[Cl:1][C:2]1[C:13]([CH:14]([F:16])[F:15])=[CH:12][CH:11]=[CH:10][C:3]=1[O:4][CH:5]([CH2:8][CH3:9])[C:6]#[N:7].[CH2:17](N)[CH2:18][NH2:19].[S-]SS[S-].[Na+].[Na+]>O>[Cl:1][C:2]1[C:13]([CH:14]([F:15])[F:16])=[CH:12][CH:11]=[CH:10][C:3]=1[O:4][CH:5]([C:6]1[NH:19][CH2:18][CH2:17][N:7]=1)[CH2:8][CH3:9]A mixture of 2-(2-chloro-3-difluoromethyl-phenoxy)-butyronitrile (300 mg, 1.2 mmol), ethylene diamine (0.33 ml, 4.9 mmol) and sodium tetrasulfide (11 mg, 0.1 mmol) was stirred for 2 hrs at 50° C., then cooled to room temperature. Cold water (0° C.) was added to the reaction mixture. The resultant suspension was stirred for ca 15 minutes and then filtered, washed and dried to yield 2-[1-(2-chloro-3-difluoromethyl-phenoxy)-propyl]-4,5-dihydro-1H-imidazole (m.p. 96-97° C.); 1H-NMR (D6-DMSO) 1.0, t, 3H, 1.8-2.0 m, 2H; 3.42 vbr s, 4H, 4.8, dd, 1H, 6.51, br s, 1H, 7.2, t, 1H, 7.25, d, 1H, 7.32, d, 1H, 7.43, t, 1H.
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