139979-78-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139979-78-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,9,7 and 9 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 139979-78:
(8*1)+(7*3)+(6*9)+(5*9)+(4*7)+(3*9)+(2*7)+(1*8)=205
205 % 10 = 5
So 139979-78-5 is a valid CAS Registry Number.
139979-78-5Relevant articles and documents
A facile synthesis of 2-aryltriazolobenzimidazoles
Reddy, B Satyanarayana,Sambaiah, T,Reddy, K Kondal
, p. 191 - 192 (2007/10/02)
2-Aminobenzimidazoles (1) react with benzonitriles in the presence of anhydrous stannic chloride to give N-(benzimidazol-2-yl)arylamidines (2).Oxidative cyclisation of 2 with lead tetraacetate in dry benzene leads to 2-aryltriazolobenzimidaz