344437-62-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 344437-62-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,4,3 and 7 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 344437-62:
(8*3)+(7*4)+(6*4)+(5*4)+(4*3)+(3*7)+(2*6)+(1*2)=143
143 % 10 = 3
So 344437-62-3 is a valid CAS Registry Number.
344437-62-3Relevant articles and documents
KETAL CLAISEN REARRANGEMENTS OF FUNCTIONALIZED KETALS
Daub, G. WIlliam,Lunt, Sharon R.
, p. 4397 - 4400 (2007/10/02)
Functionalized ketals participate successfully in the acid-catalyzed ketal Claisen rearrangement to afford mixtures of the isomeric γ,δ-unsaturated ketones, with the more highly substituted isomer predominating by a factor of 2-4:1.
