反应详情

2.0 g of 5-hydroxy-1-cyclohexylhydantoin were dissolved in 30 ml of methanol containing 600 mg of sodim methoxide. 20 minutes thereafter, 0.7 ml of methyl iodide were added dropwise to the solution and the reaction was continued at 50° C. for 1 hour. The solvent was removed by distillation and the residue was purified by thin layer chromatography on silica gel (ethyl acetate:hexane=1:1). The obtained crude product was recrystallized from benzene to give 500 mg of 5-hydroxy-1-cyclohexyl-3-methylhydantoin (compound 21) in the form of colorless needle crystals.

1. customThe solvent was removed by distillation
2. customthe residue was purified by thin layer chromatography on silica gel (ethyl acetate:hexane=1:1)
3. customThe obtained crude product
4. customwas recrystallized from benzene