快速获得多取代的嘧啶并[4,5- b ] [1,4]二氮杂-2,4,6-三酮和嘧啶并[4,5- b ] [1,4]二氮杂-2,4-二酮用于药物发现的新型多功能支架
摘要:
以一种有效的策略合成了一种新型的嘧啶并[4,5- b ] [1,4]二氮杂-2,4,6-三酮。特别是,用Na 2 S 2 O 4进行一锅串联还原-环化反应可促进关键中间体2,4-二甲氧基嘧啶[4,5- b ] [1,4]二氮杂6-1 。随后,用LiAlH 4还原内酰胺6得到嘧啶二氮杂卓的更灵活的支架。合成策略是通用的,因为它促进了在嘧啶二氮卓在三个位置上的顺序功能化。因此,开发了一种快速制备多取代的嘧啶并[4,5- b ] [1,4]二氮杂s的简便有效的方法。
The invention is related to compounds of Formula (I), (II), or (III):
or a pharmaceutically acceptable salt, solvate, ester, and/or phosphonate thereof, compositions containing such compounds, and therapeutic methods that include the administration of such compounds.
Design, Synthesis, and Evaluation of 9-<scp>d</scp>-Ribitylamino-1,3,7,9-tetrahydro-2,6,8-purinetriones Bearing Alkyl Phosphate and α,α-Difluorophosphonate Substituents as Inhibitors of Riboflavin Synthase and Lumazine Synthase
consistent with the observed increase in Km of the 3,4-dihydroxybutanone-4-phosphate substrate from 5.2 μM in Tris buffer or from 6.7 μM in MOPS buffer to 50 μM in phosphate buffer when tested on Bacillus subtilis lumazine synthase. However, when tested in Tris buffer vs Mycobacterium tuberculosis lumazine synthase, three of the phosphate inhibitors displayed inhibition constants in the 4−5 nM range
Lumazine合酶和核黄素合酶催化核黄素的生物合成中的最后两个步骤,核黄素是电子传输过程中必需的代谢产物。为了获得这两种酶的结构探针,以及作为抗生素具有潜在价值的抑制剂,合成了一系列带有烷基磷酸酯和α,α-二氟膦酸酯取代基的核嘌呤嘌呤三酮。由于嘌呤三酮环系统和核糖基羟基可被烷基化,因此在进行所需的烷基化反应之前,合成需要以保护形式生成这两个部分。这些物质被设计为会与其磷酸结合位点结合的鲁那嗪合酶的中间类似物抑制剂。发现所有化合物都是这两种化合物的有效抑制剂。枯草芽孢杆菌lumazine合酶以及大肠杆菌核黄素合酶。3-(1,3,7,9-四氢-9- d -ribityl-2,6,8-三氧嘌呤-7-基)丙烷1-磷酸结合的分子模型为这些化合物的结构提供了结构解释能够有效抑制两种酶。有趣的是,与母体嘌呤三酮相比,这些新化合物的酶动力学出乎意料地证明了磷酸酯和膦酸酯取代基对结合起了负面作用。这些对l
Design, Synthesis, and Evaluation of Acyclic <i>C-</i>Nucleoside and <i>N</i>-Methylated Derivatives of the Ribitylaminopyrimidine Substrate of Lumazine Synthase as Potential Enzyme Inhibitors and Mechanistic Probes
abolished the affinity for lumazine synthase, thus revealing a critical, yet unexplained, role of the ribitylamino N−H moiety in conferring affinity for the enzyme. In contrast, the N−CH3 replacement resulted in an inhibitor of both lumazine synthase and riboflavin synthase. Replacement of the ribitylamino N−H moiety with epimeric C−F moieties led to inhibition of lumazine synthase and riboflavin synthase
Pyrrolo[2, 3-d]pyrimidines and pyrrolo[3, 2-d]pyrimidines were synthesized in high yields by the palladiumcatalyzed reaction of 4-acetylamino-5-bromopyrimidines and 5-acetylamino-4-iodopyrimidines with (Z)-1-ethoxy-2-(tributylstannyl)ethene followed by cyclization under acidic conditions.
The invention is related to compounds of Formula (I), (II), or (III); or a pharmaceutically acceptable salt, solvate, ester, and/or phosphonate thereof, compositions containing such compounds, and therapeutic methods that include the administration of such compounds.