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136773-45-0

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136773-45-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136773-45-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,7,7 and 3 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 136773-45:
(8*1)+(7*3)+(6*6)+(5*7)+(4*7)+(3*3)+(2*4)+(1*5)=150
150 % 10 = 0
So 136773-45-0 is a valid CAS Registry Number.

136773-45-0Relevant articles and documents

Nitriles in Heterocyclic Synthesis: Synthesis of Pyrazolopyrimidine, Pyrazolotriazine and Pyrazolotriazine Derivatives

Elagamey, Abdel Ghani Ali,El-Taweel, Fathy Mohamed Abdel-Aziz

, p. 333 - 338 (2007/10/02)

5-Amino-3-phenylpyrazole (1) reacted with enaminonitriles 2a-c to afford the pyrazolopyrimidines 5a,b and the 5-substituted aminopyrzole 8. 5a reacted with arenediazonium chlorides and benzaldehyde to give 6 and 7 respectively.Also, o-hydroxyacetophenone afforded the fused pyrazole derivative 9 on treatment with 1.Enaminonitrile 3 coupled with 11 and arenediazonium chlorides to give 12 and 13 respectively.Cyclization of 13a,b afforded the pyrazolotriazines 15a,b.

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