Fischer, Helmut published the artcileCoupling of cyanamides with a carbyne ligand – formation of η2-(C,N)-imidazolium complexes and ansa-carbene complexes, Application In Synthesis of 2451-91-4, the publication is Chemische Berichte (1993), 126(11), 2373-8, database is CAplus.
Dicarbonyl(cyclopentadienyl)(phenylcarbyne)manganese complexes [Cp(CO)2MnCPh]+X– (1–X) (X = BF4, BCl4) react with dimethyl-(2a), diethyl-(2b), and diisopropylcyanamide (2c) in five-fold excess by a head-to-tail cyclization of two cyanamides with the carbyne ligand to give η2-(C,N)-imidazolium complexes I. As byproducts ansa-amino(alkylideneamino)carbene complexes II are formed in which a N:C(Ph) group bridges the carbene carbon and the Cp ring. With increasing excess of the cyanamide the product ratio I:II increases. Among the products of the reaction of 1–X with the cyanamides NCNR2 [NR2 = N(isobutyl)2, N(Bzl)2, N(Me)Ph] no imidazolium complexes I are detected, only ansa-carbene complexes II are isolated. PMe3/H2O or pyridine/H2O displaces the heterocyclic ligand from I (R = Me, X = BF4). The structure of I (R = Me, X = BF4) is established by an x-ray anal.
Chemische Berichte published new progress about 2451-91-4. 2451-91-4 belongs to amides-buliding-blocks, auxiliary class Nitrile,Amine,Benzene, name is N,N-Dibenzylcyanamide, and the molecular formula is C15H14N2, Application In Synthesis of 2451-91-4.
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