Sonochemical cycloadditions of o-quinones. The search for a cation radical pathway
作者:Martı́n Avalos、Reyes Babiano、José L Bravo、Noemı́ Cabello、Pedro Cintas、Michael B Hursthouse、José L Jiménez、Mark E Light、Juan C Palacios
DOI:10.1016/s0040-4039(00)00578-5
日期:2000.5
Diels–Alder cycloadditions of an o-quinone monoketal with different furans, under argon, are considerably accelerated by ultrasonic irradiation. Moreover, these sonochemical reactions are regiospecific and proceed with a high diastereoselectivity. The results can be ascribed to the chemical role of ultrasounds which may favor a single electron transfer mechanism with respect to ionic or nonpolar pathways
在氩气下,具有不同呋喃的邻醌单缩酮的Diels-Alder环加成反应可通过超声辐照大大加速。而且,这些声化学反应是区域特异性的,并且以高非对映选择性进行。结果可以归因于超声的化学作用,其相对于离子或非极性途径可能有利于单一电子转移机制。