1257841-69-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1257841-69-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,8,4 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1257841-69:
(9*1)+(8*2)+(7*5)+(6*7)+(5*8)+(4*4)+(3*1)+(2*6)+(1*9)=182
182 % 10 = 2
So 1257841-69-2 is a valid CAS Registry Number.
1257841-69-2Relevant articles and documents
Selective deprotection and amidation of 2-pyridyl esters via N-methylation
Yamada, Shinji,Abe, Misato
experimental part, p. 8667 - 8671 (2011/01/04)
The 2-pyridyl residue serves as a protecting group for various carboxylic acids. The protecting group is selectively cleaved under mild conditions via N-methylation of the pyridyl group. During the deprotection process, the various functional groups as we
