Sulfuric acid catalyzed addition of β-dicarbonyl compounds to alcohols under conventional heating and microwave-assisted conditions
作者:Fei Xia、Zheng Le Zhao、Pei Nian Liu
DOI:10.1016/j.tetlet.2012.03.104
日期:2012.6
The highlyefficient direct addition of β-dicarbonylcompounds to secondaryalcohols has been achieved using one of the cheapest acids, H2SO4, as the catalyst. For a series of β-dicarbonylcompounds and various secondaryalcohols, the addition reactions all complete in 5 min with high yields both under the conventional heating condition and under the microwave heating condition. The comparison of the
使用最便宜的酸之一H 2 SO 4作为催化剂,已经实现了将β-二羰基化合物高效直接加成到仲醇中。对于一系列β-二羰基化合物和各种仲醇,在常规加热条件下和微波加热条件下,加成反应均在5分钟内完成,且收率很高。从微波加热条件获得的结果与从常规加热条件获得的结果的比较表明,在微波辅助的加成反应中不存在明显的特定或非热微波效应。
Highly Efficient Microwave-Assisted Substitution of β-Dicarbonyl Compounds with Secondary Alcohols Using Fluoroboric Acid as the Catalyst
作者:Peinian Liu、Fei Xia、Yujie Ren、Junqina Chen
DOI:10.1002/cjoc.201180359
日期:2011.10
The microwave‐assisted substitution of β‐dicarbonyl compounds with secondaryalcohols has been achieved efficiently, using very cheap fluoroboricacid (HBF4) as the catalyst. For various β‐dicarbonyl compounds and a series of secondaryalcohols, the direct substitution gives high yields after only 5 min of microwave irradiation.