139439-27-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139439-27-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,3 and 9 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139439-27:
(8*1)+(7*3)+(6*9)+(5*4)+(4*3)+(3*9)+(2*2)+(1*7)=153
153 % 10 = 3
So 139439-27-3 is a valid CAS Registry Number.
139439-27-3Relevant academic research and scientific papers
Synthesis of 1-arylamino-5-alkoxycarbonyl-1H-tetrazoles
Bruche,Garanti,Zecchi
, p. 309 - 314 (2007/10/02)
Some 1-arylamino-5-alkoxycarbonyl-1H-tetrazoles (III) were prepared, the key synthetic step being the 1,5-electrocyclic closure of C-azidoimines (II) under thionyl chloride catalysis.
