Methyl 4-[3-(4-cyanobenzyl)-4-hydroxybutyl]benzoate → Methyl 4-[3-(4-cyanobenzyl)-4-oxobutyl]benzoate
반응식
[C:1]([C:3]1[CH:24]=[CH:23][C:6]([CH2:7][CH:8]([CH2:21][OH:22])[CH2:9][CH2:10][C:11]2[CH:20]=[CH:19][C:14]([C:15]([O:17][CH3:18])=[O:16])=[CH:13][CH:12]=2)=[CH:5][CH:4]=1)#[N:2].[Cr](Cl)([O-])(=O)=O.[NH+]1C=CC=CC=1>ClCCl>[C:1]([C:3]1[CH:4]=[CH:5][C:6]([CH2:7][CH:8]([CH:21]=[O:22])[CH2:9][CH2:10][C:11]2[CH:12]=[CH:13][C:14]([C:15]([O:17][CH3:18])=[O:16])=[CH:19][CH:20]=2)=[CH:23][CH:24]=1)#[N:2]참가 물질
4
실험 절차
A solution of 400 mg (1.24 mmol) of methyl 4-[3-(4-cyanobenzyl)-4-hydroxybutyl]benzoate from Example 73A in 7 ml of dichloromethane is mixed with 320 mg (1.48 mmol) of pyridinium chlorochromate (PCC) and stirred at room temperature for 5 hours. After conversion is complete, about 1 g of silica gel is added, and the solvent is removed to dryness in vacuo. The residue is purified by flash chromatography on silica gel (mobile phase: cyclohexane/ethyl acetate 10:1→4:1). 302 mg (90% purity, 69% yield) of a colorless solid are obtained.