Formation of styrene phosphonic acid

Details Formation of styrene phosphonic acid Formation of styrene phosphonic acid

1997-05-02

1998-07-21

Rotman, Alan L.

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

Organic compounds

Phosphorus acids or salts thereof

C07F 938

Patent

active

057837309

ABSTRACT:
Styrene phosphonic acid (SPA) can be formed the reaction of phosphorous acid with acetophenone, preferably in the presence of a Lewis acid catalyst, to form a hydroxy adduct intermediate thereof which is then reacted with acetic anhydride to form the acyl derivative of the hydroxy adduct, followed by removal of an acetic acid moiety therefrom, preferably in the presence of an acidic catalyst, to form the styrene phosphonic acid product.

REFERENCES:
patent: 2694684 (1954-11-01), Rogers et al.
patent: 3501556 (1970-03-01), Weil et al.
patent: 4486357 (1984-12-01), Krause
patent: 4507249 (1985-03-01), Pieper et al.
patent: 5132444 (1992-07-01), Northemann et al.
patent: 5391816 (1995-02-01), Tomko
CA:103:37610 abs of DE3323392, Jan. 1985.

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