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Ethyl (4Z)-4-(2-phenylhydrazono)-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate is a complex organic compound with the molecular formula C18H16N4O3. It is a derivative of pyrazole, a heterocyclic compound with a five-membered ring containing three nitrogen atoms. The molecule features a phenyl group attached to the pyrazole ring, a hydrazone functional group, and a carboxylate group. ethyl (4Z)-4-(2-phenylhydrazono)-4,5-dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate is characterized by its conjugated double bond (Z-configuration) and a dihydro structure, which contributes to its unique chemical properties. It is typically synthesized through a series of chemical reactions and is used in various applications, such as in pharmaceuticals and as a building block for more complex organic molecules.

7171-33-7

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7171-33-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 7171-33-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,7 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 7171-33:
(6*7)+(5*1)+(4*7)+(3*1)+(2*3)+(1*3)=87
87 % 10 = 7
So 7171-33-7 is a valid CAS Registry Number.

7171-33-7Downstream Products

7171-33-7Relevant academic research and scientific papers

Viable and straightforward approach to the preparation of water soluble pyrazol-5-one derivatives through glycoconjugation

Bianchini, Roberto,Bonanni, Marco,Corsi, Massimo,Infantino, Angela Simona

, p. 8636 - 8644 (2012/10/29)

The synthesis of water soluble pyrazol-5-one azo-dyes has been achieved. 6′-Aminolactosetriacetonide 9 was selected as the key building block to glyconjugate the pyrazole ring at its 3 position via a carboxamide or via a benzeneamide moiety in position 1 of the heterocycle. Diethyl-3-oxopentandionate 2 led eventually to a bicyclic compound, hampering the glyconjugation coupling process. The values of the molar extinction coefficients (ε) confirmed the tendency of pyrazolone azo dyes to exist in their tautomeric hydrazo form (especially in polar solvents); whereas the presence of substituents on the phenylazo group influenced the visible absorption maxima negligibly.

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