Directing group: A Pd‐catalyzed aromaticCHoxygenation has been developed, featuring a modifiable silanol‐directing group. The resulting oxasilacycles can be efficiently modified into a variety of valuable building blocks (see scheme).
导向基团:已开发出Pd 催化的芳香族 C → H 氧化反应,具有可修饰的硅烷醇导向基团。所得的草硅环可以有效地修饰成各种有价值的结构单元(参见方案)。
Rhodium-Catalyzed Intramolecular Silylation of Unactivated C(sp<sup>3</sup>)–H Bonds
The treatment of a variety of hydrosilanes, each incorporating a benzylic C(sp3)–H bond, with a rhodium catalyst resulted in intramolecular dehydrogenativesilylation. This silylation reaction was found to occur at typically unreactive C(sp3)–H bonds located at terminal positions on alkyl chains. Interestingly, the rhodium catalyst also promoted regioselective silylation at a site internal to an alkyl
Ruthenium-Catalyzed Site-Selective Intramolecular Silylation of Primary C–H Bonds for Synthesis of Sila-Heterocycles
作者:Huaquan Fang、Wenjun Hou、Guixia Liu、Zheng Huang
DOI:10.1021/jacs.7b06798
日期:2017.8.23
medicinal chemistry. Moreover, organosilanes are valuable synthetic intermediates for fine chemicals and materials. Transition metal-catalyzed C-H silylation has become an important strategy for C-Si bondformations. However, despite the great advances in aromatic C(sp2)-H bond silylations, catalytic methods for aliphatic C(sp3)-H bond silylations are relatively rare. Here we report a pincer ruthenium