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851331-09-4

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851331-09-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 851331-09-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,1,3,3 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 851331-09:
(8*8)+(7*5)+(6*1)+(5*3)+(4*3)+(3*1)+(2*0)+(1*9)=144
144 % 10 = 4
So 851331-09-4 is a valid CAS Registry Number.

851331-09-4Relevant articles and documents

Efficient methods for the synthesis of 2-hydroxyphenazine based on the Pd-catalyzed N-arylation of aryl bromides

Tietze, Mario,Iglesias, Alberto,Merisor, Elena,Conrad, Juergen,Klaiber, Iris,Beifuss, Uwe

, p. 1549 - 1552 (2007/10/03)

(Chemical Equation Presented) Substituted diphenylamines can be synthesized by Pd(0)-catalyzed N-arylation using o-nitroanilines and nitro-substituted aryl bromides for a substrate. Cyclization of the diphenylamines by various methods, including the intramolecular Pd(0)-catalyzed N-arylation, produces 2-methoxyphenazine which can easily be deprotected to give 2-hydroxyphenazine. This phenazine is required to synthesize methanophenazine, a novel redoxactive cofactor isolated from methanogenic archaea.

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