New 2-amino-3-cyanopyrrole derivatives were prepared and converted to 7-deazapurines. 7-Deazaadenine 6 was synthesized by different methods and alkylated with alkyl iodides to afford the quaternized 3-alkylpyrrolopyrimidinium iodide salts 8. The latter salts were dequaternized to N-alkylpyrrolo[2,3-d]pyrimidin-4-amines 12. Compounds 12 were identical to the products obtained from reactions of 4-chloro-7-(4-fluorophenyl)-5-p-tolyl-7H-pyrrolo[2,3-d]pyrimidine 11 with methyl- or ethylamine in the presence of a catalyst. The thione 13 and its related 4-methylthio- and 4-ylcarbonothioate derivatives 14a, 14b were obtained. The triazolo- 17a–17e, benzenesulfonamido- 19, and tetrazolopyrrolopyrimidine 21 derivatives were synthesized. Several examples of the synthesized pyrrole- and pyrrolo[2,3-d]pyrimidine derivatives showed high to remarkable antioxidant scavenging activity as measured by their ability to scavenge the 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical
新的2-氨基-3-氰基吡咯衍生物已经制备并转化为7-去氮嘌呤。7-去氮腺嘌呤6通过不同方法合成,并与碘化烷基烷基化,得到季铵化的3-烷基吡咯嘧啶碘盐8。后一类盐被去季铵化为N-烷基吡咯[2,3-d]嘧啶-4-胺12。化合物12与在催化剂存在下的甲基或乙基胺反应得到的产物相同,该反应是通过4-氯-7-(4-氟苯基)-5-p-甲苯基-7H-吡咯[2,3-d]嘧啶11进行的。已获得硫醚13及其相关的4-甲硫基和4-硫代羰基酸酯衍生物14a,14b。三唑-17a-17e,苯磺酰胺-19和四唑吡咯嘧啶-21衍生物已合成。合成的吡咯和吡咯[2,3-d]嘧啶衍生物的几个例子表现出高至显著的抗氧化清除活性,通过它们清除1,1-二苯基-2-苯基亚硝基苯肼(DPPH)自由基的能力进行测量。