p-Toluenesulfonic acid → methyl delta-hydroxy-2-(5-hydroxy-1E,3E-tridecadienyl)benzenepentanoate
反応式
[OH:1][CH:2]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=1/[CH:16]=[CH:17]/[CH:18]=[CH:19]/[CH:20]([O:29]C1CCCCO1)[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH3:28])[CH2:3][CH2:4][CH2:5][C:6]([O:8][CH3:9])=[O:7].C1(C)C=CC(S(O)(=O)=O)=CC=1>CO>[OH:1][CH:2]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=1/[CH:16]=[CH:17]/[CH:18]=[CH:19]/[CH:20]([OH:29])[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH3:28])[CH2:3][CH2:4][CH2:5][C:6]([O:8][CH3:9])=[O:7]参加物
4
反応条件
- 温度
- 55 °C
実験手順
To 3ml of methanol is added 0.1g (0.21 mmol) of the titled product of Example 12 and 10mg of p-toluenesulfonic acid. The reaction mixture is heated to 55°C. for 3 hours. The solvent was removed under reduced pressure and the residue was flash chromatographed on silica gel column. Elution with 2:1 diethyl ether hexane produced 3 bands. The third band contained 0.30g of the titled products which was collected as fractions 8-18.