20109-91-5 Usage
Uses
Used in Pharmaceutical Industry:
(2E,4E)-3-Methyl-5-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2,4-pentadienenitrile is used as an intermediate in the synthesis of Vitamin A2 series and isomers of Retinal (R240000). Its application is primarily for the potential use in vision restoration and reconstitution treatments, as these compounds are essential for maintaining healthy vision and can help in the treatment of certain vision-related conditions.
Check Digit Verification of cas no
The CAS Registry Mumber 20109-91-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,1,0 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20109-91:
(7*2)+(6*0)+(5*1)+(4*0)+(3*9)+(2*9)+(1*1)=65
65 % 10 = 5
So 20109-91-5 is a valid CAS Registry Number.
20109-91-5Relevant academic research and scientific papers
A convenient and stereoselective synthesis of 11Z-3,4-didehydroretinal by Horner-Emmons reaction using diphenyl phosphonate
Wada, Akimori,Wang, Fei,Ito, Masayoshi
, p. 112 - 114 (2008/09/18)
A convenient synthesis of 3,4-didehydroretinal was developed. The Horner-Emmons reaction between 3,4-didehydro-β-ionone and diphenyl phosphonate in the presence of crown ether gave the retinonitrile as an isomeric mixture, in which the newly produced double bond was predominantly 11Z-form. After separation of the 11Z-form retinonitrile, it was converted into the corresponding retinal in good yield without isomerization of the double bonds.
