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131841-93-5

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131841-93-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131841-93-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,8,4 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131841-93:
(8*1)+(7*3)+(6*1)+(5*8)+(4*4)+(3*1)+(2*9)+(1*3)=115
115 % 10 = 5
So 131841-93-5 is a valid CAS Registry Number.

131841-93-5Relevant articles and documents

ACTIVATED NITRILES IN HETEROCYCLIC SYNTHESIS: A NOVEL SYNTHETIC ROUTE TO FURYL- AND THIENYL-SUBSTITUTED PYRIDINE DERIVATIVES

Elgemeie, Galal Eldin Hamza,Zohdi, Hussein Fouad,Sherif, Sherif Mourad

, p. 215 - 219 (2007/10/02)

A novel synthesis of 2-thio- and 2-oxo- and 2-methoxy-3-cyano-pyridine derivatives utilizing 2-furylmethylene- and 2-thienylmethylene derivatives of acetophenone and activated nitriles as starting components is described.

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