反应详情

Ferulic acid (4.85 g) and then ethyl alcohol (50 ml) containing hydrogen chloride (4%) were placed in an egg-plant type flask (200 ml), and heated under reflux for 2.5 hours. The disappearance of the starting material was confirmed by TLC (n-hexane/ethyl acetate=2/1), then the solvent was evaporated under reduced pressure by a rotary evaporator. Benzene was added to the residue, and then, the solvent was again evaporated by a rotary evaporator to obtain the wine-colored crude product (5.79 g). The resulting crude product was separated and purified by silica gel column chromatography (diameter=5.5×7.0 cm; 60 g; n-hexane/ethyl acetate=3/1) to obtain the above-identified compound (5.06 g; 91.2%). The product was crystallized from n-hexane to obtain a white crystal (4.743 g, 85.3%). Melting point: 41°-43° C.

1. customwere placed in an egg-plant type flask
2. temperature(200 ml), and heated
3. temperatureunder reflux for 2.5 hours
4. customthe solvent was evaporated under reduced pressure by a rotary evaporator
5. additionBenzene was added to the residue
6. customthe solvent was again evaporated by a rotary evaporator
7. customto obtain the wine-colored crude product (5.79 g)
8. customThe resulting crude product was separated
9. custompurified by silica gel column chromatography (diameter=5.5×7.0 cm; 60 g; n-hexane/ethyl acetate=3/1)
10. customto obtain the above-identified compound (5.06 g; 91.2%)
11. customThe product was crystallized from n-hexane