Cycloaddition Reactions of Thiazolium Azomethine Ylides: Application to Pyrrolo[2,1-<i>b</i>]thiazoles
作者:Craig R. Berry、Craig A. Zificsak、Alan C. Gibbs、Dennis J. Hlasta
DOI:10.1021/ol071229n
日期:2007.10.1
Thiazolium azomethineylides, equipped with a C-2 methanethiol group, participate in an efficient [3 + 2] cycloaddition reaction with acetylene derivatives to yield unique pyrrolo[2,1-b]thiazoles. The elimination of the methanethiol leaving group from the cycloadduct has replaced the need for a separate oxidation step and suppresses ring-opening side reactions. Products were obtained in short synthetic
[EN] NITROGEN-CONTAINING HETEROCYCLIC DERIVATIVE, AND PREPARATION METHOD THEREFOR AND MEDICAL APPLICATION THEREOF<br/>[FR] DÉRIVÉ HÉTÉROCYCLIQUE AZOTÉ, SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION MÉDICALE<br/>[ZH] 含氮杂环类衍生物、其制备方法及其在医药上的应用
cross-coupling reaction between (hetero)aryl boronic esters and arylsulfides was explored, of which universality was exemplified with thirty small molecules and twelve alternating conjugated polymers. Mechanism studies revealed the importance of room temperature and anhydrous condition in reducing the homocoupling defects and enhancing the optoelectronic properties of the conjugated polymers.
Discovery of a 4-Azetidinyl-1-thiazoyl-cyclohexane CCR2 Antagonist as a Development Candidate
作者:Xuqing Zhang、Cuifen Hou、Heather Hufnagel、Monica Singer、Evan Opas、Sandra McKenney、Dana Johnson、Zhihua Sui
DOI:10.1021/ml300260s
日期:2012.12.13
We have discovered a novel series of 4-azetidiny1-1-aryl-cyclohexanes as CCR2 antagonists. Divergent SAR studies on hCCR2 and hERG activities led to the discovery of compound 8d, which displayed good hCCR2 binding affinity (IC50, 37 nM) and potent functional antagonism (chemotaxis IC50, 30 nM). It presented an IC50 of >50 mu M in inhibition of the hERG channel and had no effect on the QTc interval up to 10 mg/kg (i.v.) in anesthetized guinea pig and dog CV studies. It also displayed high selectivity over other chemokine receptors and GPCRs, and amendable oral bioavailability in dogs and primates. In a thioglycollate-induced inflammation model in hCCR2KI mice, it had ED50 of 3 mg/kg on inhibition of the influx of leukocytes, monocytes/macrophages, and T-lymphocytes.