272777-08-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 272777-08-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,2,7,7 and 7 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 272777-08:
(8*2)+(7*7)+(6*2)+(5*7)+(4*7)+(3*7)+(2*0)+(1*8)=169
169 % 10 = 9
So 272777-08-9 is a valid CAS Registry Number.
272777-08-9Relevant articles and documents
Chlorosulfonation of flavones
Silva, Ana M.G.,Tome, Augusto C.,Silva, Artur M.S.,Cavaleiro, Jose A.S.
, p. 113 - 124 (1998)
The chlorosulfonation of flavone and 4′-methoxyflavone with chlorosulfonic acid occurs regioselectively in ring B. The chlorosulfonyl flavones were converted into their corresponding sulfonamides and sulfonates by reaction with alkylamines, anilines, isop
