Chemoselective hydrogenation of nitrobenzyl ethers to aminobenzyl ethers catalyzed by palladium–nickel bimetallic nanoparticles
摘要:
A highly efficient and chemoselective hydrogenation of nitrobenzyl ethers to aminobenzyl ethers was developed by using a novel palladium nickel bimetallic nanocatalyst. Since the catalytic selectivity was resulted from the synergistic effects between two metals rather than the traditional catalyst poisons, the hydrogenation proceeded smoothly under additive-free conditions. Thus, the work-up procedure was as simple as to recover the catalyst by a magnetic separation and then to evaporate the solvent. (C) 2015 Elsevier Ltd. All rights reserved.
ALPHA-ARYLMETHOXYACRYLATE DERIVATIVE, PREPARATION METHOD THEREOF, AND PHARMACEUTICAL COMPOSITION CONTAINING SAME
申请人:Kim Se-Won
公开号:US20120149707A1
公开(公告)日:2012-06-14
The present invention relates to an alpha-arylmethoxyacrylate derivative, a preparation method thereof and a pharmaceutical composition comprising the same, and the alpha-arylmethoxyacrylate derivative is inhibitory of HIF, which plays an important role in the regulation of genes associated with energy metabolism, vasomotion, angiogenesis and apoptosis and in the response of cells under hypoxic conditions, so that it can be used for preventing or treating of diseases such as cancer, arthritis, psoriasis, diabetic retinopathy and macular degeneration.
Convenient preparations of t-butyl esters and ethers from t-butanol
作者:Stephen W. Wright、David L. Hageman、Ann S. Wright、Lester D. McClure
DOI:10.1016/s0040-4039(97)01792-9
日期:1997.10
A one-pot preparation of t-butylesters and ethers is described that proceeds from the carboxylic acid or alcohol and t-butanol using only anhydrous magnesium sulfate and catalytic sulfuric acid as additional reagents. The method affords t-butylesters and ethers in good yields and is applicable to a variety of substrates.
A new method for the preparation of tert-butylethers is described starting from aryl aldehyde and ketone tosylhydrazones under Bamford-Stevens reaction conditions (t-BuOK/t-BuOH).