21719-63-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21719-63-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,1 and 9 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21719-63:
(7*2)+(6*1)+(5*7)+(4*1)+(3*9)+(2*6)+(1*3)=101
101 % 10 = 1
So 21719-63-1 is a valid CAS Registry Number.
InChI:InChI=1/C13H10Cl2N2/c14-11-7-6-10(13(15)8-11)9-16-17-12-4-2-1-3-5-12/h1-9,17H
21719-63-1Relevant academic research and scientific papers
Divergent construction of pyrazoles via Michael addition of n -arylhydrazones to 1,2-diaza-1,3-dienes
Mantenuto, Serena,Mantellini, Fabio,Favi, Gianfranco,Attanasi, Orazio A.
supporting information, p. 2014 - 2017 (2015/04/27)
The base (NaH)-promoted Michael addition of N-arylhydrazones (AHs) with 1,2-diaza-1,3-dienes (DDs) produces unprecedented β-azohydrazone adducts. Strategically, the use of AHs as acyl anion equivalents (d1 synthon) and DDs as α-electrophiles (a