反应详情

The mixture (562 mg, 2.07 mmol) of N-(7-bromobenzo[d]thiazol-2-yl)acetamide and N-(6-bromobenzo[d]thiazol-2-yl)acetamide were suspended in MeOH (10 mL) and water (2 mL), sodium hydroxide (468.1 mg, 11.70 mmol) were added. The flask was fit with a reflux condenser and placed in a preheated oil bath (78° C.-80° C.) and stirred under nitrogen for 90 minutes. The reaction was cooled to RT and treated with 5N HCl to lower the pH to about 2. The suspension was filtered, and the solid was washed with water. The filtrate was treated with saturated sodium bicarbonate to adjust pH to about 7, and it was filtered again. The solid was collected and purified on an HPLC (10-95% MeCN/water with 0.1% TFA over 40 minutes) to provide 7-bromobenzo[d]thiazol-2-amine (550.3 mg).

1. customThe flask was fit with a reflux condenser
2. customplaced in a preheated oil bath
3. filtrationThe suspension was filtered
4. washthe solid was washed with water
5. additionThe filtrate was treated with saturated sodium bicarbonate
6. filtrationwas filtered again
7. customThe solid was collected
8. custompurified on an HPLC (10-95% MeCN/water with 0.1% TFA over 40 minutes)