140867-58-9Relevant academic research and scientific papers
Alkaline scission of a urea unit in 5-alkyl-2-amino-N-ureido-3,4-dicyanopyrroles
Lyshchikov,Pul'Kherovskaya,Vasil'Ev,Kayukov,Nasakin
, p. 532 - 536 (2007/10/03)
The scission of the urea group in 5-alkyl-2-amino-3,4-dicyano-N-ureidopyrroles on boiling in KOH solution in DMSO was observed to give 5-alkyl-1,2-diamino-3,4-dicyanopyrroles which were used for the synthesis of pyrrolo[1,2-b][1,2,4] triazepines by reacti
CYCLIZATION OF 1,1,2,2-TETRACYANOETHANE BY THE SEMICARBAZONES AND OXIMES OF CARBONYL COMPOUNDS
Nasakin, O. E.,Lyshchikov, A. N.,Lukin, P. M.,Tafeenko, V. A.,Bulai, A. Kh.,et al.
, p. 837 - 841 (2007/10/02)
1,1,2,2-Tetracyanoethane undergoes cyclization with semicarbazones and oximes with the formation of 5-substituted 2-amino-3,4,4-tricyano-N-ureido(N-hydroxy)-2-pyrrolines.When heated, the latter readily eliminate HCN, forming the corresponding 3,4-dicyano-N-ureidopyrroles.The reaction of the N-ureidopyrroles with benzaldehyde leads to 1,2-di(benzylidenamino)-3,4-dicyanopyrroles.
