42197-34-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42197-34-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,1,9 and 7 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 42197-34:
(7*4)+(6*2)+(5*1)+(4*9)+(3*7)+(2*3)+(1*4)=112
112 % 10 = 2
So 42197-34-2 is a valid CAS Registry Number.
42197-34-2Relevant articles and documents
The conversion of primary amines into nitrones: an extension of the Kroehnke reaction
Katritzky, Alan R.,Dabbas, Nadira,Patel, Ranjan C.,Cozens, Andrew J.
, p. 51 - 54 (2007/10/02)
Primary amines react with 2-(ethoxycarbonyl)-4,6-diphenylpyryliums to form pyridiniums.These are hydrolysed to 2-carboxylatopyridiniums which react with p-nitroso-N,N-dimethylaniline to give nitrones.