Radical cyclisation onto imidazoles and benzimidazoles
摘要:
New synthetic methodology has been developed for the synthesis of [1,2-a]Fused imidazoles and benzimidazoles using intramolecular homolytic aromatic substitution. In the intramolecular substitution, N-(omega-alkyl) radicals are generated using Bu3SnH from N-(omega-phenylselanyl)aIkyl side chains. Phenylselanyl groups are used as radical leaving groups to avoid problems in the N-alkylation of imidazoles and benzimidazoles. Arylsulfones for imidazoles, and phenylsulfides for benzimidazoles, are used as the leaving groups in the homolytic substitutions. (C) 1999 Elsevier Science Ltd. All rights reserved.
Benzimidazoles as Ligands in the Ruthenium-Catalyzed Enantioselective Bifunctional Hydrogenation of Ketones
作者:Jeremy M. Praetorius、Ruiyao Wang、Cathleen M. Crudden
DOI:10.1021/om900897b
日期:2010.2.8
ligands bound to the ruthenium center are active for the mild and chemoselective hydrogenation of ketones in the presence of alkenes. Catalysts that exist as a single diastereomer, prepared with enantiomerically pure diphosphanes, catalyze the hydrogenation of prochiral ketones with moderate levels of enantioselectivity that are significantly improved relative to catalysts existing in several conformations
L = N的一系列Cl 2 Ru(diphosphane)L 2(II)配合物已经合成并表征了通过氮键与金属键合的1-烷基化苯并咪唑。对于1-甲基苯并咪唑,所得络合物以所有可能的构象异构体的统计混合物形式存在。当苯并咪唑上的取代基的大小增加到10时,可以制备出以单一非对映异构体形式存在的络合物。所有具有结合到钌中心的苯并咪唑配体的配合物在烯烃存在下对酮的轻度和化学选择性氢化均具有活性。用对映体纯的二膦制备的以单一非对映异构体形式存在的催化剂以中等对映体选择性催化前手性酮的氢化,相对于以几种构象存在的催化剂,该手性酮的氢化显着提高。
NOVEL COMPOUNDS AS ANTAGONISTS OR INVERSE AGONISTS FOR OPIOID RECEPTORS
申请人:Diaz Caroline Jean
公开号:US20100222345A1
公开(公告)日:2010-09-02
This invention relates to novel compounds which are antagonists or inverse agonists at one or more of the opioid receptors, to pharmaceutical compositions containing them, to processes for their preparation, and to their use in therapy.
First Selective CYP11B1 Inhibitors for the Treatment of Cortisol-Dependent Diseases
作者:Ulrike E. Hille、Christina Zimmer、Carsten A. Vock、Rolf W. Hartmann
DOI:10.1021/ml100071j
日期:2011.1.13
concept, we succeeded in the development of a series of highly active and selectiveinhibitors of CYP11B1, the key enzyme of cortisol biosynthesis, as potential drugs for the treatment of Cushing's syndrome and related diseases. Thus, compound 33 (IC50 = 152 nM) is the first CYP11B1inhibitor showing a rather good selectivity toward the most important steroidogenic CYP enzymes aldosterone synthase (CYP11B2)
1,(3,)5-SUBSTITUTED IMIDAZOLES, THEIR USE IN THE TREATMENT OF HYPERTENSION AND METHODS FOR THEIR PREPARATION
申请人:Matsoukas John
公开号:US20100166837A1
公开(公告)日:2010-07-01
The present invention provides novel 1,5 and 1,3,5-substituted imidazole compounds in hydrophilic or lipophilic form, which are useful as angiotensin II ATI receptor antagonists suitable for transdermal delivery. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing compounds and their use in methods of treating hypertension and cardiovascular diseases.
Influence of Some Novel N-Substituted Azoles and Pyridines on Rat Hepatic CYP3A Activity
作者:James T. Slama、Julie L. Hancock、Taikyun Rho、Lidia Sambucetti、Kenneth A. Bachmann
DOI:10.1016/s0006-2952(98)00096-3
日期:1998.6
A series of N-substituted heteroaromatic compounds structurally related to clotrimazole was synthesized, and the effects of these compounds on ethosuximide clearance in rats were determined as a measure of their abilities to induce cytochrome P4503A (CYP3A) activity. Ethosuximide clearance and in vitro erythromycin N-demethylase activity were shown to correlate. In this series, imidazole or other related