128733-19-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128733-19-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,7,3 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 128733-19:
(8*1)+(7*2)+(6*8)+(5*7)+(4*3)+(3*3)+(2*1)+(1*9)=137
137 % 10 = 7
So 128733-19-7 is a valid CAS Registry Number.
128733-19-7Relevant articles and documents
Direct conversion of acetals to esters with high regioselectivity via O,P-acetals
Maegawa, Tomohiro,Otake, Kazuki,Goto, Akihiro,Fujioka, Hiromichi
experimental part, p. 5648 - 5651 (2011/09/15)
A new direct conversion of O,O-acetals to esters via O,P-acetal intermediates was developed. The regioselective cleavage of unsymmetrical cyclic acetals occurred to give the more crowded esters as single isomers.
