Glycylmethylphosphinic acid derivatives, process for their...

C - Chemistry – Metallurgy – 07 – F

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260/501.6, 260/4

C07F 9/30 (2006.01) A01N 57/18 (2006.01) C07F 9/32 (2006.01)

Patent

CA 1118784

Abstract of the Disclosure The present invention relates to novel herbicidally active and plant growth-regulating glycylmethylphosphinic acid derivatives of the formula Image wherein R represents hydropen, -CH2COOH or an easily removable radical (e.g. benzyl, tert-butyl), R' represents a -OH or -OR1 group, in which R1 is a cation, a lower aliphatie radical, cycloalkyl or NH2, R" represents hydrogen, a cation or lower alkyl and R"' represents optionally substituted alkyl or phenyl. These compounds are obtained by reacting a N-substitute. glycine HOOC-CH2-NH-R with formaldehyde and a phosphonous acid Image in a strongly acid solution and optionally removing the radical R by catalytic hydrogenation or with HBr. The compounds of the formula 1 are used as active ingredients of compositions especially for the post-emergent control of weeds or for inhibiting plant growth.

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