77643-59-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 77643-59-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,6,4 and 3 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 77643-59:
(7*7)+(6*7)+(5*6)+(4*4)+(3*3)+(2*5)+(1*9)=165
165 % 10 = 5
So 77643-59-5 is a valid CAS Registry Number.
77643-59-5Relevant articles and documents
A novel strategy for the synthesis of 2,6-diaryl-1,2-dihydropyridines via 6π-electrocyclization
Vincze, Zoltán,Nemes, Péter
, p. 6269 - 6274 (2013/07/25)
Enaminonitriles with α,β-unsaturated aldehydes in a BF 3·OEt2 catalyzed reaction gave stable 1-azatrienes, which could be readily transformed to 1,2-dihydropyridines via 1,6-electrocyclizations.
