Preparation of beta-acyloxy-carboxylic acids and alpha,beta-unsaturated car- boxylic acids by oxidative carbonyl- atton

Abstract

Abstract ETHYLENICALLY UNSATURATED HYDROCARBON OLEFINS ARE REACTED UNDER OXIDATIVE CARBONYLATION CONDITIONS TO PRODUCE A,B-ETHYLENICALLY UNSATURATED CARBOXYLIC ACIDS AND B-ACYLOXY ACIDS WHEREIN THE CARBOXYLIC ACID PORTION HAS ONE MORE CARBON THAN THE OLEFIN, BY CONTACTING THE OLEFIN, OXYGEN AND CARBON MONOIXDE WITH AN ANHYDROUS REACTION MEDIUM CONTAINING A GROUP VII NOBLE METAL AND, AS THE REDOX AGENT THEREOF, A FERRIC SALT SOLUBLE IN THE REACTION MEDIUM AND A SOLUBLE HALIDE. IN A SPECIFIC EMBODIMENT, ETHYLENE IS CONVERTED TO ACRLYIC AND B-ACETOXY PROPIONIC ACID BY OXIDATIVE CARBONYLATION WHEREIN ETHYLENE, OXYGEN AND CARBON MONOXIDE ARE INTRODUCED INTO CONTACT WITH AN ACETIC ACID CONTAINING REACTION MEDIUM WHICH ALSO CONTAINES ABOUT 0.2 WEIGHT PERCENT PALLADIUM CHLORIDE, 0.2 WEIGHT PERCENT LITHIUM CHLORIDE, 0.2 WEIGHT PERCENT FERRIC CHLORIDE AND 0.2 WEIGHT PERCENT LITHIUM ACETATE. THE OXIDATIVE CARBONYLATION PROCEEDS WITHOUT THE NECESSITY FOR INCORPORATING A DEHYDRATING AGENT IN THE REACTION MEDIJM AS IS REQUIRED WITH PREVIOUS OXIDATIVE CARBONYLATIONS.

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