Ligand-Promoted Reactivity of Alkenes in Dehydrogenative Heck Reactions of Furans and Thiophenes
作者:Alexandre Vasseur、Caroline Laugel、Dominique Harakat、Jacques Muzart、Jean Le Bras
DOI:10.1002/ejoc.201403475
日期:2015.2
4,5-Diazafluorenone was found to promote the dehydrogenative Heck reaction of furans and thiophenes with hindered alkenes. High stereoselectivity was achieved in the synthesis of β,β-diaryl α,β-unsaturated alkenes. A mechanism, based on ESI-MS studies, kinetic experiments, and competitive reactions, was proposed. The ligand influences C–H bond activation, insertion of the alkenes, the stereodetermining
发现 4,5-二氮杂芴酮可促进呋喃和噻吩与受阻烯烃的脱氢 Heck 反应。在β,β-二芳基α,β-不饱和烯烃的合成中实现了高立体选择性。提出了一种基于 ESI-MS 研究、动力学实验和竞争反应的机制。配体影响 C-H 键的活化、烯烃的插入、立体确定步骤和催化剂的有氧再生。