Hydrochloric Acid → (2RS,4SR)-4-(3-benzyloxyphenyl)-4-hydroxy-2-methyltetrahydropyran
反応式
[CH2:1]([O:8][C:9]1[CH:10]=[C:11](Br)[CH:12]=[CH:13][CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:16][CH:17]1[CH2:22][C:21](=[O:23])[CH2:20][CH2:19][O:18]1.Cl>>[CH2:1]([O:8][C:9]1[CH:10]=[C:11]([C:21]2([OH:23])[CH2:20][CH2:19][O:18][CH:17]([CH3:16])[CH2:22]2)[CH:12]=[CH:13][CH:14]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1参加物
4
実験手順
Using the procedure described in the portion of Example 1 which is concerned with the preparation of starting materials, a Grignard reagent was prepared from 3-benzyloxybromobenzene (10.5 g) and 2-methyltetrahydropyran-4-one (2.28 g) was added. The mixture was stirred at ambient temperature for 3 hours, acidified by the addition of 2N hydrochloric acid solution and extracted with ethyl acetate. Column chromatography, using a 10:3 v/v mixture of toluene and ethyl acetate as eluent, gave a less polar isomer, (2RS,4SR)-4-(3-benzyloxyphenyl)-4-hydroxy-2-methyltetrahydropyran (2.45 g, 41%), as an oil,