Synthesis of 6-Substituted 9-Benzyl-8-hydroxypurines with Potential Interferon-Inducing Activity
作者:Kazunori Kazaoka、Hironao Sajiki、Kosaku Hirota
DOI:10.1248/cpb.51.608
日期:——
Various 6-substituted 9-benzyl-8-hydroxypurines were synthesized in order to investigate the structure–activity relationship at the 6-position of 9-benzyl-8-hydroxyadenine (1), which is a lead compound for the screening of interferon (IFN)-inducing activity. 6-Unsubstituted, mercapto-, methylthio- and hydroxy-9-benzyl-8-hydroxypurines (2—5) were prepared from 5-amino-1-benzyl-4-cyano-2-hydroxyimidazole (9). Synthesis of a 6-methoxy analog (6) was conducted from 5-amino-4-benzylamino-6-chloropyrimidine (13). 6-Alkylamino and acylaminopurines (7 and 8) were also prepared by alkylation and acylation of 1, respectively. Since these compounds (2—8) indicated no activity, it was found that a free amino group of 1 is required for the expression of IFN-inducing activity.
为了研究 9-苄基-8-羟基腺嘌呤(1)6-位的结构-活性关系,合成了多种 6-取代的 9-苄基-8-羟基嘌呤,而 9-苄基-8-羟基腺嘌呤是筛选干扰素(IFN)诱导活性的先导化合物。由 5-氨基-1-苄基-4-氰基-2-羟基咪唑(9)制备了 6-未取代、巯基、甲硫基和羟基-9-苄基-8-羟基嘌呤(2-5)。由 5-氨基-4-苄基氨基-6-氯嘧啶(13)合成了 6-甲氧基类似物(6)。通过 1 的烷基化和酰基化,还分别制备了 6-烷基氨基和酰基氨基嘌呤(7 和 8)。由于这些化合物(2-8)没有活性,因此发现 1 的游离氨基是表达 IFN 诱导活性的必要条件。