blood of mice. Reduction of 9-[4-acetoxy-3-(acetoxymethyl)but-1-yl]-2-amino-6-chloropurine (13) using ammonium formate and 10% palladium on carbon afforded the 2-aminopurine 14, which was hydrolyzed to the monoacetate 15 and to 2-amino-9-[4-hydroxy-3-(hydroxymethyl)but-1-yl]purine (5). The 2-aminopurine 5 was subsequently converted to additional monoester (17, 21-23) and diester (16, 24) derivatives
已合成了抗疱疹病毒无环核苷9- [
4-羟基-3-(羟甲基)丁-1-基]
鸟嘌呤(1,BRL 39123)的潜在口服前药,并评估了其在小鼠血液中的
生物利用度1。用
甲酸铵和10%
钯/碳还原9- [4-乙酰氧基-3-(乙酰氧基甲基)丁-1-基] -
2-氨基-6-氯嘌呤(13),得到
2-氨基嘌呤14,将其
水解生成单
乙酸酯15和2-
氨基-9- [
4-羟基-3-(羟甲基)丁-1-基]
嘌呤(5)。随后将
2-氨基嘌呤5转化为其他单酯(17,21-23)和二酯(16,24)衍
生物及其二-O-异亚丙基衍
生物18。5及其酯(14-17,21,22 ),另外18种在口服后吸收良好,并有效地转化为1,
二乙酰(14)和二丙酰基(16)酯在血液中提供的1浓度比给药1或其酯(25-27)后观察到的浓度高15倍以上。一些6-烷氧基-9- [
4-羟基-3-(羟甲基)丁-1-基]
嘌呤(8-10)的制备方法先前已有报道,它们也显示