Sodium Hydroxide → 4-((6-(2-Ethoxyethoxy)-1H-indol-5-yl)oxy)pyridin-2-amine

Participants

Reaction Conditions

Reaction Steps

A 2 M sodium hydroxide solution (20 mL) was added to a solution of N-(4-((6-(2-ethoxyethoxy)-1H-indol-5-yl)oxy)pyridin-2-yl)acetamide described in Production Example 24-6 (2.5 g, 7.04 mmol) in methanol (20 mL) under nitrogen atmosphere at room temperature, and the mixture was heated and stirred under reflux at 75° C. for 2 hours. The reaction liquid was allowed to stand to cool to room temperature and then diluted with ethyl acetate and water. The organic layer was washed with a saturated saline solution and then dried over anhydrous sodium sulfate. The drying agent was separated by filtration and then the filtrate was concentrated under vacuum. The resultant residue was purified with silica gel column chromatography (n-heptane:ethyl acetate=1:9-0:1-ethyl acetate:methanol=49:1-24:1) to obtain the title compound (1.92 g, 87%).

Provenance & Evidence