Process for preparing acylphosphanes and derivatives thereof

Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus containing

Reexamination Certificate

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C568S010000, C568S015000, C568S017000

Reexamination Certificate

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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.

REFERENCES:
patent: 6399805 (2002-06-01), Wolf et al.
patent: 6888031 (2005-05-01), Leppard et al.
patent: 2005/0028027 (2005-02-01), Kroening et al.
patent: 2006/0229469 (2006-10-01), Huttenloch et al.
patent: 1486986 (2004-04-01), None
patent: 0 040 721 (1981-05-01), None
patent: 00/32612 (2000-06-01), None
Veits et al., Russian Journal of General Chemistry (Translation of Zhurnal Obshchei Khimii) (2000), 70(8), 1237-1239.
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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