Novel compounds and compositions as protease inhibitors
申请人:——
公开号:US20020052378A1
公开(公告)日:2002-05-02
The present invention relates to novel cysteine protease inhibitors of Formula I:
1
the pharmaceutically acceptable salts and N-oxide derivatives thereof, their use as therapeutic agents and methods of making them.
Rh(I)–Bisphosphine-Catalyzed Asymmetric, Intermolecular Hydroheteroarylation of α-Substituted Acrylate Derivatives
作者:Claire M. Filloux、Tomislav Rovis
DOI:10.1021/ja511445x
日期:2015.1.14
Asymmetric hydroheteroarylation of alkenes represents a convenient entry to elaborated heterocyclic motifs. While chiral acids are known to mediate asymmetric addition of electron-rich heteroarenes to Michael acceptors, very few methods exploit transitionmetals to catalyzealkylation of heterocycles with olefins via a C–H activation, migratory insertion sequence. Herein, we describe the development
烯烃的不对称氢杂芳基化代表了复杂杂环基序的便捷进入。虽然已知手性酸可以介导富电子杂芳烃向 Michael 受体的不对称加成,但很少有方法利用过渡金属通过 C-H 活化、迁移插入序列催化杂环与烯烃的烷基化。在此,我们描述了α-取代丙烯酸酯与苯并恶唑的不对称分子间氢杂芳基化反应的发展。该反应以中等至优异的产率和良好至优异的对映选择性提供2-取代的苯并恶唑。值得注意的是,一系列机制研究似乎与涉及 Rh(I)-烯醇化物对映选择性质子化的途径相矛盾,尽管事实上在芳基硼酸与甲基丙烯酸酯衍生物的相关加成中几乎一致地调用了这种机制。相反,有证据表明,迁移插入或β-氢化物消除具有对映决定性,Rh(I)-烯醇化物异构化为Rh(I)-杂苄基物质可将所得的α-立构中心与差向异构化隔离开来。庞大的配体 CTH-(R)-Xylyl-P-Phos 对于反应性和对映选择性至关重要,因为它可能会阻止苯并恶唑底物或中间体与循
Combined Thallium-201 and Dynamic Iodine-123 Iodophenylpentadecanoic Acid Single-Photon Emission Computed Tomography in Patients after Acute Myocardial Infarction with Effective Reperfusion
作者:Wolf-S. Richter、Michael Cordes、Torsten Schuppenhauer、Dieter L. Munz、Stephan Beckmann、Michael Schartl
DOI:10.1002/clc.4960231210
日期:2000.12
expected during ischemia and reperfusion. In ischemic myocardium, the oxidative degradation of carbohydrates is shifted toward the anaerobic production of lactate and the oxidation of fatty acids is suppressed. HYPOTHESIS The aim of this study was to examine the uptake and metabolism of iodine-123 (123I) iodophenylpentadecanoicacid (IPPA) in stunned myocardium. METHODS In 15 patients, SPECT with 201Tl and
Theoretical investigation of the reaction of dialkylzincs with α-alkoxycarbonyl radicals. Evaluation of α-bromoacrylates as radical acceptors in radical-polar crossover processes
作者:François Vibert、Julien Maury、Hugo Lingua、Eric Besson、Didier Siri、Michèle P. Bertrand、Laurence Feray
DOI:10.1016/j.tet.2015.09.045
日期:2015.11
The evaluation of ethyl α-bromoacrylate as radical acceptor in dialkylzinc radical-polar cascades addresses the question of the parameters controlling homolyticsubstitution at zinc by α-alcoxycarbonyl radicals. Under non-degassed medium ethyl α-bromoacrylate reacts with diethylzinc to give a bromocyclopropane. The reaction involves successively radical addition, SH2 at zinc, conjugate addition of
Klebsiellapneumoniae (NBRC 3319) Mediated Asymmetric Reduction of α-Substituted β-Oxo Esters and Its Application to the Enantioiselective Synthesis of Small-Ring Carbocycle Derivatives
作者:Rajib Bhuniya、Tridib Mahapatra、Samik Nanda
DOI:10.1002/ejoc.201101695
日期:2012.3
Ketoreductases from Klebsiella pneumoniae (NBRC3319) selectively reduce several 2-substituted ethyl 3-oxobutyrates to yield the corresponding syn-β-hydroxy esters with remarkable stereocontrol (de > 99 %, ee > 99 %). The enantiopure hydroxy oxo esters were synthetically manipulated to access new small-ringcarbocycles.