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

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Put a 10 g caffeic acid (1) in a reaction bottle, and add 1 g TsOH and 3 ml 2,2-dimethoxypropane and 10 ml methanol thereinto, followed by refluxing for 6 hours. After the refluxation, remove the solvent and pour the resultant solution into 100 ml water, followed by being extracted by the ethyl acetate for three times, neutralizing with 3% NaHCO3, and finally performing a column chromatography. Therefore, the product, methyl caffeate (the compound 2) is obtained with 98% yield. by refluxing for 6 hours After the refluxation, remove the solvent pour the resultant solution into 100 ml water by being extracted by the ethyl acetate for three times

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Put a 10 g caffeic acid (1) in a reaction bottle, and add 1 g TsOH and 3 ml 2,2-dimethoxypropane and 10 ml methanol thereinto, followed by refluxing for 6 hours. After the refluxation, remove the solvent and pour the resultant solution into 100 ml water, followed by being extracted by the ethyl acetate for three times, neutralizing with 3% NaHCO3, and finally performing a column chromatography. Therefore, the product, methyl caffeate (the compound 2) is obtained with 98% yield. by refluxing for 6 hours After the refluxation, remove the solvent pour the resultant solution into 100 ml water by being extracted by the ethyl acetate for three times

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Put a 10 g caffeic acid (1) in a reaction bottle, and add 1 g TsOH and 3 ml 2,2-dimethoxypropane and 10 ml methanol thereinto, followed by refluxing for 6 hours. After the refluxation, remove the solvent and pour the resultant solution into 100 ml water, followed by being extracted by the ethyl acetate for three times, neutralizing with 3% NaHCO3, and finally performing a column chromatography. Therefore, the product, methyl caffeate (the compound 2) is obtained with 98% yield. by refluxing for 6 hours After the refluxation, remove the solvent pour the resultant solution into 100 ml water by being extracted by the ethyl acetate for three times

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Put a 10 g caffeic acid (1) in a reaction bottle, and add 1 g TsOH and 3 ml 2,2-dimethoxypropane and 10 ml methanol thereinto, followed by refluxing for 6 hours. After the refluxation, remove the solvent and pour the resultant solution into 100 ml water, followed by being extracted by the ethyl acetate for three times, neutralizing with 3% NaHCO3, and finally performing a column chromatography. Therefore, the product, methyl caffeate (the compound 2) is obtained with 98% yield. by refluxing for 6 hours After the refluxation, remove the solvent pour the resultant solution into 100 ml water by being extracted by the ethyl acetate for three times