Process for the synthesis of tertiary phosphine oxides, and new tertiary phosphine oxides
AssigneeSociete Nationale des Poudres et Explosifs
InventorsSylvie L. Boileau, Thanh-Dung N'Guyen, Jean-Claude C. Gautier
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Abstract
The invention relates to the synthesis of tertiary phosphine oxides and also to certain tertiary phosphine oxides. According to the invention, an organic phase containing a halogenomethyl derivative, a secondary phosphine oxide and a phase transfer catalyst in an organic medium is reacted with an aqueous phase containing an inorganic base. The halogenomethyl derivative can be a micromolecule or a macromolecule. The tertiary phosphine oxides are substances which are useful, in particular, in fireproofing, in hydrometallurgy and in the field of plant health.
Claims12
Process for the synthesis of tertiary phosphine oxides from a secondary phosphine oxide and a halogenomethyl derivative, in the presence of a base, wherein a secondary phosphine oxide is reacted with a halogenomethyl derivative in an organic medium immiscible with water, in the presence of an aqueous phase containing an inorganic base and in the presence of a phase transfer catalyst and whilst stirring.
A tertiary phosphine oxide of formula:
- ##STR39## in which R.sub.1 and R.sub.2 are identical or different and are a linear or branched alkyl group containing from 1 to 18 carbon atoms, or phenyl and R.sub.3 is a member selected from the group consisting of (a) a phenyl group forming part of one of the units ##STR40## of a random copolymer derived from a random copolymer styrene and a p-halogenomethylstyrene, which has a molecular weight of between 550 and 1, 100,000 and comprises x and y units ##STR41## respectively, x and y being integers such that the ratio x:y is between 100:1 and 0:1, 20 to 90% by number of the R.sub.3 groups being a group ##STR42## and 10 to 80% being a chlorine or bromine atom, and (b) a phenyl forming part of one of the units ##STR43## of a random copolymer derived from a random copolymer of styrene and a p-halogenomethylstyrene, which is partially crosslinked, has a molecular weight of between 1,100 and 1,100,000 and comprises x, y and z units ##STR44##
Dependencies are inferred from the claim text.