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25673-61-4

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25673-61-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25673-61-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,7 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 25673-61:
(7*2)+(6*5)+(5*6)+(4*7)+(3*3)+(2*6)+(1*1)=124
124 % 10 = 4
So 25673-61-4 is a valid CAS Registry Number.

25673-61-4Relevant articles and documents

New Synthesis of Diazepam and the Related 1,4-Benzodiazepines by means of Palladium-Catalyzed Carbonylation

Ishikura, Minoru,Mori, Miwako,Ikeda, Toshihito,Terashima, Masanao,Ban, Yoshio

, p. 2456 - 2461 (2007/10/02)

A new synthesis of diazepam (5) was achieved by application of palladium-catalyzed carbonylation to the compound 3 prepared from o-bromoaniline derivative 1 and the amino acid 2, and this procedure was also used for the synthesis of poisonous metabolites

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