Process for the manufacture of aliphatylphosphinic acid...

Details Process for the manufacture of aliphatylphosphinic acid... Process for the manufacture of aliphatylphosphinic acid...

C - Chemistry, Metallurgy

07

F

260/458.8

C07F 9/32 (2006.01) C07F 9/48 (2006.01)

Patent

CA 1310976

Process for the manufacture of aliphatylphosphinic acid derivatives Abstract of the Disclosure A process for the production of aliphatylphosphinic acid derivatives, especially of alkyl dialkoxyalkylphosphinates having the formula I Image I in which R is C1-C4-alkyl and R' is hydrogen or C1-C4-alkyl, comprising reacting, in the presence of an acidic catalyst, aqueous phosphinic acid with the corresponding trialkyl orthoester having the formula II: (RO)3CR' II in which R and R' have their previous significances, the amount of the orthoester of formula II used being equal to, or in excess of the stoichiometric amount of both water and phosphinic acid present in the aqueous phosphinic acid reactant.

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