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1240492-71-0

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1240492-71-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240492-71-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,4,9 and 2 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1240492-71:
(9*1)+(8*2)+(7*4)+(6*0)+(5*4)+(4*9)+(3*2)+(2*7)+(1*1)=130
130 % 10 = 0
So 1240492-71-0 is a valid CAS Registry Number.

1240492-71-0Relevant articles and documents

Regioselective synthesis of novel functionalized phosphanylidene anthra[2,1-b]furan derivatives under solvent-free conditions

Nourmohammadian, Farahnaz,Gholami, Mahnaz Davoudzadeh

experimental part, p. 340 - 346 (2010/07/05)

A convenient and efficient, regioselective, solvent-free procedure has been developed to react 2,6-dihydroxyanthraquinone, dialkyl acetylenedicarboxylates, and triphenylphosphine in one-pot, to afford novel phosphanylidene anthracenyl derivatives 3a-c, which at 90°C due to intramolecular nucleophilic attack formed novel phosphanylidene anthra[2,1-b]furans 4a-c in good yield.

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