172223-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172223-89-1 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, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 172223-89:
(8*1)+(7*7)+(6*2)+(5*2)+(4*2)+(3*3)+(2*8)+(1*9)=121
121 % 10 = 1
So 172223-89-1 is a valid CAS Registry Number.
172223-89-1Relevant articles and documents
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
