Carbon dioxide assisted hydrolysis of aminophosphonates

Details Carbon dioxide assisted hydrolysis of aminophosphonates Carbon dioxide assisted hydrolysis of aminophosphonates

C - Chemistry, Metallurgy

07

F

C07F 9/38 (2006.01)

Patent

CA 2305466

The invention provides a process for preparing aminophosphonic acids comprising contacting an aminophosphonate ester with a base in the presence of a hydrolysis facilitator selected from the group consisting of CO2, CS2 and COS. In one embodiment, the aminophosphonate ester is first prepared by contacting an amine, trialkylphosphite, base and formaldehyde.

L'invention concerne un procédé de préparation d'acides aminophosphoniques consistant à mettre un ester d'aminophosphonate en contact avec une base en la présence d'un facilitateur d'hydrolyse choisi dans le groupe constitué de CO¿2?, CS¿2? et COS. Dans un mode de réalisation, l'ester d'aminophosphonate est tout d'abord préparé par mise en contact d'une amine, de trialkylphosphite, d'une base et de formaldéhyde.

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