5-Methylfurfural → 1-(5-Methyl-furfurylideneamino)-2,3-dioxo-piperazine
Reaction equation
[NH2:1][N:2]1[CH2:7][CH2:6][NH:5][C:4](=[O:8])[C:3]1=[O:9].[CH3:10][C:11]1[O:17][C:14]([CH:15]=O)=[CH:13][CH:12]=1>C(O)(=O)C>[CH3:15][C:14]1[O:17][C:11]([CH:10]=[N:1][N:2]2[CH2:7][CH2:6][NH:5][C:4](=[O:8])[C:3]2=[O:9])=[CH:12][CH:13]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
1.3 pts. by wt. of 1-amino-2,3-dioxo-piperazine, 1.3 pts. by wt. of 5-methyl-furfural and 7 pts. by vol. of glacial acetic acid are warmed to 90° C. for 10 minutes and then left for 30 minutes at RT. The precipitate is filtered off, washed first with 3 pts. by vol. of glacial acetic acid and then three times with 10 pts. by vol. of ethyl acetate and dried in air. 1.7 pts. by wt. (76.6%) of 1-(5-methyl-furfurylideneamino)-2,3-dioxo-piperazine of decomp. pt. 245°-8° C. are obtained.