Dichloroimidazolidinedione-Activated Beckmann Rearrangement of Ketoximes for Accessing Amides and Lactams
作者:Yu Gao、Jingjing Liu、Zhenjiang Li、Tianfo Guo、Songquan Xu、Hui Zhu、Fulan Wei、Siming Chen、Hailemariam Gebru、Kai Guo
DOI:10.1021/acs.joc.7b02983
日期:2018.2.16
A novel protocol for the activation of the Beckmann rearrangement utilizing the readily available and economical geminal dichloroimidazolidinediones (DCIDs) on a substoichiometric scale (10 mol %) has been developed. A unique self-propagating mechanism for the substoichiometric dichloroimidazolidinedione-activated transformation was proposed and validated. The substrate scope of the developed protocol
已经开发了一种新的方案,用于以亚化学计量级(10 mol%)利用容易获得且经济的双氯二咪唑烷二酮(DCID)激活贝克曼重排。提出并验证了亚化学计量的二氯咪唑烷二酮激活的转化的独特的自我传播机制。已开发的方案的底物范围已通过23个实例证明,其在短时间内(最多10-30分钟)具有良好至极佳的收率(最多90-98%),包括用于合成尼龙12单体和丙烯酸酯的底物。制备规模的复杂类固醇底物。