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Ketenimine Complexes from Metal Isocyanides and Diazoalkanes

1990; Wiley; Volume: 29; Issue: 3 Linguagem: Inglês

10.1002/anie.199002751

1521-3773

Beate Strecker, Helmut Werner,

Synthesis and Biological Evaluation

Free ketenimines can be synthesized in two steps from the readily accessible cobalt isocyanide complexes 1 and diaryldiazoalkanes 2 . Thus, ketenimines cannot only be prepared at a metal center from a carbene ligand and an isocyanide but also from an isocyanide ligand and a carbene source, e.g. a diazoalkane. The complexes 3–6 are obtained in 54–68% yield, and the corresponding ketenimines 7–10 can be liberated from these with iodine at room temperature ( 3/7, 4/8, 5/9 : R  Me, CR  CPh 2 , C( p ‐Tol) 2 , fluorenylides; 6/10 : R  CHMePh. CR  fluorenylides). equation image