Abstract:
New and valuable chrysanthemumates, particularly esters having triunsaturated alcohols, and a process for controlling pests with these esters.
Abstract:
Process for the preparation of granular vitamin A esters by contacting the molten vitamin A esters with a cold organic liquid kept in motion.
Abstract:
Continuous production of axerophthol by reaction of axerophthyl acetate with a lower alcohol using guanidine as transesterification catalyst in two stages, alkyl acetate and some of the excess alcohol being distilled off in the first stage and the remainder of the alcohol being removed in the second stage by distillation with a hydrocarbon as entrainer.
Abstract:
Vitamin A palmitate is prepared from vitamin A alcohol and palmitoyl chloride in the presence of a tertiary amine in a continuous process in which vitamin A palmitate is obtained in high purity and almost quantitative yields.
Abstract:
Disclosed are new vinylphenol derivatives of the formula I where A is a methylene or ethylene radical which is unsubstituted or substituted by C1-C4-alkyl, R1 and R each hydrogen or methyl, R3 is hydrogen, C1-C4-alkyl, C1-C4-alkoxy or halogen, R4 is hydrogen, C1-C4-alkyl, cyclopropyl or cyclobutyl, R5 and R7 are each hydrogen or -OR8, where R8 is hydrogen, C1-C4-alkyl or C1-C4-alkanoyl, and R6 is hydrogen or is C1-C4-alkyl which is unsubstituted or substituted by carboxyl, C1-C4-alkoxycarbonyl, hydroxyl, C1-C4-alkoxy and/or amino or mono- or di-C1-C4-alkylamino, or is C1-C20-alkanoyl or is benzoyl which is unsubstituted or substituted as described for the C1-C4-alkyl group, or is aralkyl which is unsubstituted or similarly substituted in the aryl moiety, and R6 and R8 together may furthermore form a radical C=O, C=S, -CH2CH2- or CR9R10 , where R9 and R10 are each hydrogen, C1-C4-alkyl or phenyl, and their physiologically tolerated salts. These derivatives are for the treatment of various disorders of the skin, the mucous membranes and the internal organs, and of rheumatic disorder.