663192-17-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663192-17-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,1,9 and 2 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 663192-17:
(8*6)+(7*6)+(6*3)+(5*1)+(4*9)+(3*2)+(2*1)+(1*7)=164
164 % 10 = 4
So 663192-17-4 is a valid CAS Registry Number.
663192-17-4Relevant articles and documents
An Improved Access to 4-Trifluoromethyl-2(1H)-quinolinones: The "Watering Protocol"
Marull, Marc,Lefebvre, Olivier,Schlosser, Manfred
, p. 54 - 63 (2004)
Condensation of anilines with ethyl 4,4,4-trifluoroacetoacetate (7) to afford the corresponding 4,4,4-trifluoro-3-oxobutaneanilides (10), precursors to 4-(trifluoromethyl)-2-quinolinones (11), can be favored and the competing condensation to produce the e