Thermal decomposition of allyl perfluoro-2-methyl-3-oxahexanoate and perfluoro-2,5-dimethyl-3,6-dioxanonanoate could be catalyzed by Pd(PPh3)4, generating the fluorinated carbanions which are protonated to give e.g. C3F7OCF(CF3)CHF or reacted with substituted benzoyl chlorides to produce the corresponding ketones. The Me esters of the above fluoroalkanoic acids also reacted with the substituted benzoyl chlorides in the presence of catalytic amts. of Pd(0) to yield the ketones. The latter reaction may involve the oxidative addition of benzoyl chlorides to Pd(0).

Key words: FURAN P, CARBOXYLIC ACID ESTER, TRIPHENYLPHOSPHINE, OXYGEN HETEROCYCLICS, PALLADIUM COMPOUNDS, BENZOYL CHLORIDE P, CARBANION, PERFLUORO-HYDROCARBON