反应详情

5-Methyl-6-(piperidine-1-sulfonyl)-pyridine-2-carboxylic acid methyl ester (53 mg, 0.178 mmol) in dioxane (2 mL) was added to a solution of lithium hydroxide monohydrate (CAN 1310-66-3, 0.1 g, 2.38 mmol) in water (2 mL) and the mixture was stirred for 2 h at room temperature. The solvent was removed in vacuo, water (10 mL) was added, and the pH was adjusted to 3 with 1 N hydrochloric acid. The mixture was extracted by ethyl acetate (2×10 mL). The organic layer was washed with brine (20 mL), dried over anhydrous sodium sulfate, and concentrated to give the product (36 mg, 71%); MS (EI): m/e=285.2 [M+H]+.

1. customThe solvent was removed in vacuo, water (10 mL)
2. additionwas added
3. extractionThe mixture was extracted by ethyl acetate (2×10 mL)
4. washThe organic layer was washed with brine (20 mL)
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated