butyl (E)-3-(3,4-dihydroxyphenyl)prop-2-enoate

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 50 ml of butanol into which hydrogen chloride gas was introduced beforehand for about 10 minutes, was added 2 g of caffeic acid. The resulting mixture was heated at 90° to 100° C. and stirred for 3 hours. The reaction product was concentrated under a reduced pressure, and the residue obtained was purified by means of chromatography and then recrystallized from ether/hexane to give 1.4 g of caffeic acid butyl ester. The resulting mixture was heated at 90° to 100° C. The reaction product was concentrated under a reduced pressure the residue obtained was purified by means of chromatography recrystallized from ether/hexane

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To 50 ml of butanol into which hydrogen chloride gas was introduced beforehand for about 10 minutes, was added 2 g of caffeic acid. The resulting mixture was heated at 90° to 100° C. and stirred for 3 hours. The reaction product was concentrated under a reduced pressure, and the residue obtained was purified by means of chromatography and then recrystallized from ether/hexane to give 1.4 g of caffeic acid butyl ester. The resulting mixture was heated at 90° to 100° C. The reaction product was concentrated under a reduced pressure the residue obtained was purified by means of chromatography recrystallized from ether/hexane