3944-16-9Relevant articles and documents
?-Silicon-effect-promoted intermolecular site-selective C(sp3)-H amination with dirhodium nitrenes
Ninomiya, Ryo,Arai, Kenta,Chen, Gong,Morisaki, Kazuhiro,Kawabata, Takeo,Ueda, Yoshihiro
supporting information, p. 5759 - 5762 (2020/06/03)
A dirhodium-catalyzed, ?-selective C-H amination of organosilicon compounds has been developed. Primary C(sp3)-H bonds of silylethyl groups and secondary C(sp3)-H bonds of silacycloalkanes can be selectively converted to C-N bonds at the ?-position of the silicon atoms. The experimental data and theoretical calculations indicate that the strong s-donor ability of the carbon-silicon bonds is responsible for the ?-selectivity. Kinetic isotope effects clearly demonstrate that the C-H bond cleavage step is not turnover-limiting, but selectivity-determining.
UEBER DIE AUSTAUSCHBARKEIT VON METHYL- UND PHENYLGRUPPEN AM SILICIUM VON SILACYCLOPENTAN BEI DER EINWIRKUNG VON ALKYL- UND ARYLLITHIUMVERBINDUNGEN IN DIETHYLETHER ODER TETRAHYDROFURAN
Maercker, Adalbert,Stoetzel, Reinhard
, p. C57 - C63 (2007/10/02)
A degenerate ligand exchange, presumably via an ate-complex intermediate, takes place upon treatment of 1,1-dimethyl- (3) and 1,1-diphenyl-silacyclopentane (17) in THF-d8 with perdeuteriomethyllithium (4-d3) or perdeuteriophenyllithium (15-d5), respective