Sodium Formate → Benzhydryl 4-hydroxy-3-oxobutanoate
反応式
[C:1]1([CH:7]([O:14][C:15](=[O:21])[CH2:16][C:17](=[O:20])[CH2:18]Br)[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C([O-])=[O:23].[Na+]>CO>[C:1]1([CH:7]([O:14][C:15](=[O:21])[CH2:16][C:17](=[O:20])[CH2:18][OH:23])[C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1参加物
4
実験手順
To a solution of 4-bromo-3-ketobutyric acid diphenylmethyl ester (2b, 11.4 g, 32.8 millimoles) in methanol dried with Molecular Sieves is added sodium formate (3.40 g, 50.0 millimoles), and the mixture is refluxed for 4 hours. The reaction mixture is filtered to remove solid material concentrated under reduced pressure, and extracted with ethyl acetate. The extract is washed with water, dried over magnesium sulfate and evaporated to remove the solvent. The residue is purified by chromatography over Lobar® column B using a mixture of benzene and ethyl acetate (3:1) as eluting solvent to afford the title compound (3b, 4.39 g, 47%).