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634202-39-4

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634202-39-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 634202-39-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,4,2,0 and 2 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 634202-39:
(8*6)+(7*3)+(6*4)+(5*2)+(4*0)+(3*2)+(2*3)+(1*9)=124
124 % 10 = 4
So 634202-39-4 is a valid CAS Registry Number.

634202-39-4Relevant articles and documents

New access to oxazolopyridines via hydroxyamidine derivatives; application to quinolines

Garnier, Ethel,Blanchard, Stephanie,Rodriguez, Ivan,Jarry, Christian,Leger, Jean-Michel,Caubere, Paul,Guillaumet, Gerald

, p. 2033 - 2040 (2007/10/03)

Several 2-aryl and 2-heteroaryloxazolo[4,5-b]pyridines were synthesised in high yields from zwitterion or hydroxyamidine derivatives by heating in dimethylacetamide. These intermediates were generated via hetarynic reaction with the complex base NaNH2-t-BuONa (5:2). The same reactions were possible with quinoline derivatives.

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