119908-91-7Relevant academic research and scientific papers
Reaction of N1, N2-diarylamidines with 2-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene) propanedinitrile
Gomaa
, p. 387 - 389 (2007/10/03)
2-Arylamino-2-(3-methyl-5-oxo-1-phenyl-1,5-dihydro-4H-pyrazol-4-ylidene) ethanenitriles (6a-c) together with the corresponding formanilides (7a-c) are formed in the reaction of N1, N2-diarylformamidines (1a-c) with 2-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene)propanedinitrile (2). The analogous N1, N2-diarylacet-amidines (8b-d) with 2 gave 5-oxospiro[(1,5-dihydro-4H-pyrazole)-4,4′- (1′,2′,3′,4′-tetrahydropyridine)] -5′-carbonitriles (17b-d) and in two cases 2-arylamino-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-ylidene) ethanenitriles (6b,c) together with the acetanilides (12b,c), which were obtained as minor products.
α-Arylamino-cyanomethylene-pyrazolinones from Azomethine Dyes and Malonodinitrile
Hennig, L.,Mann, G.,Schellenberg, C.,Franke, K.
, p. 368 - 370 (2007/10/02)
The reaction of azomethine dyes (1a-g) with malonodinitrile (2) gives dicyanomethylene-pyrazolin-5-one (4) which immediately reacts with the eliminated anilines by HCN-amine exchange giving the deeply coloured arylamino-cyanomethylene-pyrazolinones (5a-g).Structural investigations and a study of the absorption characteristic are described.
Reactions of 4-(Dicyanomethylene)-3-methyl-1-phenyl-2-pyrazolin-5-one Towards Amines and Phenols
Metwally, Saoud A. M.,Naggar, Galal M. El,Younis, Mansour I.,El-Emary, Talaat I.,Elnagdi, Mohamed Hilmy
, p. 1037 - 1040 (2007/10/02)
3-Methyl-1-phenyl-2-pyrazoline-4,5-dione (3) condenses readily with malononitrile in refluxing ethanol to yield 4-(dicyanomethylene)-3-methyl-1-phenyl-2-pyrazolin-5-one (4).Compound 4 readily reacts with aliphatic, aromatic, and heterocyclic amines to yie
