Hoechst Aktiengesellschaft

Friedhelm Schwerdtle

Hermann Bieringer

Peter Langeluddeke

Reinhard Handte

Gerhard Horlein

Hans J Nestler

Peter Frisch

Konrad Albrecht

Hans Schumacher

Helmut Nahm

Werner Becker

Heinrich Leditschke

Opticalls active enantiomers of the formula I ##STR1## where R is a group of the formulae ##STR2## R.sub.1 and R.sub.2, among others, are halogen or CF.sub.3 and Z is a carboxyl, carboxylate, carboxylic acid ester, thioester, carbonamide, carboxylic acid anilide, carbohydrazide or thioamide group, are interesting herbicides the effect of which is considerably superior to that of the optically inactive racemates.

Optically active D-pyridyloxy phenoxy propionate herbicides

Optically active enantiomers of the formula I ##STR1## where R is a group of the formulae ##STR2## R.sub.1 and R.sub.2, among others, are halogen or CF.sub.3 and Z is a carboxyl, carboxylate, carboxylic acid ester, thioester, carbonamide, carboxylic acid anilide, carbohydrazide or thioamide group, are interesting herbicides the effect of which is considerably superior to that of the optically inactive racemates.

Optically active herbicidal

Herbicidal compositions, containing as an active ingredient herbicidally effective amounts of phosphinotricine derivatives of the formula ##STR1## in combination with simazin wherein the proportion by weight of the phosphinotricine derivative and simazin is in the range of from 1:1.5 to 1:4, exhibit a synergistic herbicidal effect.

Herbicidal compositions

Herbicidal compositions containing as active substance a combination of at least two of the following components:

Herbicidal esters of D-1-(phenoxy-4-phenoxy)propionic acid

Compositions containing (I) chlorophenoxy-phenoxy-.alpha.-propionic acid (esters) and (II) 3-methoxy-carbonylaminophenyl-N-(3'-methylphenyl)-carbamate as active ingredients are used as synergistic herbicides against grassy and broad-leaf weeds.

Herbicidal agents

Compounds of the formula I ##SPC1## in which R represents hydrogen, halogen, alkyl having 1 to 4 carbon atoms, alkoxy and alkylthio having 1 to 4 carbon atoms, cyclohexyl, cyclopentyl, and phenyl, R.sup.1 represents hydrogen, halogen, alkyl having 1 to 4 carbon atoms, and alkenyl having 2 to 4 carbon atoms, X and Y each are oxygen or sulfur, R.sup.2 represents hydrogen, alkyl having 1 to 10 carbon atoms, alkoxyalkyl having 2 to 6 carbon atoms, alkyl-amino having 2 to 4 carbon atoms, or phenyl, R.sup.3 represents hydrogen or alkyl having 1 to 4 carbon atoms, R.sup.4 represents hydroxyl, --O-alkyl having 1 to 10 carbon atoms, --S-alkyl having 1 to 6 carbon atoms, --O-- alkenyl having 2 to 4 carbon atoms, --O-cyclohexyl, --O-cyclopentyl, a phenoxy or phenylthio radical optionally substituted once or twice with halogen; --NH.sub.2, --NH-alkyl having 1 to 4 carbon atoms, --N,N-dialkyl or ##EQU1## HAVING 1 TO 4 CARBON ATOMS IN EACH ALKYL GROUP, A --NH-phenyl radical substituted with halogen, --CF.sub.3, --OCF.sub.2 CF.sub.2 H, or --COOCH.sub.3, or --O-benzyl, or --NH-benzyl, or --S-benzyl, or --O-cat. wherein cat. stands for the cation of an inorganic or organic base, are valuable selective herbicides.

Growing community of inventors

Frankfurt am Main, Germany

Friedhelm Schwerdtle