Search for physiologically active compounds. Part IV. Synthesis of 6- and 7-halo coumarins by direct condensation procedures

7-Bromo and 7-bromo-4-methyl coumarins have been prepared by the Pechmann condensation of m-bromo phenol. From the halo-substituted o-hydroxy acetophenones, 7-halo-4-methyl-3-phenyl, 7-halo-4-hydroxy, 7-halo-4-methyl-3-cyano and 6-bromo-4-methyl-3-phenyl coumarins have been synthesised