139491-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139491-77-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,9 and 1 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139491-77:
(8*1)+(7*3)+(6*9)+(5*4)+(4*9)+(3*1)+(2*7)+(1*7)=163
163 % 10 = 3
So 139491-77-3 is a valid CAS Registry Number.
139491-77-3Relevant articles and documents
Novel Ring Cleavage Based on Intermolecular Aldol Condensation
Nagumo, Shinji,Matsukuma, Aki,Suemune, Hiroshi,Sakai, Kiyoshi
, p. 10501 - 10510 (1993)
Ring cleavage and reconstruction via intramolecular aldol condensation followed by Grob fragmentation under acetalization conditions (BF3/ethylene glycol) was developed into a novel ring cleavage based on intermolecular aldol condensation.On the basis of
