Iron-Catalyzed Highly Enantioselective Hydrosilylation of Unactivated Terminal Alkenes
作者:Biao Cheng、Wenbo Liu、Zhan Lu
DOI:10.1021/jacs.8b01638
日期:2018.4.18
The iron-catalyzed highly Markovnikov-type selective and enantioselective hydrosilylation of terminal aliphatic alkenes with good functional group tolerance is developed. This operationally simple protocol uses earth-abundant transition metal catalyst, readily available aliphatic alkenes and hydrosilanes to construct valuable chiral organosilanes with better than 99% ee in most cases. The chiral aliphatic
CARBON–SILICON BOND CLEAVAGE OF ORGANOTRIALKOXYSILANES AND ORGANOSILATRANES WITH<i>m</i>-CHLOROPERBENZOIC ACID AND<i>N</i>-BROMOSUCCINIMIDE. NEW ROUTE TO PHENOLS, PRIMARY ALCOHOLS AND BROMIDES
作者:Akira Hosomi、Susumu Iijima、Hideki Sakurai
DOI:10.1246/cl.1981.243
日期:1981.2.5
Alkyl- and aryltriethoxysilanes undergo oxidative carbon–silicon bond cleavage smoothly with m-chloroperbenzoic acid (MCPBA) to afford the corresponding alcohols. Silatranes similarly gave alcohols and bromides with MCPBA and N-bromosuccinimide, respectively.
bearing 2,9-diaryl-1,10-phenanthroline ligands exhibit not only unprecedented catalytic activity but also unusual ligand-controlled divergent regioselectivity in hydrosilylation reactions of various alkynes. The hydrosilylation protocol described herein provides a highly efficient method for preparing useful di- and trisubstituted olefins on a relatively large scale under mild conditions, and its use
Rare-Earth-Catalyzed Selective 1,4-Hydrosilylation of Branched 1,3-Enynes Giving Tetrasubstituted Silylallenes
作者:Wufeng Chen、Chunhui Jiang、Jianying Zhang、Jiaqi Xu、Lin Xu、Xiufang Xu、Jianfeng Li、Chunming Cui
DOI:10.1021/jacs.1c04689
日期:2021.8.25
reactivities. Catalytic 1,4-hydrosilylation of 1,3-enynes may present the straightforward strategy for synthesis of silylallenes. However, the transition-metal-catalyzed reaction has not been successful due to poor selectivity and very limited substrate scopes. We report here the efficient and selective 1,4-hydrosilylation of branched 1,3-enynes enabled by the ene-diamido rare-earth ate catalysts using both alkyl
Highly selective redistribution of primary arylsilanes to secondary arylsilanes catalyzed by Ln(CH<sub>2</sub>C<sub>6</sub>H<sub>4</sub>NMe<sub>2</sub>-<i>o</i>)<sub>3</sub>@SBA-15
作者:Chenjun Guo、Min Li、Jue Chen、Yunjie Luo
DOI:10.1039/c9cc07493g
日期:——
Rare-earth metal tris(aminobenzyl) complexes Ln(CH2C6H4NMe2-o)3 (Ln = La, Y) were grafted onto the dehydroxylated periodic mesoporous silica support SBA-15 to generate the organometallic–inorganic hybrid materials Ln(CH2C6H4NMe2-o)3@SBA-15 (Ln = La (2a), Y (2b)), which demonstrated extremely high selectivity (>99%) in catalyzing the redistribution of primary arylsilanes to secondary arylsilanes without
将稀土金属三(氨基苄基)配合物Ln(CH 2 C 6 H 4 NMe 2 - o)3(Ln = La,Y)接枝到脱羟基的周期性介孔二氧化硅载体SBA-15上,以生成有机金属-无机杂化材料Ln(CH 2 C 6 H 4 NMe 2 - o)3 @ SBA-15(Ln = La(2a),Y(2b)))在催化伯芳基硅烷向仲芳基硅烷的再分布方面表现出极高的选择性(> 99%),而无需严格控制反应条件。在三个催化循环后,杂化材料仍显示出完美的选择性和活性。