Preparation of tri-(m-sulfophenyl)-phosphine

Details Preparation of tri-(m-sulfophenyl)-phosphine Preparation of tri-(m-sulfophenyl)-phosphine

1984-07-30

1987-05-26

Sneed, Helen M. S.

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

Organic compounds

Phosphorus containing

568 13, 568454, C07F 953

Patent

active

046688242

ABSTRACT:
Essentially pure tri-(m-sulfophenyl)-phosphine, well suited as a ligand for the formation of, e.g., rhodium-based olefin hydroformylation catalysts, is facilely prepared by (i) sulfonating triphenylphosphine with oleum, H.sub.2 SO.sub.4 /SO.sub.3, wherein the temperature of sulfonation ranges from 15.degree. to about 25.degree. C., the molar ratio of SO.sub.3 /triphenylphosphine is at least 8, and the amount by weight of SO.sub.3 in the mixture (SO.sub.3 +H.sub.2 SO.sub.4 +triphenylphosphine) at the beginning of said sulfonation reaction is at least 33%; and (ii) thence terminating said sulfonation reaction via hydrolysis of the reaction mixture.

REFERENCES:
patent: 4248802 (1981-02-01), Kuntz
patent: 4346236 (1982-08-01), Lee
patent: 4376870 (1983-03-01), Christopfel et al.
patent: 4394322 (1983-07-01), Beach et al.
patent: 4507247 (1985-03-01), Beach et al.
Chemical Abstracts, 87, 101944n (1977).
Chemical Abstracts, 101, 55331t (1984).

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