C-H Bond Functionalization with the Formation of a C-C Bond: A Free Radical Condensation Reaction Based on the Phthalimido-<i>N</i>-oxyl Radical
作者:Shradha Patil、Liang Chen、James M. Tanko
DOI:10.1002/ejoc.201301530
日期:2014.1
The development of a new chemical process that effects the conversion RH + C=C–C–X → R–C–C=C + HX, in which X is the phthalimido-N-oxyl radical (PINO·), is reported. The reaction yields are high, mass balances are excellent, and C–H bond functionalization and C–C bond formation are achieved in a single transformation. The byproduct of the reaction, N-hydroxyphthalimide, precipitates from solution and
报道了一种影响转化 RH + C=C–C–X → R–C–C=C + HX 的新化学过程的开发,其中 X 是邻苯二甲酰亚胺-N-氧基自由基 (PINO·)。反应产率高,质量平衡良好,C-H 键官能化和 C-C 键形成在一次转化中实现。反应的副产物 N-羟基邻苯二甲酰亚胺从溶液中沉淀出来,可以通过简单的过滤轻松去除(并回收)。动力学链长度更短,反应时间更长(相对于烯丙基溴的类似反应),这很可能是因为 PINO· 是一种反应性较低的氢原子吸收剂。添加-消除步骤的效率似乎没有显着差异。竞争实验表明,Br·和PINO·的离群能力相当。