Benzaldehyde → 1-(Benzylideneamino)piperazine-2,3-dione
Reaktionsgleichung
[NH2:1][N:2]1[CH2:7][CH2:6][NH:5][C:4](=[O:8])[C:3]1=[O:9].[CH:10](=O)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1>C(O)(=O)C>[CH:10](=[N:1][N:2]1[CH2:7][CH2:6][NH:5][C:4](=[O:8])[C:3]1=[O:9])[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
1.3 pts. by wt. of 1-amino-2,3-dioxo-piperazine, 1.3 pts. by wt. of benzaldehyde and 7 pts. by vol. of glacial acetic acid are warmed to 90° for 90 minutes and then left at 5° for 30 minutes. The precipitate is filtered off, washed first with 3 pts. by vol. of glacial acetic acid and then with three times 10 pts. by vol. of ethyl acetate and dried over P2O5. 1.75 pts. by wt. (81.8% ) of 1-benzylideneamino-2,3-dioxo-piperazine of melting point 236°-240° C. are obtained.