Application of poly(vinylphenyltrimethylammonium tribromide) resin as an efficient polymeric brominating agent in the <b>α</b>-bromination and <b>α</b>-bromoacetalization of acetophenones
作者:Bingbing Han、Zubiao Zheng、Dongcheng Zheng、Lei Zhang、Peng Cui、Jianjun Shi、Changjiang Li
DOI:10.1080/00397911.2019.1631348
日期:2019.10.2
Abstract The applications of a new supported tribromide reagent based on poly(vinylbenzyltrimethylammonium hydroxide) resin (Amberlite 717) were reported. This supported tribromide resin was used directly in α-bromination and α-bromoacetalization of acetophenones without any other catalyst under mild conditions. The effects of solvents and the amount of the supported tribromide resin on the reactions
A new process that could directly prepare α-haloacetal of ketones from various ketones with N-halosuccinimide (NBS/NCS) and ethylene glycol in one step without any other catalysts was reported. The effects of solvents, NBS/NCS and reaction temperature were investigated. Under the optimal condition, most of α-haloacetals of ketones were obtained in 90–100% yield.
Heme Oxygenase Inhibition by 1-Aryl-2-(1H-imidazol-1-yl/1H-1,2,4-triazol-1-yl)ethanones and Their Derivatives
作者:Gheorghe Roman、Jason Z. Vlahakis、Dragic Vukomanovic、Kanji Nakatsu、Walter A. Szarek
DOI:10.1002/cmdc.201000120
日期:2010.9.3
been concerned with the design of selective inhibitors of heme oxygenases (HO‐1 and HO‐2). The majority of these were based on a four‐carbon linkage of an azole, usually an imidazole, and an aromatic moiety. In the present study, we designed and synthesized a series of inhibition candidates containing a shorter linkage between these groups, specifically, a series of 1‐aryl‐2‐(1H‐imidazol‐1‐yl/1H‐1