Addition reactions of bis(trimethylsilyl)methyl- and 1-azzallyl-lithium with cyanoamines into triazines or β-diketiminatolithium compounds

Reactions of bis(trimethylsilyl)methyl lithium reagent Li[CHR2] (R=SiMe3) and 1-azaallyllithium, [HR]2 with cyanoamines R′CN (R′=Me2N, 1-piperidyl or o, p-pyridyl) yielded β-diketiminatolithiums (1, 2, 5, 7, 8) or symmetrically and mixed substituted triazines (3, 4, 6, 9, 10), respectively. The mechanistic pathways involve silicotropic rearrangements from C to N or N to N and an unusual elimination of Li[CHR2]. The complexes 1, 6, 7, and 10 had been characterized by X-Ray diffraction.