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90776-75-3

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90776-75-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90776-75-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,7,7 and 6 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 90776-75:
(7*9)+(6*0)+(5*7)+(4*7)+(3*6)+(2*7)+(1*5)=163
163 % 10 = 3
So 90776-75-3 is a valid CAS Registry Number.

90776-75-3Relevant articles and documents

CONDENSATION DU CYANOACETATE D'ETHYLE SODE SUR LES SELS D'IMINOETHERS CYCLIQUES. SYNTHESE DIRECTE DE DERIVES D'OXAZEPINE-1,4 ONE-7

Dreme, M.,Brunel, S.,Llauro, M. F.,Perchec, P. Le,Garapon, J.,Sillion, B.

, p. 349 - 354 (2007/10/02)

Sodium ethylcyanoacetate was found to react exclusively at the 2-position of trifluormethanesulfonate 2-alkyl(aryl) 1,3-oxazolinium salts 2.In most cases, the reaction leads specifically to a new series of 5-alkyl(aryl) 6-cyano 2,3-dihydro 1,4-oxazepine 7-ones 3.This efficient one-step ring-enlargement process occurs at the oxazolidin stage.Structural parameters affecting the scope and limitations of this condensation are discussed.

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