高铁酸盐在有机氧化合成上的应用

高铁酸盐在酸性介质中是强氧化剂 ,在碱性介质中是弱氧化剂 ,通过控制反应酸度可调节其氧化性能本文系统地研究了反应条件 (溶剂、温度、酸度、相转移催化剂类型等 )对氧化反应及产物的影响。结果显示 :高铁酸盐是一种用途广泛的氧化剂 ,反应条件温和 。

Robust cobalt oxide catalysts for controllable hydrogenation of carboxylic acids to alcohols

The selective catalytic hydrogenation of carboxylic acids is an important process for alcohol production,while efficient heterogeneous catalyst systems are still being explored.Here,we report the selective hydrogenation of carboxylic acids using earth‐abundant cobalt oxides through a reaction‐controlled catalysis process.The further reaction of the alcohols is completely hindered by the presence of carboxylic acids in the reaction system.The partial reduction of cobalt oxides by hydrogen at designated temperatures can dramatically enhance the catalytic activity of pristine samples.A wide range of carboxylic acids with a variety of functional groups can be converted to the corresponding alcohols at a yield level applicable to large‐scale production.Cobalt monoxide was established as the preferred active phase for the selective hydrogenation of carboxylic acids.