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84531-20-4

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84531-20-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84531-20-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,5,3 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 84531-20:
(7*8)+(6*4)+(5*5)+(4*3)+(3*1)+(2*2)+(1*0)=124
124 % 10 = 4
So 84531-20-4 is a valid CAS Registry Number.

84531-20-4Relevant articles and documents

Reactions of Formylchromone Derivatives. Part 5. Transformations of 3-Formylchromones into Pyrroles and Pyridines

Clarke, Paul D.,Fitton, Alan O.,Kosmirak, Mario,Suschitzky, Hans,Suschitzky, John L.

, p. 1747 - 1756 (2007/10/02)

4-Oxo-4H-1-benzopyran-3-carbaldehyde (3-formylchromone) (1) was treated with various bifunctional nucleophiles.With ethyl aminoethanoate it gave a mixture of ethyl 4-(2-hydroxybenzoyl)-6-(4-oxo-4H-1-benzopyran-3-yl)pyridine-2-carboxylate (2) and ethyl 4-(

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