Cas 189759-53-3,Phenol, 4-[[(4-methylphenyl)sulfonyl]methyl]-3-nitro-, 4-methylbenzenesulfonate (ester)

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Check Digit Verification of cas no

The CAS Registry Mumber 189759-53-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,7,5 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 189759-53:
(8*1)+(7*8)+(6*9)+(5*7)+(4*5)+(3*9)+(2*5)+(1*3)=213
213 % 10 = 3
So 189759-53-3 is a valid CAS Registry Number.

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189759-53-3Relevant academic research and scientific papers

Vicarious nucleophilic substitution of hydrogen in nitrophenyl toluenesulfonates

Makosza, Mieczyslaw,Ziobrowski, Tadeusz,Serebriakov, Mikhail,Kwast, Andrzej

, p. 4739 - 4750 (2007/10/03)

Toluenesulfonates of nitrophenols react with carbanions possessing leaving groups giving products of the vicarious nucleophilic substitution of hydrogen. The yields and orientation depend on the reaction conditions and the structure of the reagents. The products obtained can be easily hydrolyxed to the corresponding phenols or - in certain cases - to hydroxynitrobenzaldehydes.

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