Selective homo- and cross-desilacoupling of aryl and benzyl primary silanes catalyzed by a barium complex
作者:Zhizhou Liu、Xianghui Shi、Jianhua Cheng
DOI:10.1039/d0dt01158d
日期:——
Under mild conditions (25 °C, 5 mol% cat.), highly selective homo- and cross-desilacoupling of aryl and benzyl primary silanes to secondary silanes was achieved by the use of the heteroleptic barium aminobenzyl complex [(TpAd,iPr)Ba(CH2C6H4NMe2-o)] (TpAd,iPr = hydrotris(3-adamantyl-5-isopropyl-pyrazolyl)borate) (1) as a catalyst. Dihydrosilanes originating from catalytic redistribution and cross-desilacoupling
在温和的条件下(25°C,5 mol%催化),通过使用杂芳基钡氨基苄基络合物[(Tp Ad,iPr),实现了芳基和苄基伯硅烷与仲硅烷的高选择性均-和交叉-脱硅偶联。Ba(CH 2 C 6 H 4 NMe 2 - o)](Tp Ad,iPr =氢三(3-金刚烷基-5-异丙基-吡唑基)硼酸酯)(1)。分离出了源自催化重分布和交叉脱硅偶联反应的二氢硅烷,收率很高,这表明钡络合物在仲芳基和苄基硅烷合成中的可行性应用。
Copper-Catalyzed Highly Selective Hydrosilylation of Silyl or Boryl Alkene: A Method for Preparing Chiral Geminated Disilyl and Borylsilyl Reagents
作者:Min Zhang、Yuqi Ji、Zheng Zhang、Chun Zhang
DOI:10.1021/acs.orglett.2c00858
日期:2022.4.15
The copper-catalyzedhighlyselective hydrosilylation of silyl or boryl alkene has been developed. This chemistry could afford a practical method for preparing chiral geminated disilyl and borylsilyl reagents, which are useful organosilanes and versatile synthons for organic synthesis. The experimental data suggested that this reaction could be compatible with a variety of functional groups. Furthermore
Redistribution of primary silanes through C-Si and Si-H bondcleavage and reformation provides a straightforward synthesis of secondary silanes, but the poor selectivity and low efficiency severely hinders the application of this synthetic protocol. Here, we show that a newly synthesized divalent ytterbium alkyl complex exhibits unprecedentedly high catalytic activity toward the selective redistribution
Selective Access to Silacyclopentanes and Homoallylsilanes by La-Catalyzed Hydrosilylations of 1-Aryl Methylenecyclopropanes
作者:Xiaoming Xu、Ailin Gao、Xiufang Xu、Jianfeng Li、Chunming Cui
DOI:10.1021/jacs.3c12355
日期:2024.2.14
their unique reactivity. However, metal-catalyzed hydrosilylation of MCPs has met with very limited successes. In this paper, catalytic selective hydrosilylations of MCPs with some primary silanes using an ene-diamido lanthanum ate complex as the catalyst were described. The catalytic reactions resulted in the selective formation of silacyclopentanes and (E)-homoallylsilanes, respectively, depending on
Organocalcium Complex-Catalyzed Selective Redistribution of ArSiH<sub>3</sub> or Ar(alkyl)SiH<sub>2</sub> to Ar<sub>3</sub>SiH or Ar<sub>2</sub>(alkyl)SiH
作者:Tao Li、Karl N. McCabe、Laurent Maron、Xuebing Leng、Yaofeng Chen
DOI:10.1021/acscatal.1c00463
日期:2021.6.4
compounds. Herein, we report the synthesis and structural characterization of two calcium alkyl complexessupported by β-diketiminato-based tetradentate ligands. These two calcium alkyl complexes react with PhSiH3 to generate calcium hydrido complexes, and the stability of the hydrido complexes depends on the supportingligands. One calcium alkyl complex efficiently catalyzes the selective redistribution