Benzaldehyde → 5-Benzylidenehydantoin

반응식

NCC(O)=O.C(=O)([O-])[O-].[Na+].[Na+].[CH:12](=O)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.[NH:20]1[CH2:26][C:24](=[O:25])[NH:23][C:21]1=[O:22]>O>[CH:12](=[C:26]1[NH:20][C:21](=[O:22])[NH:23][C:24]1=[O:25])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1

참가 물질

실험 절차

A 37.5 g amount of glycine and 26.5 g of sodium carbonate were dissolved in 200 ml of water in the flask. Then, 53.0 g of benzaldehyde and 50.0 g of hydantoin were added to the resultant solution. The mixture was allowed to react at a temperature of 100° C. for 1 hour while stirring. During the reaction, the pH of the reaction mixture was 9.7 to 9.4. After cooling, the precipitated 5-benzylidene hydantoin was separated and recovered from the reaction mixture. Thus, 83.0 g of 5-benzylidene hydantoin was obtained. The yield was 88% based on the hydantoin.