O-Cresol → 1,3-Dimethyl-5-(phenylaminocarbonyl methylene)-hydantoin
Reaktionsgleichung
[C:1]1([N:7]2[C:11](=[O:12])[CH:10]=[CH:9][C:8]2=[O:13])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:14][NH:15][C:16]([NH:18][CH3:19])=[O:17].C1(C)C(O)=CC=CC=1>>[CH3:14][N:15]1[C:9](=[CH:10][C:11]([NH:7][C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)=[O:12])[C:8](=[O:13])[N:18]([CH3:19])[C:16]1=[O:17]Komponenten
4
Versuchsvorschrift
A solution of 17.3 parts of N-phenyl maleic imide and 8.8 parts of N,N'-dimethyl urea in 100 parts of cresol is stirred for three hours at 190° C. The solvent is distilled off in vacuo and the residue fractionated. The oily liquid which distills at a boiling point of 220° C./0.1 Torr solidifies after a while and may be recrystallised from n-propanol (Mp. 114°-115° C.). IR and NMR-spectra confirm the assumed compound.
Aufarbeitung
- distillation