The Friedel-Crafts reaction of 1-methyl-2 (1H)-pyridone (I), 1-methyl-2 (1H)-quinolone (II), and 2-methyl-1 (2H)-isoquinolone (III) with benzoyl chloride was successfully carried out. I gave products identified as 5-benzoyl-1-methyl-2 (1H)-pyridone (IV), 3-benzoyl-1-methyl-2 (1H)-pyridone (V), and 3, 5-dibenzoyl-1-methyl-2 (1H)-pyridone (VI). II gave 3-benzoyl-1-methyl-2 (1H)-quinolone (VII) and 6-benzoyl-1-methyl-2 (1H)-quinolone (VIII), and III gave 4-benzoyl-2-methyl-1 (2H)-isoquinolone (IX) and 5-benzoyl-2-methyl-1 (2H)-isoquinolone (X).