Dimethylformamide → HCID 17861257, compound

HRID 1294206Notes

Reaction equation

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

Participants

Conditions

Temperature: 90 °C

Procedure

A mixture of 4-chloromethyl-5-methyl-2-phenyloxazole (20.18 g), 4-benzyloxyphenol (17.70 g), anhydrous potassium carbonate (12.22 g) and N,N-dimethylformamide (200 mL) was stirred at 90° C. for 15 hrs. The reaction mixture was poured into water, and the precipitated solid was collected by filtration, and dried with air to give crystals (29.03 g, 88%) of 4-[(4-benzyloxyphenoxy)methyl]-5-methyl-2-phenyloxazole. Recrystallization from ethyl acetate-hexane gave colorless leaflet crystals. melting point: 126-127° C. A mixture of the obtained 4-[(4-benzyloxyphenoxy)methyl]-5-methyl-2-phenyloxazole (22.6 g), 5% palladium carbon (10.0 g) and tetrahydrofuran (300 mL) was subjected to catalytic hydrogenation at room temperature and 1 atm. After filtering off the catalyst, the solvent was evaporated under reduced pressure to give crystals (16.3 g, 95%) of 4-[(5-methyl-2-phenyl-4-oxazolyl)methoxy]phenol. Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 168-169° C.

Workup

filtrationthe precipitated solid was collected by filtration
customdried with air

Sources & evidence

ORD record: ord-8c3ff2c0b382475dad9efb19311cb290
Source dataset: uspto-grants-2007_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07238716B2

Reaction notes

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