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1428522-78-4

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1428522-78-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1428522-78-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,8,5,2 and 2 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1428522-78:
(9*1)+(8*4)+(7*2)+(6*8)+(5*5)+(4*2)+(3*2)+(2*7)+(1*8)=164
164 % 10 = 4
So 1428522-78-4 is a valid CAS Registry Number.

1428522-78-4Relevant articles and documents

A facile synthesis of tetracyclic benzo-pyridonaphthyridines by domino reaction

Basetti, Vishnu,Pallepati, Rangarao,Hosahalli, Subramanya,Potluri, Vijay

supporting information, p. 2014 - 2017 (2013/04/10)

A novel methodology for the synthesis of tetracyclic benzo- pyridonaphthyridines, forming a C-C and a C-N bond in concentrated sulfuric acid at 70 °C in a one-pot is reported. The key substrates (9a-m) are prepared by reacting 2-chloro-6-(4-fluorophenyl)-4-methylnicotinenitrile (7) with various anilines followed by dimethylformamide dimethylacetal. The domino reaction is initiated by the protonation of the b-carbon of the enamine group in 9a-m and terminated by the elimination of dimethylamine.

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