C5) chain bearing at least one hydroxyl function. The absolute configuration at the side-chain is decisive for the dihydroxy and trihydroxy compounds, but less important for the monohydroxyalkanoic acids. D-Eritadenine (1a) and 3-(adenin-9-yl)-2-hydroxypropanoic acids (12a) are the most potent SAH-hydrolase inhibitors and the only compounds possessing an antiviral activity (against vesicular stomatitis, parainfluenza type 3, reovirus type 1, and vaccinia virus). All these compounds effect a rapid irreversible inactivation of SAH-hydrolase. The esters of 1a and 12a exhibit little, if any inhibitory activity toward the enzyme; they are, however, much more potent antiviral agents than the parent compounds 1a and 12a, most probably acting as prodrugs of the latter. 2-Amino-D-eritadenine, (2R,3R)-5-(adenin-9-yl)-2,3-dihydroxypentanoic acid, 9-(dicarboxymethyl)adenine, 4-(adenin-9-yl)-2-hydroxybutanoic acid, 3-(8-bromoadenin-9-yl)-2-hydroxypropanoic acid and O-carboxymethyl derivatives of 9-(2,3-dihydroxypropyl)- and 9-(2,3,4-trihydroxybutyl)adenine are described as novel compounds.
对
腺嘌呤和其他
嘌呤碱的50多个ω-羧基烷基衍
生物进行了研究,以评估它们对大鼠肝S-
腺苷-L-同型半胱
氨酸
水解酶的抑制作用和抗病毒活性。要成为
SAH-
水解酶的
抑制剂,类似物必须在位置9处含有一个
腺嘌呤碱基,该碱基被一个至少具有一个羟基功能的ω-羧基烷基(C3-C5)链所取代。侧链的绝对构型对二羟基和三羟基化合物至关重要,但对单羟基
脂肪酸的重要性较小。 D-厄利他
嘌呤(1a)和3-(
腺嘌呤-9-基)-2-羟基
丙酸(12a)是最有效的
SAH-
水解酶
抑制剂,也是唯一具有抗病毒活性(对
水疱性口炎病毒、副流感病毒3型、类风湿病毒1型和天花病毒有效)。所有这些化合物都对
SAH-
水解酶产生快速不可逆的失活作用。 1a和12a的
酯类对酶的抑制活性很小,如果有的话;然而,它们比母体化合物1a和12a更具有强大的抗病毒作用,很可能作为后者的前药。 2-
氨基-D-厄利他
嘌呤,(2R,3R)-5-(
腺嘌呤-9-基)-2,3-二羟基
戊酸,9-(二羧甲基)
腺嘌呤,4-(
腺嘌呤-9-基)-2-羟基
丁酸,3-(
8-溴腺嘌呤-9-基)-2-羟基
丙酸和9-(2,3-二羟基丙基)-和9-(2,3,4-三羟基丁基)
腺嘌呤的O-羧甲基衍
生物被描述为新化合物。