HUT62549A - Process for producing conjugated dienecarboxylic acid esters
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Process for producing conjugated dienecarboxylic acid esters
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Publication number
HUT62549A
HUT62549AHU360091AHU360091AHUT62549AHU T62549 AHUT62549 AHU T62549AHU 360091 AHU360091 AHU 360091AHU 360091 AHU360091 AHU 360091AHU T62549 AHUT62549 AHU T62549A
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Application filed by Egyt Gyogyszervegyeszeti GyarfiledCriticalEgyt Gyogyszervegyeszeti Gyar
Priority to HU360091ApriorityCriticalpatent/HU208518B/en
Publication of HU913600D0publicationCriticalpatent/HU913600D0/en
Publication of HUT62549ApublicationCriticalpatent/HUT62549A/en
Publication of HU208518BpublicationCriticalpatent/HU208518B/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Abstract
Conjugated-diene-carboxylic-acid-esters of general formula (I) are prepd. by esterification of carboxylic acids of general formula (II) in the presence of a quat. ammonium-salt and/or polyethylene-glycol in an anhydrous aliphatic hydrocarbon solvent and in the presence of a strong inorganic base, by an alkyl-halide of general formula R-X (X1). Substituents in formulae (I) and (II) are as follows: R1:1-5C alkyl gps., Z1: H atom or 1-5C alkoxy gp. and Z2 a H atom or Z1 and Z2 together form a double bond and X in formula (IX) is a halogen atom.
HU360091A1991-11-191991-11-19Process for producing conjugated diene-carboxylic esters
HU208518B
(en)
PHARMACEUTICAL COMPOSITIONS BASED ON MERCAPTOETHANESULPHONIC ACIDS, ORGANIC COMBATINGS OF MERCAPTOETHANESULPHONIC ACIDS AND METHOD FOR THE PRODUCTION THEREOF.