申请人:Ciba-Geigy Corporation
公开号:US04233056A1
公开(公告)日:1980-11-11
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。