We established a highly enantioselective Si-H insertion reaction to construct chiral centers at the carbon and silicon atoms, using Ru(II)-Pheox catalyst. The catalytic asymmetric Si-H insertion reaction of [small alpha]-methyl-[small alpha]-diazoesters proceeded...
Palladium-catalyzed hydrosilylation of ynones to access silicon-stereogenic silylenones by stereospecific aromatic interaction-assisted Si-H activation
Hydrosilylation is one of the most important reactions in synthetic chemistry and ranks as a fundamental method to access organosilicon compounds in industrial and academic processes. However, the enantioselective construction of chiral-at-silicon compounds via catalytic asymmetric hydrosilylation remained limited and difficult. Here we report a highlyenantioselectivehydrosilylation of ynones, a
Asymmetric silanes: A synthesis of nonracemic alkenylhydrosilanes has been developed based on the desymmetrization of a dihydrosilane through alkenylation with an alkyne using an asymmetric catalyst. The alkenylhydrosilane product can be used as a versatile chiral building block for other functionalized nonracemic silanes through the stereoselective conversion of its hydride and/or alkenyl moiety.
Enantioselective Intermolecular C−H Silylation of Heteroarenes for the Synthesis of Acyclic Si‐Stereogenic Silanes
作者:Shuyou Chen、Jiefeng Zhu、Jie Ke、Yingzi Li、Chuan He
DOI:10.1002/anie.202117820
日期:2022.5.16
An enantioselective intermolecular C−H silylation of heteroarenes for the synthesis of acyclic silicon-stereogenic heteroarylsilanes has been developed. This process proceeds via a rhodium-catalyzed direct intermolecular dehydrogenative Si−H/ C−H cross-coupling, giving access to a variety of optically active silicon-stereogenic monohydrosilanes with excellent chemo-, regio-, and stereocontrol.
An enantioselective intermolecular C−H silylation of heteroarenes for the synthesis of acyclic silicon-stereogenic heteroarylsilanes has been developed. This process proceeds via a rhodium-catalyzed direct intermolecular dehydrogenative Si−H/ C−H cross-coupling, giving access to a variety of optically active silicon-stereogenic monohydrosilanes with excellent chemo-, regio-, and stereocontrol.,已经开
Catalytic enantioselective N-silylation of sulfoximine
作者:Xingfen Huang、Jiefeng Zhu、Chuan He
DOI:10.1016/j.cclet.2023.108783
日期:2024.4
A rhodium/diphosphine-catalyzed asymmetric cross-dehydrogenative coupling between sulfoximines and dihydrosilanes has been achieved. This is the first report on the enantioselective -silylation of sulfoximines. The protocol gives access to a variety of Si-stereogenic -silylated sulfoximines in decent yield (up to 99%) with excellent stereoselectivity (up to 99%), featuring high atom economy, and a
已经实现了亚砜亚胺和二氢硅烷之间的铑/二膦催化的不对称交叉脱氢偶联。这是关于亚砜亚胺的对映选择性甲硅烷基化的第一份报告。该方案可以以良好的产率(高达 99%)获得各种 Si-立体-甲硅烷基化亚砜亚胺,具有优异的立体选择性(高达 99%),具有高原子经济性和以 H 作为唯一副产物的更清洁的方式。获得的双-Si-立体单氢硅烷产物可以进一步转化为具有侧亚磺酰亚胺基团的相应手性聚合物。