Sterically Directed Iridium-Catalyzed Hydrosilylation of Alkenes in the Presence of Alkynes
作者:Jill A. Muchnij、Farai B. Kwaramba、Ronald J. Rahaim
DOI:10.1021/ol5000549
日期:2014.3.7
A selective iridium catalyzed hydrosilylation of alkenes in the presence of more reactive alkynes is described. By utilizing [IrCl(COD)]2 in the presence of excess COD, hydrosilylation of alkenes and alkynes with ethynylsilanes is achieved with good chemo- and regioselectivity. This approach goes against the traditional reactivity trends of platinum and rhodium catalysts and allows access to highly
Lanthanum Ate Amide-Catalyzed Regio- and Stereoselective Hydrosilylation of Internal Alkynes
作者:Xiaoming Xu、Ailin Gao、Wufeng Chen、Xiufang Xu、Jianfeng Li、Chunming Cui
DOI:10.1021/acscatal.2c06100
日期:2023.3.17
synthetic intermediates to substituted alkenes and silicon materials and can be directly obtained by the catalytic selective hydrosilylation of alkynes. In this Letter, the catalytic selective α-syn-hydrosilylation of both aryl- and silyl-substituted internal alkynes is described with an ene-diamido rare-earth ate complex as a catalyst. The reaction resulted in the selective formation of trisubstituted silylalkenes
硅烷烯烃是取代烯烃和硅材料的重要合成中间体,可通过炔烃的催化选择性氢化硅烷化反应直接获得。在这封信中,描述了用烯-二氨基稀土酸盐络合物作为催化剂的芳基和甲硅烷基取代的内部炔烃的催化选择性 α-顺式-氢化硅烷化。该反应导致选择性形成三取代的甲硅烷基烯烃,包括孪生二甲硅烷基烯烃。动力学研究和 DFT 计算揭示了镧催化剂的 ate 结构对高反应活性的关键作用。
Zinc-Catalyzed Silylation of Terminal Alkynes
作者:Ronald J. Rahaim、Jared T. Shaw
DOI:10.1021/jo702557d
日期:2008.4.1
A rapid and high-yielding silylation of terminal alkynes employing TMSOTf and catalytic quantities of Zn(OTf)(2) has been developed. The reaction works well for a variety of substrates including reactive esters. Fifteen examples with yields of > 90% are reported.