Process for preparing acylphosphanes and derivatives thereof

Details Process for preparing acylphosphanes and derivatives thereof Process for preparing acylphosphanes and derivatives thereof

2004-07-09

2008-10-21

Puttlitz, Karl J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus containing

C568S010000, C568S015000, C568S017000

Reexamination Certificate

active

07439401

ABSTRACT:
The present invention relates to a new, selective process for the preparation of mono- and bisacylphosphanes of formula (I) n and m are each independently of the other 1 or 2; R1, if n=1, is e.g. phenyl R1, if n=2, is e.g. C1-C18alkylene or phenylene; R2is e. g. C1-C18alkyl, phenyl or substituted phenyl; R3is e. g. C1-C18alkyl, by (1) reacting a phosphorous halide of formula IIa or a phosphorous halide oxide of formula (IIb) or a phosphorous halide sulfide of formula (IIc) with an alkali metal in a solvent in the presence of a proton source; (2) subsequent reaction with m acid halides of formula (III) An oxidation step may follow to obtain mono- and bisacylphosphane oxides or mono- and bisacylphosphane sulfides.

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Derwent Abst. No. 1981-91349D [50] of EP 0 040 721.
F. Pass et al., Monatshefte Fur Chemie, Vo. 90, 1959, pp. 148-156 and English language abstract thereof.
K. Issleib et al. Che. Ber.vol. 92, (1959), pp. 3183-3189 and English language abstract thereof.

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