516493-74-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 516493-74-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,1,6,4,9 and 3 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 516493-74:
(8*5)+(7*1)+(6*6)+(5*4)+(4*9)+(3*3)+(2*7)+(1*4)=166
166 % 10 = 6
So 516493-74-6 is a valid CAS Registry Number.
516493-74-6Relevant articles and documents
Diastereoselective SmI2-mediated cyclisation of δ-oxo-α,β-unsaturated esters to cyclopropanols
Villar, Hélène,Guibé, Fran?ois
, p. 9517 - 9520 (2002)
In the presence of samarium diiodide and a proton source, δ-oxo-γ,γ-disubstituted-α,β-unsaturated esters readily cyclise with complete diastereocontrol to give anti-cyclopropanol products.