Preparation and Stability of a New Series of Sterically Hindered Esters of Vitamin A. I

Autor: Forlano, A.J., Jarowski, C.I., Hammer, H.F.
Zdroj: Journal of Pharmaceutical Sciences; July 1968, Vol. 57 Issue: 7 p1184-1187, 4p
Abstrakt: A series of α,α-dialkyl substituted aliphatic esters of vitamin A was prepared. The stability of these compounds was compared with vitamin A palmitate in hydroalcoholic acidic media, alkaline media, and under oxidative conditions. In all cases steric hindrance on the α-carbon of the fatty acid group increased the stability of the esters in solution. Under oxidative conditions it appeared that a long aliphatic chain was necessary for maximal stability. These results indicate that an ester such as vitamin A α,α-dimethylpalmitate could demonstrate optimal stability under all the conditions examined.
Databáze: Supplemental Index