反应详情

The product obtained at (655b) (15.5 g, 2.97 mmol) was combined with a mixture of potassium tert.-butylate (6.00 g, 53.5 mmol) and 400 mL ethanol, that was stirred at ambient temperature already for 15 min. After stirring for 1 h, 400 mL ethanol were added. After further 1 h of stirring, potassium tert.-butylate (500 mg, 4.46 mmol) was added. After further 1.5 h, the mixture was poured into water and acidified with KHSO4 (aq). After stirring for 20 min, the precipitate was filtered off, washed with water and dried at 55° C.

1. stirringAfter stirring for 1 h
2. stirringAfter further 1 h of stirring
3. waitAfter further 1.5 h
4. stirringAfter stirring for 20 min
5. filtrationthe precipitate was filtered off
6. washwashed with water
7. customdried at 55° C.