Acetonitrile → N-(7-methoxy-1,8-naphthyridin-2-yl)-4-ethoxybenzamide

참여 물질

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반응 단계

The procedure is similar to that described in Example 1, but starting with 4-ethoxybenzoic acid (8 g), N,N'-carbonyldiimidazole (7.8 g) and 2-amino-7-methoxy-1,8-naphthyridine (5.6 g). The product produced by precipitation in water (9.4 g; m.p. 74° C.) is dissolved in boiling acetonitrile (94 cc). After 3 hours' cooling at 4° C., the crystallised solid is separated by filtration, washed with acetonitrile (3×20 cc) and dried at 30° C. under reduced pressure (0.067 kPa). N-(7-methoxy-1,8-naphthyridin-2-yl)-4-ethoxybenzamide (7 g) is produced, m.p. 145° C.

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