Patent ID: 7250535

Claim:
A process for producing tertiary phosphine represented by the following formula (3), comprising allowing a dialkylphosphinous halide represented by the following formula (1) to react with a Grignard reagent represented by the following formula (2) in the presence of a copper compound in an amount corresponding to 0.1 to 5% by mol based on the dialkylphosphinous halide represented by the formula (1); wherein R 1 and R 2 are each independently a tertiary hydrocarbon group of 4 to 13 carbon atoms, and X is a chlorine atom or a bromine atom; R 3 MgX′ (2) wherein R 3 is a straight-chain or branched alkyl group, an alkenyl group, an alkynyl group, a cycloalkyl group, an aralkyl group, a lower alkoxy lower alkyl group, and X′ is a chlorine atom, a bromine atom or an iodine atom; wherein R 1 , R 2 and R 3 have the same meanings as defined above.