CHLOROPALLADATION OF PROPARGYL THIOETHERS - A FACILE SYNTHESIS OF CYCLOPALLADATED COMPOUNDS

The reaction of the propargyl thioethers Ph--C=C-CH(R(1))SR (R = Me, P r-i, Ph and R(1) = H, Me) with Li2PdCl4 in methanol at room temperatur e produced in very good yields (70-90%) five-membered palladocycles [P d(C(Ph)=C(Cl)CH(R(1))SR)(mu-Cl)](2). Under the same reaction condition s the homopropargylthioether Ph-C=C-(CH2)(2)SPh yielded unexpectedly t he complex {Pd[S(Ph)(CH2)(3)C=O(Ph)](Cl)(mu-Cl)}(2) resulting from the hydrolysis of the C=C bond.