Carbon-Sulfur Bond Formation of Challenging Substrates at Low Temperature by Using Pd-PEPPSI-IPent
作者:Mahmoud Sayah、Michael G. Organ
DOI:10.1002/chem.201102158
日期:2011.10.10
bromides and chlorides has been achieved under the most mild temperatures yet reported (i.e., room temperature to 40 °C). The bulk afforded by the di‐2,6‐(3‐propylphenyl)imidazolium‐derived Pd‐PEPPSI‐IPent catalyst is believed to actively promote the critical reductive elimination step of the catalytic cycle, thereby eliminating the formation of poisonous off‐cycle dimeric resting states that have plagued
芳基硫醇变得又快又快:在迄今报道的最温和的温度下(即室温至40°C),已实现了烷基,芳基和甲硅烷基硫醇与受阻,失活的芳基溴化物和氯化物的偶联。据信由二-2-(6-(3-丙基苯基)咪唑鎓)衍生的Pd-PEPPSI-IPent催化剂提供的大部分可积极促进催化循环的关键还原消除步骤,从而消除有毒的非循环二聚体的形成。静止状态困扰着Pd催化的硫化反应。