Production of n-substituted 2-carbamoyl phosphinic acids

Details Production of n-substituted 2-carbamoyl phosphinic acids Production of n-substituted 2-carbamoyl phosphinic acids

C - Chemistry, Metallurgy

07

F

260/501.6

C07F 9/30 (2006.01)

Patent

CA 1081708

PRODUCTION OF N-SUBSTITUTED 2-CARBAMOYL PHOSPHINIC ACIDS. ABSTRACT OF THE DISCLOSURE: Production of N-substituted 2-carbamoyl phosphinic acids of the general formula: Image (I) in which R1 stands for an alkyl group having 1 to 4 car- bon atoms or an aryl group; R2 and R3 stand independently of each other for an alkyl group having 1 to 4 carbon atoms, an aryl group- or a hydrogen atom; R4 stands for an alkyl group having 1 to 18 carbon atoms, an aryl group or a hydrogen atom; and R5 stands for an alkyl group having 1 to 18 carbon atoms or an aryl group. More specifically, a 2-chloroformyl phosphinic acid chloride of the general formula Image (II) is reacted at 120 to 170°C with an amine of the general formula Image (III) and resulting N-substituted 2-carbamoyl phosphinic acid chloride of the general formula Image (IV) the latter compound being obtained while hydrogen chlo- ride is split off, is hydrolyzed with water.

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