194923-90-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 194923-90-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,9,2 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 194923-90:
(8*1)+(7*9)+(6*4)+(5*9)+(4*2)+(3*3)+(2*9)+(1*0)=175
175 % 10 = 5
So 194923-90-5 is a valid CAS Registry Number.
194923-90-5Relevant articles and documents
Macrocycle opening in crown ethers 3. * Transformation of 4′-nitrobenzocrown ethers into podands in the reaction with methylamine
Gromov,Dmitrieva,Krasnovsky
, p. 519 - 522 (1997)
A method for the synthesis of nitrogen-containing podands from 4′-nitrobenzocrown ethers was developed. It involves nucleophilic regioselective cleavage of the macrocycle upon heating with MeNH2.