Straightforward Functionalization of 3,5-Dichloro-2-pyrazinones under Simultaneous Microwave and Ultrasound Irradiation
作者:Giancarlo Cravotto、Davide Garella、Silvia Tagliapietra、Vaibhav Mehta、Erik Van der Eycken
DOI:10.1055/s-0029-1217065
日期:2010.1
Heck reactions and Suzuki-Miyaura cross-couplings with relatively poorly reactive 3,5-dichloro-2-pyrazinones were studied at the same temperature under conventional heating, dielectric heating (MW) and simultaneous MW/US irradiation. This comparative study showed a synergic effect of combined MW and US irradiation resulting in a much higher reaction yield, at the same time avoiding side reactions and partial degradation that is otherwise observed under conventional heating.
在传统加热、介电加热(MW)和 MW/US 同时辐照的相同温度下,研究了反应性相对较差的 3,5-二氯-2-吡嗪酮的赫克(Heck)反应和苏木-米亚乌拉(Suzuki-Miyaura)交叉耦合反应。这项对比研究表明,MW 和 US 联合辐照可产生协同效应,从而大大提高反应产率,同时避免了在传统加热条件下出现的副反应和部分降解。