Sodium Hydroxide → 2-Bromo-6-methoxy-4-methylpyridin-3-amine

Beteiligte Stoffe

Reaktionsschritte

Bromine (4.8 g) was added in one portion to a mixture of 5-amino-2-methoxy-4-methylpyridine (3.9 g) in acetic acid (25 ml) and sodium acetate (4.0 g). The resulting mixture was stirred for 20 min. and then added to a solution of sodium hydroxide (15 g) in water (200 ml). The product was extracted with chloroform, dried (anhydrous magnesium sulfate), concentrated, and purified on a silica gel column (methylene chloride/ethyl acetate, 19:1→4:1) to give 4.5 g of the title compound, suitable for use in the next reaction.

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