Synthesis of novel potent hepatitis C virus NS3 protease inhibitors: Discovery of 4-hydroxy-cyclopent-2-ene-1,2-dicarboxylic acid as a N-acyl-l-hydroxyproline bioisostere
摘要:
Potent tetrapeptidic inhibitors of the HCV NS3 protease have been developed incorporating 4-hydroxy-cyclopent-2-ene-1,2-dicarboxylic acid as a new N-acyl-L-hydroxyproline mimic. The hydroxycyclopentene template was synthesized in eight steps from commercially available, (syn)-tetrahydrophthalic anhydride. Three different amino acids were explored in the PI-position and in the P2-position the hydroxyl group of the cyclopentene template was substituted with 7-methoxy-2-phenyl-quinolin-4-ol. The P3/P4-positions were then optimized from a set of six amino acid derivatives. All inhibitors were evaluated in an in vitro assay using the full-length NS3 protease. Several potent inhibitors were identified, the most promising exhibiting a K-i value of 1.1 nM. (c) 2006 Elsevier Ltd. All rights reserved.
先前的研究表明,Fe II /α-酮戊二酸依赖性双加氧酶AsqJ诱导构巢曲霉在viridicatin生物合成中的骨架重排,从苯并[1,4]二氮杂-2,5-二酮底物生成喹诺酮骨架。我们报告说,仅通过改变苯并二氮杂二酮底物中的取代基,AsqJ即可催化另外的,完全不同的反应。通过底物筛选,功能探针的应用和计算分析来建立这种新机制。AsqJ消费税H 2由合适的苯并[1,4]二氮杂-2-5,5-二酮底物的杂环结构生成CO,生成喹唑啉酮。这种新颖的AsqJ催化途径由复杂底物中的单个取代基控制。AsqJ的这种独特的底物定向反应性可实现喹诺酮或喹唑啉酮的靶向生物催化生成,喹诺酮或喹唑啉酮是两种具有特殊生物医学相关性的生物碱框架。
[EN] METHOD FOR PRODUCING PEPTIDE COMPOUND CONTAINING N-SUBSTITUTED-AMINO ACID RESIDUE<br/>[FR] PROCÉDÉ DE PRODUCTION D'UN COMPOSÉ PEPTIDIQUE CONTENANT UN RÉSIDU D'ACIDE AMINÉ N-SUBSTITUÉ<br/>[JA] N-置換-アミノ酸残基を含むペプチド化合物の製造方法