反应详情

To a solution of 5-chloro-4-(4-fluorobenzyl)-pyridine-2-carboxylic acid methyl ester (190 mg, 0.68 mmol) in THF (10 mL) was added sodium hydroxide solution (1.36 mL, 1 N). The resulting solution was stirred at room temperature for 2 hours, and afterwards acidified with hydrochloric acid (15 mL, 1N) and poured into ethyl acetate (50 mL). The phases were separated and the water phase was extracted with additional ethyl acetate; the organic portions were combined, dried over Na2SO4, filtered and concentrated. The crude material (186 mg, quant.) a white solid, was sufficiently pure to be used in the next step without further purification. MS (ESI, m/z): 264.0 (M−H−).

1. customThe phases were separated
2. extractionthe water phase was extracted with additional ethyl acetate
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. customto be used in the next step without further purification