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2933-50-8

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2933-50-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2933-50-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,9,3 and 3 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 2933-50:
(6*2)+(5*9)+(4*3)+(3*3)+(2*5)+(1*0)=88
88 % 10 = 8
So 2933-50-8 is a valid CAS Registry Number.

2933-50-8Relevant articles and documents

A convenient method for the synthesis of 2-amino substituted aza-heterocycles from N,N′-disubstituted thioureas using TsCl/NaOH

Heinelt, Uwe,Schultheis, Daniela,J?ger, Siegfried,Lindenmaier, Marion,Pollex, Annett,Beckmann, Henning S.G.

, p. 9883 - 9888 (2007/10/03)

p-Toluenesulfonyl chloride (TsCl)/NaOH has been introduced as reagent combination for the synthesis of 2-amino-oxa- or 2-amino-thiazolidines from N-(2-hydroxyethyl)-thioureas, but its general application in heterocycle synthesis has not been investigated. In this paper the convenient and efficient synthesis of a variety of 2-amino-substituted 1-aza 3-(aza, oxo or thio) heterocycles of different substitution and ring sizes is described. The application of polymer-supported TsCl facilitates work-up and renders the reaction conditions very suitable for parallel or robot synthesis. Graphical Abstract

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