Intramolekulare Cyclisierung von Aminofluorsilanen

摘要

Aminofluorosilanes react with lithiated amines undergoing LiF-elimination and substitution (1). The acyclic silicon-nitrogen-compound2is isolated in the reaction with a difluorosilane after renewed lithiation.2is cyclisated in the reaction with butyllithium by butane- and LiF-elimination (3). Aminofluorosilanes with bulky (4) or mesomeric stabilized (5) ligands form stable lithioaminofluorosilanes, which react with fluorosilanes giving substitution products (6, 7).6and7react with the lithium salt oftert-butylamin in a molar ratio of 1∶2 to give8and9by intramolecular cyclisation.—The mass,1H and19F nmr spectra of the compounds are repor