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51226-42-7

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51226-42-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51226-42-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,2,2 and 6 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 51226-42:
(7*5)+(6*1)+(5*2)+(4*2)+(3*6)+(2*4)+(1*2)=87
87 % 10 = 7
So 51226-42-7 is a valid CAS Registry Number.

51226-42-7Relevant articles and documents

Synthetic utilization of polynitroaromatic compounds. 1. S-derivatization of 1-substituted 2,4,6-trinitrobenzenes with thiols

Zlotin,Kislitsin,Samet,Serebryakov,Konyushkin,Semenov,Buchanan III,Gakh

, p. 8430 - 8438 (2007/10/03)

Reactions of 1-R-2,4,6-trinitrobenenes (R = alkyl, protected aldehyde, aminocarbonyl, cyano groups, or isoxazole ring) with thiol salts were investigated. In most cases, these reactions gave a mixture of minor para and major ortho substitution products. Reactions of N,N-disubstituted 2,4,6-trinitrobenzamides with S-,O-, and N-nucleophiles afforded products of substitution of the p-nitro group exclusively. 1-Cyano-2,4,6-trinitrobenzene was found to be the most reactive and the least selective: all three nitro groups can be substituted using an excess of thiol salts. 2-R-4,6-dinitrobenzamides showed no regioselectivity under similar conditions to yield 1:1 mixtures of para and ortho isomers.

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