140429-21-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 140429-21-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,4,2 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 140429-21:
(8*1)+(7*4)+(6*0)+(5*4)+(4*2)+(3*9)+(2*2)+(1*1)=96
96 % 10 = 6
So 140429-21-6 is a valid CAS Registry Number.
140429-21-6Relevant articles and documents
Novel syntheses of heterocycles with N-(1-haloalkyl)azinium halides. Part 2. Preparation of N-unsubstituted 1,4-dihydropyridines
Vanden Eynde,D'Orazio,Mayence,Maquestiau,Anders
, p. 1263 - 1268 (1992)
N-(1-Chloroalkyl)pyridinium chlorides, prepared from thionyl chloride, pyridine, and aldehydes, readily react with enaminocarbonyl derivatives to yield 1,4-dihydropyridines under mild and neutral conditions.
