557111-97-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 557111-97-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,1,1 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 557111-97:
(8*5)+(7*5)+(6*7)+(5*1)+(4*1)+(3*1)+(2*9)+(1*7)=154
154 % 10 = 4
So 557111-97-4 is a valid CAS Registry Number.
557111-97-4Relevant articles and documents
First regioselective ortho-lithiation induced by a 2-chloropyridyl group complexation
Fort, Yves,Rodriguez, Alain L.
, p. 4918 - 4922 (2003)
It is shown that t-BuLi in Et2O promotes an exclusive regioselective metalation of 2-aryl-6-chloropyridine compounds at the aromatic ortho position demonstrating that the 2-chloropyridyl moiety may be considered as a directing group. This funct
