| 摘要 |
The present invention relates to novel herbicidally active and plant growth-regulating glycylmethylphosphinic acid derivatives of the formula <IMAGE> wherein R represents hydrogen, -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 aliphatic 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-substituted 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 I are used as active ingredients of compositions especially for the post-emergent control of weeds or for inhibiting plant growth.
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