Formic Acid → 6-[N-(2-benzyloxy-5-bromobenzyl)-N-ethylamino]pyridazine-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-[N-(2-benzyloxy-5-bromobenzyl)-N-ethylamino]pyridazine-3-carboxamide (61.7 g), sodium hydroxide (28 g) and isopropanol (400 ml) was heated at reflux for 1 hour. The mixture was cooled to 70° C. and water (800 ml) was added over 30 minutes. The mixture was acidified to pH 3-4 with a solution of formic acid (41.5 ml) in water (200 ml) over 30 minutes, at 25°-30° C. The mixture was cooled to 10° C., the produce filtered off, washed with water and dried to give 6-[N-(2-benzyloxy-5-bromobenzyl)-N-ethylamino]pyridazine-3-carboxylic acid (60.2 g, 97.2% yield).

Provenance & Evidence