Sodium Bicarbonate → Ethyl 6-(4-cyanobenzyl)-7-hydroxyheptanoate
反応式
[CH2:1]([O:3][C:4](=[O:22])[CH2:5][CH2:6][CH2:7][CH2:8][CH:9]([CH2:13][C:14]1[CH:19]=[CH:18][C:17]([C:20]#[N:21])=[CH:16][CH:15]=1)[C:10](O)=[O:11])[CH3:2].C(=O)(O)[O-].[Na+]>C1COCC1>[C:20]([C:17]1[CH:16]=[CH:15][C:14]([CH2:13][CH:9]([CH2:10][OH:11])[CH2:8][CH2:7][CH2:6][CH2:5][C:4]([O:3][CH2:1][CH3:2])=[O:22])=[CH:19][CH:18]=1)#[N:21]参加物
4
反応条件
- 温度
- 0 °C
実験手順
34.42 ml of a 1 M borane-THF complex solution (34.42 mmol) are added dropwise to a solution of 6.64 g (22.94 mmol) of 2-(4-cyanobenzyl)heptanedioic acid 7-ethyl ester from Example 109A in 260 ml of THF at −10° C. After warming to 0° C., the mixture is stirred at this temperature for 2 hours. After the reaction is complete, saturated sodium bicarbonate solution is added to the reaction mixture, and the solvent is concentrated to dryness. The residue is taken up in dichloromethane, dried over sodium sulfate and again freed of solvent. The resulting crude product is purified by flash chromatography on silica gel (mobile phase: ethyl acetate/cyclohexane 1:8→1:2). 5.84 g (88% yield, 20.19 mmol) of a colorless solid are obtained.