Intramolecular N-coordination in ketiminoboranes

摘要

Treatment of the imine PhC(-NSiMe3)py with Et2BOMe or BF3 center dot Et2O afforded bicyclic ketiminoboranes 4a and 4b via intramolecular N-coordination. The basicity of the imine N is evidenced by their reactivity towards Bronsted and Lewis acids and the structures of 4a center dot HCl and 4b center dot BF3 are reported as well as the dipyridyl imine derivative 4c center dot HCl.