4-Arylcoumarins can be prepared in good to high yields by reacting readily available methyl or butyl 3-(o-hydroxyaryl)acrylates with aryl iodides and bromides in an n-Bu 4 NOAc/n-Bu 4 NBr mixture at 100 8C in the presence of Pd(OAc) 2 .

bromide mixture as the reaction medium. The reaction proceeds through a pseudo-domino process involving two mechanistically independent, sequential catalytic cycles: a Heck reaction followed by an intramolecular Buchwald-Hartwig C À N bond forming reaction.

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Polyphenylalkane derivatives Q 0720The Heck Reaction of β-Arylacrylamides: An Approach to 4-Aryl-2-quinolones.-The reaction of β-arylacrylamides with aryl iodides under conditions A) or B) affords vinylic substitution products. The procedure is used to develop an efficient approach to 4-aryl-2-quinolones. -(BERNINI, R.; CACCHI*, S.; DE SALVE, I.; FABRIZI, G.; Synlett 2006, 18, 2947-2952; Dip. Stud. Chim. Tecnol. Sostanze Biol. Attive, Univ. La Sapienza, I-00185 Roma, Italy; Eng.) -Mais 13-092