128455-70-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128455-70-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,4,5 and 5 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 128455-70:
(8*1)+(7*2)+(6*8)+(5*4)+(4*5)+(3*5)+(2*7)+(1*0)=139
139 % 10 = 9
So 128455-70-9 is a valid CAS Registry Number.
128455-70-9Relevant academic research and scientific papers
BASE CATALYZED CYCLIZATION OF 1-(2'-HYDROXY-PHENYL)-2-YNONES: A NEW PATHWAY TO THE CHROMONE SKELETON
Pflieger, Dominique,Muckensturm, Bernard
, p. 2299 - 2300 (2007/10/02)
2-n-Butyl chromone is synthesized by an efficient method starting from salicylaldehyde.The key step uses cyclization of an aromatic hydroxy-ynone.Some sensitive intermediates need to be protected as methylthiomethyl-ethers.
