[C:1]1([C:7]2[N:8]=[C:9]([S:18][C:19]([F:24])([F:23])[CH:20]([F:22])[F:21])[NH:10][C:11]=2[C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[ClH:25]>CCOCC.O1CCCC1>[ClH:25].[C:12]1([C:11]2[N:10]=[C:9]([S:18][C:19]([F:23])([F:24])[CH:20]([F:22])[F:21])[NH:8][C:7]=2[C:1]2[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=2)[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=1A solution of 5.0 g of 4,5-diphenyl-2-(1,1,2,2-tetrafluoroethylthio)imidazole (Example 18) in a mixture of ether and tetrahydrofuran was treated with dry hydrogen chloride gas and a precipitate was collected by filtration to give 4.7 g of 4,5-diphenyl-2-(1,1,2,2-tetrafluoroethylthio)imidazole hydrochloride, m.p. 192°-202°.
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