Water → 2-Phenyl-4-(2,6-difluorophenyl)oxazole

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[F:1][C:2]1[CH:11]=[CH:10][CH:9]=[C:8]([F:12])[C:3]=1[C:4](=O)[CH2:5]Br.[C:13]([NH2:21])(=[O:20])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.O>CC1C=CC=CC=1C>[C:14]1([C:13]2[O:20][CH:5]=[C:4]([C:3]3[C:2]([F:1])=[CH:11][CH:10]=[CH:9][C:8]=3[F:12])[N:21]=2)[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

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실험 절차

5.7 g 2,6-difluorophenacyl bromide and 3.63 g benzamide were suspended in 20 ml o-xylene, and the suspension was subjected to reflux under heating for 1.5 hours. After completing the reaction, the suspension reacted was added with water, then extracted with ethyl acetate and further washed with saturated saline solution. The organic layer obtained was dried with anhydrous magnesium sulfate, and the solvent used was removed by distillation under reduced pressure. Out of 7.6 g residue obtained, 1.0 g thereof was purified by using silica gel column chromatography, affording the objective substance in an amount of 0.6 g.