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19553-23-2

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19553-23-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19553-23-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,5,5 and 3 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 19553-23:
(7*1)+(6*9)+(5*5)+(4*5)+(3*3)+(2*2)+(1*3)=122
122 % 10 = 2
So 19553-23-2 is a valid CAS Registry Number.

19553-23-2Relevant 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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