Novel molecular iodine catalyzed cyclization reactions of 2-amino anilines with aryl alkyl ketones under oxidant and metal-free conditions are described. The reaction likely involves sequential C–N bond formation followed by C(CO)–C(alkyl) bondcleavage. Various 2-substituted benzimidazoles are obtained in moderate to good yields in a single step from readily available acetophenones, propiophenones
Bimetallic Cu–Mn B spinel oxide catalyzed oxidative synthesis of 1,2-disubstituted benzimidazoles from benzyl bromides
作者:Rohit Sharma、Firdoos Ahmad Sofi、Preeti Rana、Prasad V. Bharatam
DOI:10.1039/c8nj05504a
日期:——
Cu–Mn B (a heterogeneous catalyst) catalyzed synthesis of 1-benzyl-2-phenyl-1H-benzo[d]imidazoles is reported.
报道了Cu-Mn B(一种异质催化剂)催化合成1-苄基-2-苯基-1H-苯并[d]咪唑的方法。
A simple and efficient procedure for the synthesis of benzimidazoles using air as the oxidant
作者:Songnian Lin、Lihu Yang
DOI:10.1016/j.tetlet.2005.04.101
日期:2005.6
Direct one-step synthesis of various benzimidazoles from phenylenediamines and aldehydes is described using air as the oxidant. The salient features of this method include a simpleprocedure, mild conditions, no coupling agents or commercial oxidants/additives used, no waste produced (only by-product being water), easy purification, and high generality.
Synchronous Proton‐Hydride Transfer by a Pyrazole‐Functionalized Protic Mn(I) Complex in Catalytic Alcohol Dehydrogenative Coupling
作者:Subhabrata De、Prabodh Ranjan、Vishal Chaurasia、Sourav Pal、Saikat Pal、Pragati Pandey、Jitendra K. Bera
DOI:10.1002/chem.202301758
日期:2023.10.18
A protic Mn(I) complex featuring pyrazole functionality was evaluated for dehydrogenative coupling reactions to access benzimidazole and quinoline derivatives. Kinetic experiments and DFT calculations reveal that the initial alcohol dehydrogenation step proceeds through a concerted proton and hydride transfers to pyrazolato N and Mn, respectively, on the metal-ligand construct.
对具有吡唑官能团的质子 Mn(I)配合物进行脱氢偶联反应评估,以得到苯并咪唑和喹啉衍生物。动力学实验和 DFT 计算表明,最初的醇脱氢步骤是通过协调的质子和氢化物分别转移到金属配体结构上的吡唑根 N 和 Mn 来进行的。
[EN] V-ATPASE ACTIVITY INHIBITOR, ANTIBACTERIAL AGENT, MEDICINE, ANTIBACTERIAL METHOD AND SCREENING METHOD<br/>[FR] INHIBITEUR DE L'ACTIVITÉ DE LA V-ATPASE, AGENT ANTIBACTÉRIEN, MÉDICAMENT, PROCÉDÉ ANTIBACTÉRIEN ET PROCÉDÉ DE CRIBLAGE<br/>[JA] V-ATPase活性阻害剤、抗菌剤、医薬及び抗菌方法並びにスクリーニング方法