Benzene → 2-[1-Methyl-3-(5-methylsulfonyl-1,3,4-thiadiazol-2-yl)ureido]acetaldehyde
Reaktionsgleichung
[CH3:1][S:2]([C:5]1[S:9][C:8]([N:10]=[C:11]=[O:12])=[N:7][N:6]=1)(=[O:4])=[O:3].C[CH:14]([NH2:17])[CH:15]=[O:16].[CH:18]1C=CC=CC=1>>[CH3:18][N:17]([CH2:14][CH:15]=[O:16])[C:11]([NH:10][C:8]1[S:9][C:5]([S:2]([CH3:1])(=[O:4])=[O:3])=[N:6][N:7]=1)=[O:12]Komponenten
4
Versuchsvorschrift
A mixture of 5-methylsulfonyl-1,3,4-thiadiazol-2-yl isocyanate dimer (0.05 mole), the dimethyl acetal of 2-methyl-aminoacetaldehyde (0.1 mole) and benzene (60 ml) are charged into a glass reaction vessel equipped with a mechanical stirrer and reflux condenser. The reaction mixture is heated at reflux for a period of about 15 minutes. After this time the mixture is stripped of benzene under reduced pressure to yield a solid product as the residue. The residue is then recrystallized to yield the desired product dimethyl acetal of 2-[1-methyl-3-(5-methylsulfonyl-1,3,4-thiadiazol-2-yl)ureido]acetaldehyde.