Abstract 6-Alkenyl, alkynyl, and aryl-3, 4-dihydrocoumarins have been prepared from 6- bromo-3, 4-dihydrocoumarin via palladium catalysed coupling reactions. 6-Carboalkoxy-and 6-keto-3, 4-dihydrocoumarins have been obtained via palladium-catalysed carbonylations of 6-bromo-and 6-iodo-3, 4-dihydrocoumarins respectively.