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499240-97-0

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499240-97-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 499240-97-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,9,2,4 and 0 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 499240-97:
(8*4)+(7*9)+(6*9)+(5*2)+(4*4)+(3*0)+(2*9)+(1*7)=200
200 % 10 = 0
So 499240-97-0 is a valid CAS Registry Number.

499240-97-0Relevant articles and documents

Practical synthesis of 8-acyl-7-alkyl-1,6-naphthyridin-5(6H)-ones

Valès, Magali,Lokshin, Vladimir,Pèpe, Gérard,Guglielmetti, Robert,Samat, André

, p. 8543 - 8551 (2007/10/03)

Reaction of a set of enaminones with 2-chloronicotinoyl chloride or 2,6-dichloro-5-fluoronicotinoyl chloride mainly leads to N-acylation products which cyclize directly or reacting with sodium hydride to give 8-acyl-7-alkyl-1,6-naphthyridin-5(6H)-ones. Due to their easy availability these compounds are attractive precursors for synthesis of polycondensed heterocycles like naphtho[2,3-h][1,6]naphthyridin-5-ones and pyrido[3,2-c][1,6]naphthyridin-6-ones.

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