4-hydroxy-5-methyl-5-phenyl-3-phenylmethoxy-2-(5H)-furanone → 3,4-dihydroxy-5-methyl-5-phenyl-2(5H)-furanone
Reaktionsgleichung
[OH:1][C:2]1[C:6]([CH3:13])([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[O:5][C:4](=[O:14])[C:3]=1[O:15]CC1C=CC=CC=1>CO.[Pd].[O-]S([O-])(=O)=O.[Ba+2]>[OH:15][C:3]1[C:4](=[O:14])[O:5][C:6]([CH3:13])([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[C:2]=1[OH:1]Komponenten
4
Edukt 1
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 2
Versuchsvorschrift
The 4-hydroxy-5-methyl-5-phenyl-3-phenylmethoxy-2-(5H)-furanone (1.2 g) was subjected to hydrogenation over 100 mg of 5% Pd/BaSO4 in 100 mL of MeOH at room temperature and under 30 psi H2. The reaction was monitored periodically by TLC analysis. The suspension was filtered through two #1 filter papers, concentrated to a white solid and recrystallized from MeOH/H2O to give 3,4-dihydroxy-5-methyl-5-phenyl-2(5H)-furanone as a white crystalline material: mp 173-175° C. dec. 1H NMR (acetone-d6) δ 7.53-7.36 (m, 5H), 1.84 (s, 3H). Anal Calcd for C11H10O4 +0.125 H2O: C, 63.38; H, 4.96. Found: C, 63.30; H, 4.96.