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83256-53-5

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83256-53-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83256-53-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,2,5 and 6 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 83256-53:
(7*8)+(6*3)+(5*2)+(4*5)+(3*6)+(2*5)+(1*3)=135
135 % 10 = 5
So 83256-53-5 is a valid CAS Registry Number.

83256-53-5Relevant articles and documents

INTRAMOLECULAR CYCLIZATION OF N-PHTHALYL-β-ARYL-β-ALANINE PHENYLHYDRAZIDE

Portnov, Yu. N.,Zabrodnyaya, V. G.,Voronin, V. G.,Kost, A. N.

, p. 703 - 706 (2007/10/02)

The reaction of N-phthalyl-β-aryl-β-alanine N'-methyl-N'-phenylhydrazides with phosphorus oxychloride (at cca 80 deg C) is accompanied by further transformations of the initially formed 2-aminoindole derivatives and leads to isoindolopyrimidoindole derivatives.Intermediate 2-aminoindoles were isolated at lower reaction temperatures.The hydrolysis of the isoindolopyrimidoindole derivatives was studied.The structures of the compounds obtained were established on the basis of the PMR, IR, and UV spectra and the results of elementary analysis.

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