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1257846-83-5

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1257846-83-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257846-83-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,8,4 and 6 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1257846-83:
(9*1)+(8*2)+(7*5)+(6*7)+(5*8)+(4*4)+(3*6)+(2*8)+(1*3)=195
195 % 10 = 5
So 1257846-83-5 is a valid CAS Registry Number.

1257846-83-5Downstream Products

1257846-83-5Relevant articles and documents

Highly fluorescent, π-extended indenopyrido[2,1-a]isoindolone derivatives prepared by a palladium-catalysed cascade reaction

El Abidine Chamas, Zein,Marchi, Enrico,Modelli, Alberto,Fort, Yves,Ceroni, Paola,Mamane, Victor

supporting information, p. 2316 - 2324 (2013/05/09)

A new family of heterocyclic pentacyclic compounds have been prepared by a cascade reaction involving 2,5-dihalopyridines and (2-formylphenyl)boronic acids. Most of the compounds exhibit high quantum yields of fluorescence in dichloromethane. In some cases, small changes in the substitution pattern caused fluorescence quenching. To rationalize this effect, a detailed photophysical study combined with electrochemical and computational studies was performed on four representative derivatives. It appears that the fluorescence quenching is caused by a thermally activated non-radiative deactivation process that can be prevented in a rigid matrix such as ethanol at 77 K or a PMMA polymer.

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