反应详情

18.30 g (172.6 mmol) of sodium carbonate are added to a solution of 7.03 g (57.5 mmol) of p-hydroxybenzaldehyde and 6.80 g (71.9 mmol) of 1-chloro-2-propanol (technical grade, about 70% pure, isomer mixture with 2-chloro-1-propanol) in 125 ml of dry DMF, and the mixture is stirred at +130° C. for 20 h. After cooling to RT, 100 ml of saturated sodium bicarbonate solution are added and the mixture is extracted with ethyl acetate (three times, 100 ml each). The combined organic phases are dried over magnesium sulphate. After removal of the solvent on a rotary evaporator, the crude product is purified chromatographically on silica gel 60 (mobile phase gradient cyclohexane/ethyl acetate 5:1→2:1).

1. extractionthe mixture is extracted with ethyl acetate (three times, 100 ml each)
2. dry with materialThe combined organic phases are dried over magnesium sulphate
3. customAfter removal of the solvent
4. customon a rotary evaporator
5. customthe crude product is purified chromatographically on silica gel 60 (mobile phase gradient cyclohexane/ethyl acetate 5:1→2:1)