Synthesis, Properties, and NAD<sup>+</sup>-NADH-Type Redox Ability of 14-Substituted 1,3-Dimethyl-5,10-methanocycloundeca[4,5]pyrrolo[2,3-<i>d</i>]pyrimidine-2,4(1,3<i>H</i>)-dionylium Tetrafluoroborates and Their Hydride Adducts
作者:Kazuhiro Igarashi、Yohei Yamaguchi、Yuhki Mitsumoto、Shin-ichi Naya、Makoto Nitta
DOI:10.1021/jo052495m
日期:2006.3.31
A synthesis of 14-substituted 1,3-dimethyl-5,10-methanocycloundeca[4,5]pyrrolo[2,3-d]pyrimidine-2,4(1,3H)-dionylium tetrafluoroborates 11a,b+·BF4- was accomplished by the methylation of 5,10-methanocycloundeca[4,5]pyrrolo[2,3-d]pyrimidine-2,4(1,3H)-dione derivatives with MeI and following anion-exchange reaction by treatment with 42% aq HBF4. Compound 11b+·BF4- was synthesized alternatively by the
14-取代的1,3-二甲基-5,10-甲基环己酮[4,5]吡咯并[2,3 - d ]嘧啶-2,4(1,3 H)-二氟四氟硼酸酯11a,b +的合成· BF 4 -通过用MeI甲基化5,10-甲基环己酮[4,5]吡咯并[2,3- d ]嘧啶-2,4(1,3 H)-二酮衍生物并通过42处理阴离子交换反应来完成%HBF水溶液4。化合物11b +· BF 4 -交替地通过1,6-甲基[11]亚萘基四氟硼酸与6-苯基氨基-1,3-二甲基尿嘧啶的反应和随后的氧化环化反应合成。11a,b +的显着结构特征在检查UV-vis和NMR光谱数据以及X射线晶体分析时得到澄清。阳离子11a,b +的稳定性用分光光度法测定的p K R +值表示为9.8和9.7,分别比相应的七元环阳离子小1.4和1.2个pH单位。但是,该值比母体1,6-甲基[11]环烯基鎓离子的pH值大3.6和3.5个pH单位(p K R + = 6