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Priority to KR7501785ApriorityCriticalpatent/KR790000687B1/en
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Title compd. (I; R = H, Me, Et, n = 0,1,2, X = Me, nitro, Cl, Br), useful as herbicides and plant growth controller, was prepd. by reaction of substituted phenylhydrazine with ester or amide of N-phosphonomethylglycine. Thus, 3,66g methyl N-phosphonomethyl glycinate and 9.0g phenyl hydrazine were heated for 2.5hr. The resulting viscous reddish crude oil was crystallized and filtered by adding ethyl ether. The crystalline ppts. were recrystallized with heated acetic acid to give I.
KR7501785A1975-08-151975-08-15Process for preparation n-phosphonomethyl clycine phenyl hzdrazides
KR790000687B1
(en)
O-phenyl-thiono-phosphoric -phosphonic- acid ester-amide and ester-imide derivatives processes for their preparation and their use as insecticides and acaricides
Herbicidal pyridinesulfonylisothioureas, preparation and use thereof, compositions containing them, intermediates for preparing them and preparation of such intermediates