Reaction of 2,4-Dimethoxy-6-methylpyrimidine (I) with allyl bromide or benzyl bromide afforded 1-substituted 4-methoxy-6-methyl-2(1H)-pyrimidinone intermediates III, X. Oxidation of the compound III afforded racemic cis diol VI. O-Demethylation and nucleophilic displacement of the intermediates III, VI and X gave 1-substituted 6-methyluracils IV, VII, IX and 1-substituted 4-alkylamino-6-methyl-2(1H)-pyrimidinones V, VIII, XII in good yields. The compounds II - XII were evaluated against Ranikhet disease virus (RDV); compounds Vb, VII, X, XIIb - XIId showed 100, 43, 44, 75, 72 and 100% inhibition, respectively.
2,4-二甲氧基-6-甲基嘧啶(I)与烯丙基溴或苄基溴的反应得到了1-取代的4-甲氧基-6-甲基-2(1H)-嘧啶酮中间体III,X。化合物III的氧化产物是外消旋的顺式二醇VI。III、VI和X的脱甲基和亲核置换反应产生了1-取代的6-甲基尿嘧啶IV、VII、IX和1-取代的4-烷基氨基-6-甲基-2(1H)-嘧啶酮V、VIII、XII,收率良好。化合物II-XII对拉尼克特病毒(RDV)进行了评价,其中化合物Vb、VII、X、XIIb-XIId分别显示出100%、43%、44%、75%、72%和100%的抑制率。