634924-71-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 634924-71-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,4,9,2 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 634924-71:
(8*6)+(7*3)+(6*4)+(5*9)+(4*2)+(3*4)+(2*7)+(1*1)=173
173 % 10 = 3
So 634924-71-3 is a valid CAS Registry Number.
634924-71-3Relevant articles and documents
Asymmetric synthesis of (R)- and (S)-2-trifluoromethylepinephrine
Dong, Lun-Cong,Crowe, Michael,West, Jonathan,Ammann, Jeffrey R.
, p. 2731 - 2733 (2007/10/03)
An asymmetric synthesis of (R)- and (S)-2-trifluoromethylepinephrine (1R and 1S) is presented. Trifluoromethylation involves nucleophilic aromatic substitution of halobenzene 4 most likely via a copper mediated CF3 anion equivalent generated in
