6558-80-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6558-80-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,5 and 8 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6558-80:
(6*6)+(5*5)+(4*5)+(3*8)+(2*8)+(1*0)=121
121 % 10 = 1
So 6558-80-1 is a valid CAS Registry Number.
6558-80-1Relevant articles and documents
Mild preparation of cephalosporin allyl and p-methoxybenzyl esters using diazoalkanes
Waddell, Sherman T.,Santorelli, Gina M.
, p. 1971 - 1974 (2007/10/03)
Vinyl or p-methoxyphenyldiazomethane reacts rapidly with cephalosporins in ether/methylene chloride cosolvent to give the C-9 allyl and p-methoxybenzyl esters, respectively, in good yields, with no isomerization of the double bond to Δ-2.
