Vanillin → Methyl 5-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoate

HRID 2221633Notes

Reaction equation

Cl[CH2:2][C:3]1[N:4]=[C:5]([C:9]2[CH:10]=[CH:11][C:12]([CH3:19])=[C:13]([CH:18]=2)[C:14]([O:16][CH3:17])=[O:15])[O:6][C:7]=1[CH3:8].[O:20]=[CH:21][C:22]1[CH:30]=[CH:29][C:27]([OH:28])=[C:24]([O:25][CH3:26])[CH:23]=1.C(=O)([O-])[O-].[K+].[K+].CN(C)C=O>O>[CH:21]([C:22]1[CH:30]=[CH:29][C:27]([O:28][CH2:2][C:3]2[N:4]=[C:5]([C:9]3[CH:10]=[CH:11][C:12]([CH3:19])=[C:13]([CH:18]=3)[C:14]([O:16][CH3:17])=[O:15])[O:6][C:7]=2[CH3:8])=[C:24]([O:25][CH3:26])[CH:23]=1)=[O:20]

Participants

Conditions

Temperature: 90 °C

Procedure

A mixture of methyl 5-(4-chloromethyl-5-methyl-1,3-oxazol-2-yl)-2-methylbenzoate (1.21 g), vanillin (0.65 g), anhydrous potassium carbonate (0.59 g) and N,N-dimethylformamide (50 mL) was stirred at 90° C. for 2 hrs. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated to give methyl 5-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-methylbenzoate as colorless crystals (1.45 g, yield 85%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 136-137° C.

Workup

extractionthe mixture was extracted with ethyl acetate
washThe organic layer was washed with saturated brine
dry with materialdried over anhydrous magnesium sulfate
concentrationconcentrated

Sources & evidence

ORD record: ord-21e9b61c55eb425981a231b5f5438f33
Source dataset: uspto-grants-2008_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07368578B2

Reaction notes

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