Heck coupling styrene with aryl halides catalyzed by palladium complexes in biphasic media
Written by sctunisie no commentsIn this work, we have studied the effect of the halide nature in the coupling of styrene with halide benzene catalysed by palladium acetate or chloride. The activation by a catalyst of phase-transfer type Aliquat-336 improves the reactivity in N, N-dimethylformamide-water mixture. The presence of electron-donating groups on the aromatic nucleus of aryl halide involves a decrease of yields. We have also tested the effectiveness of the catalytic system PdCl{C6H3-2,6-(OPiPr2)2} in the coupling of styrene with aromatic chlorides. In this context, a reactional mechanism is proposed.
K. Saïd, Y. Moussaoui, R. Ben Salem
Palladium complexes, phase transfer catalysis, Heck reaction, Aliquat-336, arylation
Pages 59-67
