Fe-Catalyzed Reductive Couplings of Terminal (Hetero)Aryl Alkenes and Alkyl Halides under Aqueous Micellar Conditions
作者:Haobo Pang、Ye Wang、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1021/jacs.9b04510
日期:2019.10.30
aromatic or heteroaromatic and an alkyl bromide or iodide leads, in the presence of Zn and a catalytic amount of an Fe(II) salt, to a net reductive coupling. The new C-C bond is regiospecifically formed at rt at the -site of the al-kene. The coupling only occurs in an aqueous micellar medium, where an atypical carbanionic, as opposed to radical, process is likely, supported by several control experiments
在Zn和催化量的Fe(II)盐的存在下,乙烯基取代的芳族或杂芳族和烷基溴或碘的组合导致净还原偶联。新的 CC 键在 rt 在烯烃的 位点区域特异性地形成。偶联仅发生在水性胶束介质中,其中可能是非典型的碳负离子过程,而不是自由基过程,这得到了几个控制实验的支持。提出了一种基于这些数据的机制。
Transition metal complexes of N-heterocyclic carbenes, method of preparation and use in transition metal catalyzed organic transformations
申请人:Organ G. Michael
公开号:US20070073055A1
公开(公告)日:2007-03-29
The present invention relates to catalysts of transition metal complexes of N-heterocyclic carbenes, their methods of preparation and their use in chemical synthesis. The synthesis, ease-of-use, and activity of the compounds of the present invention are substantial improvements over in situ catalyst generation. Further, the transition metal complexes of N-heterocyclic carbenes of the present invention may be used as precatalysts in metal-catalyzed cross-coupling reactions.