117506-45-3Relevant articles and documents
Structural reassignment of an 'unusual' derivative of 3-methyl-5-phenylpyrazol-5-one (Edaravone)
Burgess, Jennifer,Steel, Peter J.
, p. 4107 - 4108 (2007/10/03)
The structure of the major product from the reaction of 4-bromo-3-methyl-1-phenylpyrazol-5-one (1) with ethyl cyanoacetate is shown, by means of an X-ray crystal structure determination, to be the spirocyclic compound 4, rather than the previously propose
Syntheses with Nitriles, LXXX. Dicyanomethylenepyrazolinones and Their Chromophoric Properties
Junek, Hans,Klade, Manfred,Sterk, Heinz,Fabian, Walter
, p. 993 - 1010 (2007/10/02)
1-Phenyl-2-pyrazolin-5-ones 1a-e react with tetracyanoethylene forming the corresponding dicyanomethylenepyrazolin-5-ones 2a-e.The products are deeply coloured with absorption bands between 550 and 650 nm, but low ε-values and negative solvatochromic effe