109773-41-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109773-41-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,7 and 3 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109773-41:
(8*1)+(7*0)+(6*9)+(5*7)+(4*7)+(3*3)+(2*4)+(1*1)=143
143 % 10 = 3
So 109773-41-3 is a valid CAS Registry Number.
109773-41-3Relevant articles and documents
A New Facile Synthesis of 4-Oxo-1,4-dihydrocinnolines
Baldoli, Clara,Licandro, Emanuela,Maiorana, Stefano,Menta, Ernesto,Papagni, Antonio
, p. 288 - 290 (2007/10/02)
2-(2-Aminoaryl)-2-oxo-triphenylphosphoniumethylides 2a-d, readily available by standard procedures, are converted into 4-oxo-1,4-dihydrocinnolines 7a-d by treatment with nitrous acid and subsequent basic hydrolysis of the intermediate phosphoranes 6a-d.
