84028-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 84028-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,0,2 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 84028-81:
(7*8)+(6*4)+(5*0)+(4*2)+(3*8)+(2*8)+(1*1)=129
129 % 10 = 9
So 84028-81-9 is a valid CAS Registry Number.
84028-81-9Relevant academic research and scientific papers
Methyl 5-(Triphenylphosphoranylidene)levulinate: A Reagent for Homologation of Aldehydes to δ-Ene γ-Keto Esters
Ronald, Robert C.,Wheeler, Carl J.
, p. 138 - 139 (2007/10/02)
Methyl 5-(triphenylphosphoranylidene)levulinate has been synthesized and shown to condense with aldehydes to afford E δ-ene γ-keto esters in good yield.
