M. Catellani et al., INTRAMOLECULAR CYCLIZATION OF ORTHO-IODOPHENYL 3-BUTENOATE TO 4-METHYLCOUMARIN - CATALYSIS BY PALLADIUM COMPLEXES, Tetrahedron letters, 35(32), 1994, pp. 5919-5922
A new palladium-catalyzed synthesis of 4-alkylcoumarins is reported, b
ased on intramolecular arylation of the 3-alkenoic chain of an ortho-i
odophenyl ester.