215649-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 215649-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,5,6,4 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 215649-81:
(8*2)+(7*1)+(6*5)+(5*6)+(4*4)+(3*9)+(2*8)+(1*1)=143
143 % 10 = 3
So 215649-81-3 is a valid CAS Registry Number.
InChI:InChI=1/C10H11BrN2O.ClH/c11-8-2-1-3-9(6-8)13-5-4-12-7-10(13)14;/h1-3,6,12H,4-5,7H2;1H
215649-81-3Relevant academic research and scientific papers
Efficient synthesis of N-arylpiperazinones via a selective intramolecular Mitsunobu cyclodehydration
Weissman, Steven A.,Lewis, Stephanie,Askin, David,Volante,Reider, Paul J.
, p. 7459 - 7462 (2007/10/03)
A practical two pot synthesis of N-arylpiperazinones from the corresponding aniline is described. The key transformation is a selective intramolecular Mitsunobu cyclodehydration of an amidoalcohol intermediate. A series of N-arylpiperazinones were prepared in yields up to 89%.
