反应详情

To a solution of 2-chloro-5-ethylbenzenesulfonyl chloride (0.41 g, 1.7 mmol, the product of Step A) in tetrahydrofuran (30 mL) was added 30% ammonium hydroxide (0.41 mL, 3.5 mmol) dropwise. The reaction mixture was stirred for 15 minutes, during which time a suspension formed. To this mixture water (10 mL) was added, and the tetrahydrofuran was evaporated under reduced pressure to precipitate a solid. The solid was dissolved in diethyl ether, dried over magnesium sulfate, and concentrated under reduced pressure. Diethyl ether and hexane were added to precipitate a solid. The solid was isolated by filtration to afford 190 mg of the title compound. 1H NMR (CDCl3) δ 7.95 (s, 1H), 7.43 (d, 1H), 7.35 (d, 1H), 5.08 (br s, 2H), 2.71 (q, 2H), 1.25 (t, 3H).

1. customformed
2. customthe tetrahydrofuran was evaporated under reduced pressure
3. customto precipitate a solid
4. dissolutionThe solid was dissolved in diethyl ether
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. additionDiethyl ether and hexane were added
8. customto precipitate a solid
9. customThe solid was isolated by filtration