Process for making glyphosate by oxidizing n-substituted...

C - Chemistry – Metallurgy – 07 – F

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C07F 15/00 (2006.01) B01J 23/38 (2006.01) B01J 31/22 (2006.01) C07F 9/38 (2006.01)

Patent

CA 2275866

This invention is directed to process for making a composition having the formula (I): <formula I> wherein R3, R4, and R5 are independently hydrogen, substituted or unsubstituted hydrocarhyl, or an agronomically acceptable cation. The process comprises contacting a solution with a noble metal catalyst and introducing oxygen into the solution. the solution contains an N-substituted glyphosate having the formula (II): <formula II> wherein R1 and R2 are independently hydrogen, halogen, -PO3H2, -SO3H, -NO2, or substituted or unsubstituted hydrocarbyl other than -CO2H. R3, R4, and R5 are as defined for formula (I). This invention also relates to an oxidation catalyst comprising a noble metal having a hydraphobic electroactive molecular species adsorbed thereon,

L'invention concerne un procédé d'obtention d'une composition de formule (I), dans laquelle R<3>, R<4> et R<5> sont indépendamment un hydrogène, hydrocarbyle substitué ou non substitué ou un cation agronomiquement acceptable. Le procédé consiste à mettre une solution en contact avec un catalyseur à métal noble et à introduire de l'oxygène dans la solution. La solution renferme un glyphosate N-substitué de formule (II), dans laquelle R<1> et R<2> sont indépendamment un hydrogène, halogène, -PO3H2, -SO3H2, -NO2 ou hydrocarbyle substitué ou non substitué autre que -CO2H. R<3>, R<4> et R<5> sont tels que définis dans la formule (I). L'invention concerne aussi un catalyseur d'oxydation comprenant un métal noble ayant une espèce moléculaire électroactive hydrophobe adsorbée sur celui-ci.

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