Journal of the American Chemical Society, Vol.130, No.1, 16-16, 2008
Organolanthanide-based synthesis of 1,2,3-triazoles from nitriles and diazo compounds
The reaction of [(C5Me5)(2)Ln][(mu-Ph)(2)BPh2] complexes with the lithium salt of (trimethylsilyl) diazomethane, Li[Me3SiCN2], gave products formulated as the dimeric isocyanotrimethylsilyl amide complexes ((C5Me5)(2)Ln[mu-N(SiMe3)NC])(2) (Ln = Sm, 1; La, 2). Reactions of (C5Me5)(2)Sm and [(C(5)Me(5))2Sm(mu-H)](2) with Me3SiCHN2 also form 1. Complexes 1 and 2 react with Me3CCN to form the 1,2,3-triazolato complexes (C5Me5)(2)Ln(NCCMe3)[NNC(SiMe3)C(CMe3)N] (Ln = Sm, 3; La, 4). Complex 2 reacts with Me3SiN3 to make the isocyanide ligated azide complex ((C5Me5)(2)La [CNN(SiMe3)(2)(mu-N-3))(3),5.