Silicon—nitrogen bond cleavage in N -(dimethylimidosilylmethyl)imides and dimethyl(lactamomethyl)aminosilanes with BF 3 etherate as an alternative route to N -(dimethylf luorosilylmethyl)imides and related compounds

N -(Dimethylfluorosilylmethyl)succinimide ( 2a ) and N -(dimethylfluorosilylmethyl)phthalimide ( 2b ) were synthesized by the Si—N bond cleavage in readily accessible N -(dimethylimidosilylmethyl)imides with BF 3 etherate. Analogously, (O→Si)-chelated 1-(dimethylfluorosilylmethyl)-2-pyrrolidone was prepared from 1-(dimethylmorpholinosilylmethyl)-2-pyrrolidone. X-ray diffraction study demonstrated that the silicon atom in the crystals of 2b is pentacoordinated.