83719-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83719-57-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,7,1 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 83719-57:
(7*8)+(6*3)+(5*7)+(4*1)+(3*9)+(2*5)+(1*7)=157
157 % 10 = 7
So 83719-57-7 is a valid CAS Registry Number.
83719-57-7Relevant academic research and scientific papers
Tandem Cope-Claisen Rearrangement: Scope and Stereochemistry
Ziegler, Frederick E.,Piwinski, John J.
, p. 7181 - 7190 (2007/10/02)
The complete details of the seminal study on the tandem Cope-Claisen rearrangement are presented.The reaction uses an initial Cope rearrangement to trigger an irreversible Claisen rearrangement.In several cases, the Claisen step drives an unfavorable Cope
