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5440-71-1

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5440-71-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5440-71-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,4,4 and 0 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5440-71:
(6*5)+(5*4)+(4*4)+(3*0)+(2*7)+(1*1)=81
81 % 10 = 1
So 5440-71-1 is a valid CAS Registry Number.

5440-71-1Relevant articles and documents

Tricyclic aromatic ketones by cycliacylation of carboxylic acid derivatives of indan, tetralin, and benzosuberane

Isabelle, M. Elaine,Wightman, Robert H.,Avdovich, Hajro W.,Laycock, David E.

, p. 1344 - 1349 (2007/10/02)

The synthesis of a homologous series of new carboxylic acids substituted in the α-position of indan, tetralin, and benzosuberane is accomplished using an efficient general procedure.Cycliacylation of these acids and their corresponding β-isomers produces a complete series of tricyclic aromatic ketones.

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