[CH3:1][O:2][C:3]1[CH:25]=[CH:24][C:6]([C:7]([C:9]2[O:10][C:11]3[C:18]([CH2:19][CH2:20][CH3:21])=[CH:17][C:16]([Cl:22])=[C:15]([OH:23])[C:12]=3[C:13]=2[CH3:14])=O)=[CH:5][CH:4]=1.NN.[OH-].[K+]>C(O)CO.O>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH2:7][C:9]2[O:10][C:11]3[C:18]([CH2:19][CH2:20][CH3:21])=[CH:17][C:16]([Cl:22])=[C:15]([OH:23])[C:12]=3[C:13]=2[CH3:14])=[CH:24][CH:25]=1A solution of 2-(p-methoxybenzoyl)-3-methyl-4-hydroxy-5-chloro-7-propylbenzofuran (90 mg; 0.25 mmole), hydrazine (80 μl) and potassium hydroxide (98 mg) in ethylene glycol (2 mL) was heated at 145° C. for a period of 5 hours. The reaction mixture was cooled, poured in water, and extracted with ether. The organic phase was washed with 20% citric acid, with brine, dried (Na2SO4), and concentrated in vacuo. The residue was chromatographed on silica gel using 20% ethylacetate in hexane as eluent to yield 47 mg (50%) of 2-(p-methoxybenzyl)-3-methyl-4hydroxy-5-chloro-7-propylbenzofuran.
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