Novel herbicidally active, nuclear-substituted phenoxy-phenoxy-alkanecarboxylic acid derivatives and use thereof for controlling grass-like weeds
AssigneeIshihara Sangyo Kaisha, Ltd.
InventorsOtto Rohr, Georg Pissiotas, Beat Bohner
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Abstract
The invention is concerned with new herbicidally active 4-phenoxy-.alpha.-phenoxy-alkanecarboxylic acid derivatives, especially propionic acid esters of the type ##STR1## bearing in the first phenoxy radical a nitro group besides another substituent R.sub.1 which is preferably a halogen atom, the CF.sub.3 group is lower alkyl, alkoxy or alkoxycarbonyl group. The invention is further concerned with herbicidal compositions containing such new derivatives and with methods for the selective control of grass-like weeds in crops of dicotyledonous and monocotyledonous cultivated plants such as cereals.
Claims18
4-phenoxy-.alpha.-phenoxy-alkanecarboxylic acid derivatives of the formula I ##STR19## wherein R.sub.1 represents halogen, CF.sub.3, lower alkyl, lower alkoxy or lower alkylthio,
- R.sub.2 represents hydrogen, halogen or lower alkyl, each of
- R.sub.3 and R.sub.4 independently repesents hydrogen or lower alkyl, and
- R.sub.5 represents C.sub.1 -C.sub.10 alkyloxy, C.sub.2 -C.sub.4 alkenyloxy, C.sub.2 -C.sub.4 alkinyloxy, C.sub.3 -C.sub.12 cycloalkyloxy, benzyloxy or phenoxy optionally substituted by halogen, lower alkyl or nitro.
Methyl 4-(2'-nitro-4'-chloro-phenoxy)-.alpha.-phenoxypropionate.
Methyl 4-(2'-chloro-4'-nitrophenoxy)-.alpha.-phenoxypropionate.
Methyl 4-(2'-nitro-6'-chloro-phenoxy)-.alpha.-phenoxypropionate.
Methyl 4-(2'-nitro-4'-trifluoromethyl-phenoxy)-.alpha.-phenoxypropionate.
Dependencies are inferred from the claim text.