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505087-28-5

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505087-28-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 505087-28-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,5,0,8 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 505087-28:
(8*5)+(7*0)+(6*5)+(5*0)+(4*8)+(3*7)+(2*2)+(1*8)=135
135 % 10 = 5
So 505087-28-5 is a valid CAS Registry Number.

505087-28-5Relevant articles and documents

Synthesis and antitumor activities of 2-(substituted)phenyl-1,2,4- triazolo[1,5-a]pyridines

Zhang, Guolin,Hu, Yongzhou

, p. 919 - 922 (2008/03/29)

(Chemical Equation Presented) Twenty-three 2-(substituted)phenyl-1,2,4- triazolo[1,5-a]pyridines have been synthesized by cyclo-additison reaction between N-amino methylpyridinium mesitylenesulfonates and substituted benzonitriles under the presence of po

Regioselection in 1,3-dipolar cycloadditions of 3-methylpyridine N-imide to aromatic carbonitriles. Synthesis of 2-aryl-8-methyl[1,2,4]triazolo [1,5-a]pyridines

Guolin, Zhang,Yongzhou, Hu

, p. 560 - 561 (2007/10/03)

1-Amino-3-methylpyridinium mesitylenesulfonate (3) reacts with aromatic nitriles in the presence of potassium hydroxide, undergoing 1,3-dipolar cycloaddition followed by elimination of H2 to give 2-aryl-8-methyl[1,2,4]triazolo[1,5-a]pyridines as the major products, rather than the 6-methyl isomers.

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