Metal-Free, Radical Addition to Alkenes<i>via</i>Desulfitative Chlorine Atom Transfer
作者:Lidong Cao、Karin Weidner、Philippe Renaud
DOI:10.1002/adsc.201100473
日期:2011.12
An efficient method for radicaladditions to unactivated alkenesvia desulfitative chlorine-atom transfer is described. The reaction is based on the use of readily available sulfonyl chlorides as starting materials and cheap radical initiators such as azobisisobutyronitrile (AIBN), di-tert-butyldiazene (DTBD), and dilauroyl peroxide (DLP). No transition metal catalyst is required and the reaction takes
A half-sandwich 1,2-azaborolyl (Ab) ruthenium complex, (Ab–CCPh)RuCl(PPh3)2 (1), has been synthesized by treating RuCl2(PPh3)3 with lithium 1,2-azaborolide L-1, or by treating either RuCl2(PPh3)3 or RuHCl(PPh3)3 directly with 1,2-azaborole LH-1. It is evaluated as a suitable precatalyst in [2 + 2] cycloadditions of norbornene derivatives with DMAD and in atom transfer radical additions of halogenated compounds with olefins.