A New Series of 3-Alkyl Phosphate Derivatives of 4,5,6,7-Tetrahydro-1-<scp>d</scp>-ribityl-1<i>H</i>-pyrazolo[3,4-<i>d</i>]pyrimidinedione as Inhibitors of Lumazine Synthase: Design, Synthesis, and Evaluation
作者:Yanlei Zhang、Guangyi Jin、Boris Illarionov、Adelbert Bacher、Markus Fischer、Mark Cushman
DOI:10.1021/jo070982r
日期:2007.9.1
hypothetical intermediate in the lumazine synthase-catalyzed reaction were synthesized and evaluated as lumazine synthase inhibitors. The key steps of the synthesis were C-5 deprotonation of 4-chloro-2,6-dimethoxypyrimidine, acylation of the resulting anion, and conversion of the product to a pyrazolopyrimidine with hydrazine. Alkylation of the pyrazolopyrimidine with a substituted ribityl iodide and
Lumazine合酶催化核黄素生物合成中的倒数第二个步骤。合成了在LUM嗪合酶催化的反应中的假定中间体的三个系列的吡唑并嘧啶类似物的同源系列,并评价为LUM嗪合酶抑制剂。合成的关键步骤是4-氯-2,6-二甲氧基嘧啶的C-5脱质子化,所得阴离子的酰化作用以及产物与肼的转化为吡唑并嘧啶。吡唑并嘧啶与取代的碘化碘化物的烷基化和核糖链的脱保护得到了最终的三种产物。这三种化合物都是结核分枝杆菌,稻瘟病菌,白色念珠菌的鲁嗪合酶的极强抑制剂。,和粟酒裂殖酵母(Schizosaccharomyces pombe lumazine)合酶,其抑制常数在低纳摩尔至亚纳摩尔范围内。结合至结核分枝杆菌lumazine合酶的同系物之一的分子模型表明,lumazine合酶催化的反应途径中的假设中间体与代谢稳定的类似物均相似地结合。