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81374-77-8

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81374-77-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81374-77-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,7 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81374-77:
(7*8)+(6*1)+(5*3)+(4*7)+(3*4)+(2*7)+(1*7)=138
138 % 10 = 8
So 81374-77-8 is a valid CAS Registry Number.

81374-77-8Relevant articles and documents

DIPHENYLHYDROXYMETHYLATION OF 2-METHYLPYRIDINE N-OXIDE BY KETYLS AND DIANIONS OF BENZOPHENONE

Kurbatova, A. S.,Kurbatov, Yu. V.,Niyazova, D. A.,Atayan, P. S.

, p. 168 - 170 (2007/10/02)

In the reaction of 2-methylpyridine N-oxide with the lithium ketyl and the dianion of benzophenone the products from diphenylhydroxymethylation in the side chain, i.e., 2-(1-hydroxy-1,1-diphenylethyl)pyridine N-oxide, and in the ring, i.e., 2-methyl-6-(diphenylhydroxymethyl)pyridine N-oxide, are formed.The product from reductive diphenylhydroxymethylation in the methyl group, i.e., 2-(1-hydroxy-1,1-diphenylethyl)pyridine, is formed preferentially in the reactions with the ketyl and the dianion of benzophenone.The condensation with the sodium ketyl and the dianion of benzophenone takes place similarly and leads to significantly lower yields of the products.

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