摘要:
A process for the production of 2,3,5-trimethylhydroquinone diesters by aromatization of 2,6,6-trimethyl-2-cyclohexene-1,4-dione (4-oxoisophorone, ketoisophorone, KIP) with an acylating agent and an acidic soluble or insoluble catalyst, which process may be operated alternatively continuously or discontinuously. The process includes the following steps: a) a carboxylic anhydride having a C1 to C4 alkyl residue is used as the acylating agent, b) after the reaction, a proportion of the resultant carboxylic acid is optionally removed by distillation, c) the reaction solution is cooled, d) the product which has crystallized out is separated and washed, and e) the filtrate is returned to step a).
摘要:
Fatty acid esters of alkylene glycols corresponding to the formula R1COO(AlkO)nH are thickeners for aqueous surfactant solutions, particularly for personal care products.
摘要:
The electrical resistivity of hindered polyol ester lubricants can be raised to very high levels by treating the lubricants with activated alumina, preferably after the acid values of the lubricants treated have already been reduced to low levels by conventional refining with alkali or other acid scavengers.
摘要:
The pharmaceutical and/or cosmetic compositions for treatment of obesity and/or overweight contain an effective amount of a fatty-acid monoester of an estrogen and a fatty acid wherein the estrogen is estrone, diethylstilbestrol, estriol, estradiol or ethinyl estradiol and the fatty acid is oleic, linoleic, linolenic, stearic, palmitic, palmitoleic or arachidonic acids. The fatty-acid monoesters mimic the function of estrone monooleate, as a signal that informs the brain of the size of fat tissue mass. In preferred pharmaceutical and/or cosmetic compositions for intravenous injection the monoester is incorporated in a lipidic suspension, prepared from lipoproteins or from liposome components, such as soy oil and egg phospholipids. When administered to rats with a 15% of total adipose tissue, they produce weight reduction of about 10%, by a new and unexpected mechanism. They are useful for the treatment of obesity and/or overweight in mammals, with the advantages of high efficacy and low toxicity. New substantially pure fatty-acid monoesters including estrone monooleate and diethylstilbestrol monooleate are also described.
摘要:
The present invention is concerned with new derivatives of erythrodiol of the general formula: ##STR1## wherein R' is a hydrogen atom or an acyl radical derived from a mono- or polycarboxylic acid and R is a radical derived from a monocarboxylic acid containing 3 or more carbon atoms or from a polycarboxylic acid, any carboxylic acid groups therein being in the free form or in the salt form.
摘要:
When vicinal glycol esters are prepared by the liquid phase reaction of (a) ethylene or propylene, (b) molecular oxygen and (c) a carboxylic acid in the presence of a catalyst system which is tellurium cation plus bromide anion or selenium cation plus chloride anion or selenium cation plus bromide anion, significant improvements in selectivity and operability are obtained by employing, in conjunction with these catalyst systems, a basicity control cation of specified characteristics. This cation is employed in an amount at least sufficient to provide at least 0.05 equivalent of cation per gram-atom of halogen present.
摘要:
BISMONOCARBOXYLIC ESTERS OF 3-FORMYLBUTANEDIOL-1,2 AND THEIR PRODUCTION BY REACTION OF BISMONOCARBOXYLIC ESTERS OF BUTENE-1-DIOL-3,4 WITH CARBON MONOXIDE AND HYDROGEN IN THE PRESENCE OF CARBONYL COMPLEXES OF RHODIUM AT ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE. BISMONOCARBOXYLIC ESTERS OF 3-FORMYLBUTANEDIOL-1,2 ARE USED FOR THE PRODUCTION OF B-FORMYLCROTYL ESTERS WHICH ARE VALUABLE STARTING MATERIALS FOR THE PRODUCTION OF VITAMIN A ESTERS.
摘要:
Asymmetrical di(1-acyloxyaliphatic) ethers produced by reacting a symmetrical di(1-acyloxyaliphatic) ether or a 1,2-ethylenically unsaturated aliphatic 1-acyloxyaliphatic ether with a monocarboxylic acid.