HCID 3042139, Verbindung → HCID 12255293, Verbindung
Reaktionsgleichung
[C:1]([C:5]1[NH:6][C:7]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[C:8]2[C:13]=1[C:12](=[O:14])[NH:11][C:10](=[O:15])[NH:9]2)([O:3][CH3:4])=[O:2].NC1C([C:28](OC)=[O:29])=C(C(OC)=O)NC=1C1C=CC=CC=1.[N-]=C=O.[Na+]>>[C:12]([C:13]1[C:8]([NH:9][C:10]([NH2:11])=[O:15])=[C:7]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[NH:6][C:5]=1[C:1]([O:3][CH3:4])=[O:2])([O:29][CH3:28])=[O:14]Komponenten
4
Versuchsvorschrift
5-Carbomethoxy-7-phenyl-6H-pyrrolo[3,4-d]pyrimidine-2,4(1H,3H)-dione, from 3-amino-4,5-dicarbomethoxy-2-phenyl-pyrrole and sodium isocyanate. The intermediate 4,5-dicarbomethoxy-2-phenyl-3-ureido-pyrrole is isolated. M.p. 246°-8° C (from methanol/water). Yield of the title compound 88.5%. M.p. 320°-7° C. (from methanol/water).