[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[Se:9][C:10]([CH2:13][OH:14])=[CH:11][N:12]=2)=[CH:4][CH:3]=1.[H-].[Na+].Cl[C:18]1[CH:24]2[CH2:25][CH:21]([CH2:22][CH2:23]2)[C:20](=[O:26])[CH:19]=1>O1CCCC1>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[Se:9][C:10]([CH2:13][O:14][C:18]3[CH:24]4[CH2:25][CH:21]([CH2:22][CH2:23]4)[C:20](=[O:26])[CH:19]=3)=[CH:11][N:12]=2)=[CH:6][CH:7]=1To a solution of [2-(4-chlorophenyl)selenazol-5-yl]methanol (300 mg, 1.1 mmol) in dry tetrahydrofuran (5 ml) is added, in one portion, sodium hydride (60% dispersion in mineral oil, 44 mg, 1.1 mmol). The reaction mixture is stirred for 5 minutes at room temperature and 4-chlorobicyclo[3.2.1]oct-3-en-2-one (172 mg, 1.1 mmol) is added in one-portion. The reaction mixture is stirred at room temperature overnight. Silica gel is added to the crude reaction mixture, the solvent is evaporated under reduced pressure and the residue is purified by flash chromatography on silica gel to give 4-[2-(4-chlorophenyl)selenazol-5-ylmethoxy]bicyclo[3.2.1]oct-3-en-2-one (275 mg).
Wird geladen…
