Journal of the Chemical Society, Dalton Transactions p. 1715 - 1720 (1989)
Update date:2022-08-02
Topics:
Dupont, Jairton
Beydoun, Nohma
Pfeffer, Michel
The cyclopalladation reactions of several sulphur-containing ligands have been investigated.The thioethers benzyl methyl sulphide, methyl naphthyl sulphide, 2,6-dimethylphenyl methyl sulphide, and neopentyl sulphide have been metallated by palladium acetate in acetic acid at either aryl or alkyl carbon atoms to afford, after reaction with lithium chloride in acetone, dimeric chloride-bridged cyclopalladated complexes in moderate (22percent) to good (81percent) yields.In these products each metal is part of a five-membered ring.The same reaction with 2-biphenyl methyl sulphide afforded a dimeric complex containing a six-membered cyclopalladated ring through palladation of the ortho position of the biphenyl group. 4,4'-Dimethoxythiobenzophenone and N,N,N',N'-tetramethyl-thiourea have been palladated by using a ligand-exchange reaction with <
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