Reactions of amides with zerovalent and divalent palladium and platinum complexes
作者:David R. Schaad、Clark R. Landis
DOI:10.1021/om00042a016
日期:1992.6
The reactions of amides (RCONH2 and CF3SO2NH2) with L2Pd(CH3)2 and L2Pt(CH3)2 and with transient L2Pt0 to yield new complexes containing palladium- and platinum-amido nitrogen bonds are reported. Photolysis of Pt(C2O4)(PEt3)2 (1) in the presence of amide generates products of the type trans-PtH-(HNR)(PEt3)2 (R = SO2CF3 (1a), COCF3 (1b)). Reaction of amides with trans-PtH-(CH3)(PEt3)2 (2), cis-PdMe2(PEt3)2 (3), cis-PtMe2(PEt3)2 (4), PdMe2(dcpe) (5), PdMe2(dmpe) (6), and PtMe2(COD) (7) produces 1a,b, trans-PdMe(HNR)(PEt3)2 (R = SO2CF3 (3a), COCF3 (3b), COCF2H (3c), COPh (3d)), PtMe(HNR)(PEt3)2 (R = SO2CF3 (4a), COCF3 (4b)), PdMe(HNR)(dcpe) (R = SO2CF3 (5a), COCF3 (5b), COPh (5c)), PdMe(HNSO2CF3)(dmpe) (6a), and PtMe(HNR)(COD) (R = SO2CF3 (7a), COCF3 (7b)), respectively. The stereochemistry and topologies of the new compounds are established by multinuclear NMR spectroscopy. The relevance of these reactions to hydroamination catalysis is discussed.