反应详情

To a stirred solution of methyl 6-[(methylsulfonyl)methyl]nicotinate (800 mg) in 1:1.1 tetrahydrofuran/methanol/water (30 mL) was added lithium hydroxide (440 mg). The mixture was stirred at room temperature for 1 h, and concentrated under reduced pressure. The residue was partitioned between water (10 mL) and chloroform (10 mL). The aqueous layer was acidified to pH 4 with 1 N hydrochloric acid and extracted with 3:1 chloroform/2-propanol (3×30 mL). The combined organic layers were dried (sodium sulfate), filtered, and concentrated under reduced pressure to provide 700 mg of the title compound: 1H NMR (300 MHz, CD3OD) δ 9.07, 8.33, 7.65, 4.77, 3.06.

1. concentrationconcentrated under reduced pressure
2. customThe residue was partitioned between water (10 mL) and chloroform (10 mL)
3. extractionextracted with 3:1 chloroform/2-propanol (3×30 mL)
4. dry with materialThe combined organic layers were dried (sodium sulfate)
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure