Glyoxylic Acid → 3-Ethoxy-4-hydroxymandelic acid

반응식

[CH2:1]([O:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=1[OH:10])[CH3:2].[C:11]([OH:15])(=[O:14])[CH:12]=[O:13].[OH-].[Na+]>O>[CH2:1]([O:3][C:4]1[CH:9]=[C:8]([CH:12]([OH:13])[C:11]([OH:15])=[O:14])[CH:7]=[CH:6][C:5]=1[OH:10])[CH3:2]

참가 물질

실험 절차

2-Ethoxyphenol (56.6, 0.401 mol, 1 eq.), glyoxylic acid (50% aqueous solution) (41.0 mL, 0.396 mol, 0.99 eq.), and distilled water (110 mL) were combined. The mixture was cooled in an ice bath, and a solution of 10% NaOH (32.2 g NaOH in 300 mL distilled water, 0.805 mol, 2 eq.) was slowly added via addition funnel. The reaction was allowed to slowly warm to room temperature, and after ˜18 hours, the solution was washed with ethyl acetate (4×250 mL), then acidified with 6N HCl until pH ˜3. NaCl was added and the product was then extracted into ethyl acetate (4×200 mL). The organic phase was washed with brine, dried over magnesium sulfate, and solvent was removed under vacuum, giving 51.8 g of intermediate 2 as a light pink solid.