[C:1]1([C:7]2([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=3)[NH:11][C:10](=[S:12])[NH:9][C:8]2=[O:13])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:20](=O)([O-])[O-].[Na+].[Na+].IC>C(O)C>[C:14]1([C:7]2([C:1]3[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=3)[NH:11][CH:10]([S:12][CH3:20])[NH:9][C:8]2=[O:13])[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=17.0 g of 5,5-diphenyl-2-thiohydantoin is dissolved in 50 ml of ethanol and 10 ml of 3N sodium carbonate added followed by 3 ml of iodomethane. The mixture is refluxed for 18 hours, then cooled and the solvent evaporated. The residual solid is recrystallized from ethanol to give 4.6 g (60%) of the title compound.
Wird geladen…