Ester pyrolysis

The ester pyrolysis is a reaction of the organic chemistry - in more detail an elimination reaction - and provides a route for the preparation of olefins from carboxylic acid esters dar. Esterpyrolysen are typically at 300-500 ° C in the gas phase takes place, wherein no solvent is required. An application running under milder reaction conditions, alternative to ester pyrolysis is the Chugaev reaction.

Mechanism

For the pyrolysis of a carboxylic acid ester 1, the carboxylic acid ester has to contain a β - hydrogen atom, the reaction will not engage with the methyl esters. The reaction proceeds by an egg - mechanism in the same time leave both leaving groups, the substrate molecule and together form a bond. That's why it is a syn-elimination, which proceeds via a six -membered transition state 2. It caused the alkene, the carboxylic acid 3 and 4