反应详情

温度

165 °C

32 g (185 mmol) of 4-bromophenol are treated in methanol with 33.32 g (185 mmol) of 30% solution of sodium methoxide in methanol. The solvent is eliminated and the residue mixed with 5.0 g (37.00 mmol) of furo[3,4-b]pyridin-5(7H)-one (prepared according to Synthesis, 1997, 113-116). The system is stirred at 165° C. for 30′ (at first the mixture melts, afterwards solidifies). Once at room temperature, the solid is dissolved in excess water, adjusted at pH 7-8 with 2N HCl and extracted two times with dichloromethane. The aqueous layer is adjusted at pH 5-6 with more 2N HCl and the solid that precipitates is filtered, washed with water and dried. The yield is 6.6 g (58%).

1. extractionextracted two times with dichloromethane
2. customthe solid that precipitates
3. filtrationis filtered
4. washwashed with water
5. customdried