Cas 142231-72-9,1H-Pyrazol-4-ol, 5-[(4-bromophenyl)azo]-1-phenyl-3-(phenylsulfonyl)-

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Check Digit Verification of cas no

The CAS Registry Mumber 142231-72-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,2,3 and 1 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 142231-72:
(8*1)+(7*4)+(6*2)+(5*2)+(4*3)+(3*1)+(2*7)+(1*2)=89
89 % 10 = 9
So 142231-72-9 is a valid CAS Registry Number.

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142231-72-9Relevant academic research and scientific papers

Synthesis of 1-Aryl-5-arylazo-3-phenylsulfonylpyrazol-4-ols from 1-Chloro-3-phenylsulfonyl-2-propanone

Takahashi, Masahiko,Oshida, Takeshi

, p. 543 - 545 (2007/10/02)

Treatment of 1-chloro-3-phenylsulfonyl-2-propanone (2) with arenediazonium chlorides gave 1-arylhydrazono-3-chloro-1-phenylsulfonyl-2-propanones 4, which were cyclized in the presence of sodium acetate to 1-aryl-3-phenylsulfonylpyrazol-4-ols 5B.Further tr

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