Synthesis of Alkenylboronates from <i>N</i>-Tosylhydrazones through Palladium-Catalyzed Carbene Migratory Insertion
作者:Yifan Ping、Rui Wang、Qianyue Wang、Taiwei Chang、Jingfeng Huo、Ming Lei、Jianbo Wang
DOI:10.1021/jacs.1c02331
日期:2021.7.7
The palladium-catalyzed oxidative borylation reaction of N-tosylhydrazones has been developed. The reaction features mild conditions, broad substratescope, and good functional group tolerance. It thus represents a highly efficient and practical method for the synthesis of di-, tri-, and tetrasubstituted alkenylboronates from readily available N-tosylhydrazones. One-pot Suzuki coupling and other transformations
Synthesis of (<i>Z</i>)-1-Thio- and (<i>Z</i>)-2-Thio-1-alkenyl Boronates via Copper-Catalyzed Regiodivergent Hydroboration of Thioacetylenes: An Experimental and Theoretical Study
作者:Gangguo Zhu、Wei Kong、Hui Feng、Zhaosheng Qian
DOI:10.1021/jo4028402
日期:2014.2.21
Cu-catalyzed divergent hydroboration of thioacetylenes has been achieved, providing (Z)-1-thio- or (Z)-2-thio-1-alkenyl boronates in moderate to high yields with excellent regio- and stereoselectivity, by using pinacolborane or bis(pinacolato)diboron as the hydroborating reagents, respectively. DFT calculations indicate that the sulfur atom plays a key role in determining the regioselectivity through polarizing
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。
Deconstructive Carboxylation of Activated Alkenes with Carbon Dioxide
A novel metal-free photochemical method for the deconstructive carboxylation of alkenes with CO2 is reported for the first time. The power of this strategy is demonstrated for the late-stage carboxylation of bioactive molecule derivatives and the synthesis of propionate nonsteroidal anti-inflammatory drugs.