172223-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172223-91-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,2,2 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 172223-91:
(8*1)+(7*7)+(6*2)+(5*2)+(4*2)+(3*3)+(2*9)+(1*1)=115
115 % 10 = 5
So 172223-91-5 is a valid CAS Registry Number.
172223-91-5Relevant academic research and scientific papers
Intramolecular Nucleophilic Substitution on Nitrogen A New Heterocyclic Synthesis
Sheradsky, Tuvia,Yusupova, Larissa
, p. 7701 - 7704 (2007/10/02)
A series of 5-(diphenylphosphinyloxyamino)valeric acid esters has been prepared.Their treatment with appropriate bases led to cyclization to proline derivatives.The reaction constitutes the first reported case of intramolecular nucleophilic substitution o
