SELECTIVE CLEAVAGE OF C–O BONDS IN ESTERS THROUGH OXIDATIVE ADDITION TO NICKEL(0) COMPLEXES

Abstract
Zero-valent nickel complexes, especially bis(1,5-cyclooctadiene)nickel Ni(cod)2 in the presence of various tertiary phosphines, promote cleavage of C–O bonds in phenyl carboxylates and alkenyl acetates to give nickel complexes such as nickel carbonyls and nickel phenoxide and other gaseous and liquid products. The position of cleavage of the ester and consequently the products of the reaction depend on the ester, nickel complex employed and the ligand added to the reaction mixture.

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