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3(α-hydroxymethylene-α-formylmethyl)-1-phenyl-4-acetyl-2-pyrazolin-5-thione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128256-55-3

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128256-55-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128256-55-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,2,5 and 6 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128256-55:
(8*1)+(7*2)+(6*8)+(5*2)+(4*5)+(3*6)+(2*5)+(1*5)=133
133 % 10 = 3
So 128256-55-3 is a valid CAS Registry Number.

128256-55-3Downstream Products

128256-55-3Relevant academic research and scientific papers

STUDIES ON THE VILSMEIER-HAACK REACTION. PART IV. SYNTHESIS AND REACTION OF SOME 3-METHYL-1-PHENYL-4-(ACETYL; IMINOACETYL AND THIOACETYL)-2-PYRAZOLIN-5-THIONE

Awad, Ibrahim M. A.,Hassan, Khairy M.

, p. 311 - 317 (2007/10/02)

Three derivatives of 5-thiopyrazolone (3-5) have been synthesized.The 3-methyl group in each of these derivatives has been found to undergo diformylation by Vilsmeier reagent to give the corresponding aminoacroleins (6-8).Treatment of 6-8 with some reagents affords the related thiopyrazolone derivatives (12-29) with different heterocyclic systems at the 3-position.

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