Ester pyrolysis
The ester pyrolysis is a reaction of the organic chemistry - in more detail one elimination reaction - and provides a way for the production of olefins from Carbonsäureestern represents Esterpyrolysen find typically at 300-500 ° C in the gas phase, wherein no solvent is required.. An alternative to ester pyrolysis that takes place under milder reaction conditions is the Chugayev reaction .
mechanism
For the pyrolysis of a carboxylic acid ester 1 , the carboxylic acid ester must contain a β-hydrogen atom, so the reaction does not work with methyl esters. The reaction proceeds according to an E i mechanism, in which both groups leave the substrate molecule at the same time and form a bond with one another. This is why it is a syn elimination that takes place via a six-membered transition state 2 . The alkene 3 and the carboxylic acid 4 are formed .
See also
Individual evidence
- ↑ a b T. Laue and A. Plagens: Name and keyword reactions of organic chemistry , 5th edition, Teubner Studienbücher Chemie, 2006, p. 119, ISBN 3-8351-0091-2 .
- ^ Siegfried Hauptmann : Reaction and Mechanism in Organic Chemistry , BG Teubner, Stuttgart, 1991, p. 130, ISBN 3-519-03515-4 .