Retention Indices and Enthalpies of Sorption of Esters of Neopentyl Glycol on DB-1 Stationary Phase
作者:O. D. Lukina、E. L. Krasnykh、S. V. Portnova、S. V. Levanova
DOI:10.1134/s0036024420030188
日期:2020.3
The logarithmic retention indices and the enthalpies of sorption at the average temperature of an experiment and 298.2 K are determined via gas-liquid chromatography using DB-1 stationary phase for esters of neopentyl glycol and C-2-C-6 monobasic carboxylic acids of linear and branched structure at 423.2-523.2 K. The temperature dependences of the studied compounds' retention indices are obtained, and the linearity of these dependences in the investigated range of temperatures is demonstrated. The values obtained for the enthalpies of sorption are analyzed.
Bochkova,V.A. et al., Journal of applied chemistry of the USSR, 1973, vol. 46, # 8, p. 1929 - 1932
作者:Bochkova,V.A. et al.
DOI:——
日期:——
Cosmetic composition comprising a particular ester, and uses thereof
申请人:Arnaud Pascal
公开号:US20070190003A1
公开(公告)日:2007-08-16
The invention relates to a composition comprising a physiologically acceptable medium containing a fatty phase comprising at least one ester resulting from the reaction of a polyol with a carboxylic acid of formula (I) below:
in which R
1
, R
2
and R
3
are radicals independently chosen from optionally functionalized alkyl, aryl and aralkyl radicals, and combinations thereof.
The invention also relates to the use of an ester of formula (I) above in a cosmetic composition with staying power properties, especially of the colour, and/or gloss and/or comfort and/or migration resistance properties.
Improved Procedure for the Reductive Acetylation of Acyclic Esters and a New Synthesis of Ethers
作者:David J. Kopecky、Scott D. Rychnovsky
DOI:10.1021/jo9914521
日期:2000.1.1
acetylation procedure allows a wide variety of esters to be converted into the corresponding alpha-acetoxy ethers in good to excellent yields. It was found that, under mild acidic conditions, many alpha-acetoxy ethers can be further reduced to the corresponding ethers. This net two-step ester deoxygenation is an attractive alternative to the classical Williamson synthesis for certain ethers.