The present invention relates to novel herbicidally active and plant growth-regulating glycylmethylphosphinic acid derivatives of the formula ##STR1## wherein R represents hydrogen, --CH.sub.2 COOH or an easily removable radical (e.g. benzyl, tert-butyl), R' represents a --OH or --OR.sub.1 group, in which R.sub.1 is a cation, a lower aliphatic radical, cycloalkyl or NH.sub.2, 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--CH.sub.2 --NH--R with formaldehyde and a phosphonous acid ##STR2## 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.
本发明涉及新型具有除草活性和植物生长调节作用的甘
氨酸甲基
磷酸酯衍
生物,其
化学式为##STR1##
其中R代表氢、--CH.sub.2 COOH或易于去除的基团(例如苄基、叔丁基),R'代表--OH或--OR.sub.1基团,其中R.sub.1为阳离子、较低的脂肪基、环烷基或NH.sub.2,R"代表氢、阳离子或较低的烷基,R'"代表可选取代的烷基或苯基。这些化合物是通过将N-取代的甘
氨酸HOOC--CH.sub.2 --NH--R与
甲醛和
膦酸##STR2##在强酸溶液中反应,并可选择性地通过催化氢化或用HBr去除基团R而获得的。式I的化合物被用作组合物的活性成分,特别用于后出苗期对杂草的控制或抑制植物生长。