139541-89-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139541-89-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,5,4 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139541-89:
(8*1)+(7*3)+(6*9)+(5*5)+(4*4)+(3*1)+(2*8)+(1*9)=152
152 % 10 = 2
So 139541-89-2 is a valid CAS Registry Number.
139541-89-2Relevant academic research and scientific papers
Ambiphilic allenyl enolates: Reactions with electrophiles
Lee,Shih,Hulce
, p. 185 - 188 (2007/10/02)
Allenyl enolates generated from 1,6 additions of organocopper reagents to 3-ethynyl-2-cycloalkenones act as ambident α,γ-nucleophiles. The γ:α ratio of products is a function of carbon hybridization, steric environment, and cycloalkenone ring size; typically, γ-products predominate.
