4-Methoxybenzoic Acid → N-(1,8-naphthyridin-2-yl)-4-methoxybenzamide

Participants

Reaction Conditions

Reaction Steps

The procedure is similar to that described in Example 1, but starting with 4-methoxybenzoic acid (4.55 g), N,N'-carbonyldiimidazole (6.55 g) and 2-amino-1,8-naphthyridine (5.2 g). The product produced by precipitation in water (8.35 g; m.p. 85° C., viscous) is filtered and then dissolved in boiling 1-propanol (50 cc). After 1 hour's cooling at 4° C., the crystallised solid is separated by filtration, washed with 1-propanol (2×5 cc) and dried at 35° C. under reduced pressure (0.067 kPa). N-(1,8-naphthyridin-2-yl)-4-methoxybenzamide (6.9 g) is produced, m.p. 150° C.

Provenance & Evidence