Higly efficienthydroarylation and hydroalkylation of styrenes with various arenes and 1,3-dicarbonyl compounds respectively have been developed using Amberlyst-15 as a heterogeneous catalyst. The ...
Efficient Metal-Catalyzed Direct Benzylation and Allylic Alkylation of 2,4-Pentanediones
作者:Magnus Rueping、Boris J. Nachtsheim、Alexander Kuenkel
DOI:10.1021/ol063048b
日期:2007.3.1
[reaction: see text] A highly effective metal-catalyzed benzylation and allylic alkylation of 2,4-pentanediones has been developed. This new bismuth-catalyzed direct carbon-carbon bond forming reaction provides the corresponding monoalkylated dicarbonyl compounds in high yields after short reaction times using the lowest amounts of catalyst (1 mol %) and the free alcohol. In addition, a new route to
Perchloric Acid Catalyzed Homogeneous and Heterogeneous Addition of β-Dicarbonyl Compounds to Alcohols and Alkenes and Investigation of the Mechanism
作者:Pei Nian Liu、Li Dang、Qing Wei Wang、Shu Lei Zhao、Fei Xia、Yu Jie Ren、Xue Qing Gong、Jun Qin Chen
DOI:10.1021/jo100517k
日期:2010.8.6
The direct addition of various β-dicarbonylcompounds to a series of secondary alcohols and alkenes has been achieved using 1 mol % perchloric acid (HClO4) as the catalyst. The HClO4-catalyzed reactions could be conveniently conducted in commercial solvent and gave moderate to excellent yields. Moreover, the silica gel-supported HClO4 could also catalyze the heterogeneous addition for a series of substrates
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。
Cobalt(II) chloride bistriphenylphosphine catalyzed alkylations of β-dicarbonyl compounds
作者:A. González、J. Marquet、M. Moreno-Mañas
DOI:10.1016/s0040-4039(00)80327-5
日期:1988.1
The alkylation of β-dicarbonyl compounds with several benzylhalides in chloroform and in the presence of potassium carbonate is accelerated by the presence of cobalt(II) chloride bistriphenylphosphine, thus broadening the scope of this alkylation method.