Zd. Jin et Pl. Fuchs, REGIOSPECIFIC SILVER[1] PROMOTED, PALLADIUM[0]-CATALYZED INTRAMOLECULAR ADDITION OF ARYL IODIDES TO VINYL SULFONES, Tetrahedron letters, 34(33), 1993, pp. 5205-5208
Treatment of aryl iodides with 5% tetrakis(triphenylphosphine)palladiu
m[0] in the presence of silver nitrate and triethylamine in acetonitri
le at reflux effects intramolecular conjugate-addition/reductive elimi
nation to generate an annulated vinyl sulfone. Omission of the silver
nitrate produces mixtures of vinyl and allyl sulfones.