172839-53-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172839-53-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,8,3 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 172839-53:
(8*1)+(7*7)+(6*2)+(5*8)+(4*3)+(3*9)+(2*5)+(1*3)=161
161 % 10 = 1
So 172839-53-1 is a valid CAS Registry Number.
172839-53-1Relevant articles and documents
Catalysis and regioselectivity in the Michael addition of azoles. Kinetic vs. thermodynamic control
Horvath, Andras
, p. 4423 - 4426 (2007/10/03)
Bicyclic guanidine bases, TBD and MTBD were found to be high]y efficient catalysts in the Michael addition of azoles with α,β-unsaturated nitriles and esters. The factors influencing regioselectivity have been elucidated, and some new azole-Michael adduct
