(+/-)-{4-[2,4-Bis(methoxymethoxy)phenyl]cyclohexylidene}acetic acid → {4-[2,4-Dihydroxyphenyl]cyclohexylidene}acetic acid
反応式
COC[O:4][C:5]1[CH:10]=[C:9]([O:11]COC)[CH:8]=[CH:7][C:6]=1[CH:15]1[CH2:20][CH2:19][C:18](=[CH:21][C:22]([OH:24])=[O:23])[CH2:17][CH2:16]1>CO>[OH:4][C:5]1[CH:10]=[C:9]([OH:11])[CH:8]=[CH:7][C:6]=1[CH:15]1[CH2:16][CH2:17][C:18](=[CH:21][C:22]([OH:24])=[O:23])[CH2:19][CH2:20]1参加物
3
反応条件
- 温度
- 60 °C
実験手順
A round bottomed flask equipped with magnetic stirrer was loaded with (±)-{4-[2,4-bis(methoxymethoxy)phenyl]cyclohexylidene}acetic acid (25 mg, 74 μmol), acidic dowex resin (75 mg) and methanol (15 ml) then stirred at 60° C. for 3 hr. The reaction mixture was filtered through a celite plug, washing with methanol. The solvent was removed under reduced pressure to give a yellow oil (15 mg) which was purified by preparative TLC (ethyl acetate/petroleum ether, 3:1, v/v), furnishing the title compound (6.5 mg, 35%) as an oil. m/z(ES+) 339 (M+H+).