Chemoselectivity control in the reaction of a dinuclear chloro-bridged cyclopalladated complex with potassium diphenylphosphide |
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| Authors: | Valeria A Stepanova Irina P Smoliakova |
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| Institution: | a Chemistry Department, University of North Dakota, 151 Cornell St., Stop 9024, Grand Forks, ND 58202-9024, USA
b Chemistry Department, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, Moscow 119991, Russian Federation |
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| Abstract: | Reactions of KPPh2 with the dimeric cyclopalladated complex {Pd(N∩C)(μ-Cl)}21 derived from N,N-dimethylbenzylamine were studied using different reagent ratios, temperature, reaction time, concentrations and solvents. Complex 3, the μ-Cl-μ-PPh2 analog of 1, was obtained in 76% yield in the one-hour reaction using the 1:1 ratio of dimer 1 and KPPh2 in THF at rt. ortho-(Diphenylphosphino)benzylamine 4 was synthesized in 58% yield by reacting complex 1 with 4.5 equiv. of KPPh2 in THF at rt. A possible mechanism of the aminophosphine formation is proposed on the basis of the experimental data including 31P{1H} NMR spectra of reaction mixtures. |
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| Keywords: | Cyclopalladated complexes KPPh2 Aminophosphines Palladium(II) phosphido complexes |
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