136801-71-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136801-71-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,0 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 136801-71:
(8*1)+(7*3)+(6*6)+(5*8)+(4*0)+(3*1)+(2*7)+(1*1)=123
123 % 10 = 3
So 136801-71-3 is a valid CAS Registry Number.
136801-71-3Relevant articles and documents
A convenient synthesis of Quinazoline ring by tandem aza-Wittig reaction/electrocyclic ring closure
Rossi,Calabrese,Farma
, p. 5819 - 5834 (2007/10/02)
3,4-D-Dihydroquinazolines and Quinazolines were prepared starting from N'-aryl-N-(triphenylphosphoranilidene)-carboximidamides and aliphatic or aromatic aldehydes. The mechanism of the reaction is discussed.