139954-30-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139954-30-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,9,5 and 4 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 139954-30:
(8*1)+(7*3)+(6*9)+(5*9)+(4*5)+(3*4)+(2*3)+(1*0)=166
166 % 10 = 6
So 139954-30-6 is a valid CAS Registry Number.
139954-30-6Relevant 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