Potassium carbonate (9.4 g, 67.8 mmole) was added to a stirred solution of 4,6-dichlorosalicylaldehyde (10.8 g, 56.5 mmole) in dimethylformamide (80 ml). The resulting mixture was stirred at 60° for 30 minutes and treated with benzyl bromide (10.6 g, 62.1 mmole). This mixture was stirred one hour at 60° C. and then poured into ice water (1000 ml) to give the title compound (15.9 g, 100%) which melted at 98°-100° C. after recrystallization from hexane. pmr (CDCl3) δ5.10 (2H, s), 7.33 (5H, s), 10.40 (H, s).
