Selective C-C bonds formation, N-alkylation and benzo[d]imidazoles synthesis by a recyclable zinc composite
作者:Guanxin Zhu、Zheng-Chao Duan、Haiyan Zhu、Dongdong Ye、Dawei Wang
DOI:10.1016/j.cclet.2021.06.060
日期:2022.1
reaction, dehydrogenation and heterocycles synthesis, instead of noble metals. The uniformly dispersed zinc composites were designed, synthesized and carefully characterized by means of XPS, EDS, TEM and XRD. The resulting zinc composite showed good catalytic activity for the N-alkylation of amines with amines, ketones with alcohols in water under base-free conditions, while unsaturated carbonyl compounds
Tunable Triazole-Phosphine-Copper Catalysts for the Synthesis of 2-Aryl-1<i>H</i>
-benzo[d]imidazoles from Benzyl Alcohols and Diamines by Acceptorless Dehydrogenation and Borrowing Hydrogen Reactions
作者:Zhaojun Xu、Duo-Sheng Wang、Xiaoli Yu、Yongchun Yang、Dawei Wang
DOI:10.1002/adsc.201700179
日期:2017.10.4
activity. Mechanistic studies and deuterium labeling experiments indicated that the reactions proceeded by an initial and reversible alcohol dehydrogenation resulting in a copper hydride intermediate. This was also supported by the direct observation of a diagnostic copper hydride signal by solid‐state infrared spectroscopy. The TAP−Cu‐H complex showed absorptions at 912 cm−1 that could be assigned
三唑-膦-铜配合物(TAP-Cu)已被合成并用作可调谐和有效的催化剂,用于选择性合成氟代2-芳基-1 H-苯并[d]咪唑和1-苄基-2-芳基1小时一步法制得的简单醇中的苯并[d]咪唑衍生物。TAP-Cu对脱氢和借用氢反应均显示出优异且可调节的催化活性,首次证明了80多个例子。观察到配体在催化剂活性中起关键作用。机理研究和氘标记实验表明,反应是通过初始且可逆的醇脱氢进行的,从而生成氢化铜中间体。固态红外光谱法直接观察氢化铜诊断信号也支持了这一点。TAP-Cu-H络合物在912 cm -1处显示吸收可以分配给氢化铜拉伸。此外,也成功地进行了中间双亚胺的直接捕集。
Simple and Efficient One-Pot Synthesis of 2-Substituted Benzimidazoles from θ-Diaminoarene and Aryl Aldehydes
Abstract An easy and efficient one-pot condensation method for the synthesis of substituted benzimidazolesfrom θ-phenylenediamines with aryl aldehydes using urea hydrogen peroxide (UHP) and I2 in dimethylsulfoxide (DMSO) provides wide substrate scope with good to excellent yields and simple and quick isolation of the products. GRAPHICAL ABSTRACT
Synthesis, In Vitro and In Silico NS5B Polymerase Inhibitory Activity of Benzimidazole Derivatives
作者:Vaishali M. Patil、Gurukumar K. R.、Maksim Chudayeu、Satya Prakash Gupta、Subeer Samanta、Neeraj Masand、Neerja Kaushik-Basu
DOI:10.2174/157340612801216120
日期:2012.6.1
HepatitisC virus (HCV) NS5B polymerase is the key replicating protein of the virus and thus an attractive target for drug development. Here we report on the synthesis and biological evaluation of a new series of benzimidazole derivatives as HCV NS5B inhibitors. This yielded compound 6b and 6d bearing 2-(2-benzyloxy)phenyl and 2-(4- methylbenzyloxy)phenyl moieties, respectively, as promising leads
IMIDAZOLE DERIVATIVES HAVING ARYL PIPERIDINE SUBSTITUENT, METHOD FOR PREPARATION THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING SAME
申请人:Suh Jee Hee
公开号:US20100145054A1
公开(公告)日:2010-06-10
The present invention is directed to a novel imidazole derivative having an aryl piperidine substituent of formula (I) and a method for preparation thereof, and a pharmaceutical composition containing said imidazole derivative as an active ingredient for preventing or treating a MCH (melanine-concentrating hormone)-related disease.