Intermolecular and Intramolecular, Platinum-Catalyzed, Acceptorless Dehydrogenative Coupling of Hydrosilanes with Aryl and Aliphatic Methyl C−H Bonds
作者:Naofumi Tsukada、John F. Hartwig
DOI:10.1021/ja050612p
日期:2005.4.1
Intermolecular acceptorless dehydrogenative coupling of silanes with arene C-H bonds and intramolecular coupling of silanes with aryl and alkyl C-H bonds occur in good yield in the presence of 5 mol % of TpMe2PtMe2H (TpMe2 = hydridotris(3,5-dimethylpyrazolyl)borate) and related platinum(IV) complexes. The intermolecular reactions of arenes occurred with both trialkyl and dialkylaryl silanes. Intramolecular reactions of dialkylsilylalkylarenes occurred at aryl C-H bonds, and reactions of tributylsilane or dibutylphenylsilane occurred intramolecularly at the aliphatic, primary C-H bond. The reactions of arenes occurred preferentially at the least sterically hindered C-H bonds and preferentially with more electron-poor arenes. Crossover experiments and the lack of reactivity of the arylsilanes with H2 imply that the dehydrogenative silylation of arenes can be irreversible, even in a closed reaction vessel.
Über die austauschbarkeit von methyl- und phenylgruppen am silicium von silacyclopentan bei der einwirkung von alkyl- und aryllithiumverbindungen in diethylether oder tetrahydrofuran
作者:Adalbert Maercker、Reinhard Stötzel
DOI:10.1016/0022-328x(84)80558-6
日期:1984.10
MAERCKER, A.;STOETZEL, R., J. ORGANOMET. CHEM., 1984, 273, N 3, C57-C63