[OH:1][C:2]1[C:15]2[C:14](=[O:16])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[S:7][C:6]=2[C:5]([OH:17])=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:25][CH2:26][Cl:27]>CC(C)=O>[Cl:27][CH:26]([O:1][C:2]1[C:15]2[C:14](=[O:16])[C:13]3[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=3)[S:7][C:6]=2[C:5]([OH:17])=[CH:4][CH:3]=1)[CH3:25]A solution of 120 mg of 1,4-dihydroxythioxanthone in 100 ml of acetone is stirred for 0.5 h at room temperature with 138 mg of potassium carbonate. A solution of 80 mg of 1-bromo-2-chloroethane in 5 ml of acetone is then added and the mixture refluxed for 24 h. The heterogeneous mixture is cooled, filtered, concentrated under reduced pressure and purified by silica gel column chromatography using a 1:1 mixture of hexanes and ethyl acetate to produce 100 mg of a yellow-red crystals (65%).
Loading…
