Methyl beta-benzoyl-alpha-methoxypropionate → Methyl-4-oxo-4-phenyl-2-butenoate
反応式
[C:1]([CH2:9][CH:10](OC)[C:11]([O:13][CH3:14])=[O:12])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>C1(C)C=CC=CC=1>[C:1](/[CH:9]=[CH:10]/[C:11]([O:13][CH3:14])=[O:12])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1参加物
3
反応条件
- 温度
- 80 °C
実験手順
A mixture of 268 mg of methyl β-benzoyl-α-methoxypropionate, 150 mg of paratoluenesulfonic acid monohydrate and 5 ml of toluene was stirred at 80° C. for 1 hour. A pressure was reduced with an aspirator and a total amount of the resultant was reduced to 1/2 by concentration. The resultant was stirred at 80° C. for 20 minutes and was left for cooling. The reaction mixture was distributed between ethyl acetate and water and the ethyl acetate layer was washed with a saturated solution of NaHCO3 and then with water, and was dried with anhydrous magnesium sulfate. The solvent was distilled away to give 206 mg of methyl trans-β-benzoylacrylate as a yellow oil.