[CH2:1]([C:3]1[O:7][C:6]([C:8]2[CH:15]=[CH:14][C:11]([CH:12]=[O:13])=[CH:10][CH:9]=2)=[N:5][N:4]=1)[CH3:2].[CH:16]([Cl:19])([Cl:18])[Cl:17].[OH-].[K+]>CN(C=O)C.CO>[Cl:17][C:16]([Cl:19])([Cl:18])[CH:12]([C:11]1[CH:14]=[CH:15][C:8]([C:6]2[O:7][C:3]([CH2:1][CH3:2])=[N:4][N:5]=2)=[CH:9][CH:10]=1)[OH:13]To a solution of 4-(5-ethyl-1,3,4-oxadiazol-2-yl)benzaldehyde (1.6 g, 7.9 mmol) in anhydr DMF (7 mL) was added CHCl3 (2.13 g, 17.8 mmol). After cooling to −10° C., a solution of KOH (0.31 g, 5.5 mmol) in anhydr MeOH (1.5 mL) was added dropwise over 20 min. After stirring at −10° C. for 1 hr, the reaction mixture was quenched with 1 M HCl. The solid formed was collected on a Buchner, washed with H2O and dried under vacuum to give 2,2,2-trichloro-1-(4-(5-ethyl-1,3,4-oxadiazol-2-yl)phenyl)ethanol as a white solid (2.0 g, 80% yield).
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