摘要:
Novel ureas of the formula I have herbicidal activity and are suitable in small applied amounts for selectively combating weeds in cultivated crops of soya-bean, maize and cereals. They are advantgeously produced by the isocyanate method and correspond to the formula I ##STR1## wherein R.sub.1 is an unsubstituted or substituted C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.2 -C.sub.6 -alkynyl, aralkyl, phenyl, acyl or C.sub.1 -C.sub.4 -alkylsulfonyl group or an aminoalkyl group,R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,R.sub.3 is hydrogen, halogen, cyano or trifluoromethyl,R.sub.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl, C.sub.2 -C.sub.6 -alkynyl or C.sub.1 -C.sub.6 -alkoxy,R.sub.5 is hydrogen, C.sub.1 -C.sub.6 -alkyl or C.sub.2 -C.sub.6 -alkenyl, or R.sub.5 together with R.sub.4 and the nitrogen atom to which they are bound also form a 5-6-membered heterocycle, andX is oxygen, sulfur or the sulfinyl or sulfonyl group.
摘要:
The invention relates to novel 1,3,4-thiadiazolyloxyphenylureas which possess herbicidal properties and which have good selectivity in different crops of cultivated plants. The novel phenylureas have the general formula I ##STR1## wherein X is hydrogen, halogen or trifluoromethyl,Y is hydrogen, C.sub.1 -C.sub.6 alkyl which can be interrupted by oxygen or substituted by halogen or cyano; C.sub.3 -C.sub.6 cycloalkyl, cyclopropylmethyl, phenyl which is unsubstituted or substituted by chlorine or C.sub.1 -C.sub.4 alkyl; or is C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylsulfinyl or C.sub.1 -C.sub.4 alkylsulfonyl, or a sulfamoyl group --SO.sub.2 NR.sub.2 R.sub.3,R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl,R.sub.2 is hydrogen, C.sub.1 -C.sub.6 alkyl which can be interrupted by oxygen or substituted by halogen or cyano, or is C.sub.3 -C.sub.6 alkenyl or C.sub.3 -C.sub.6 alkynyl, or C.sub.3 -C.sub.6 cycloalkyl, has the same meaning as R.sub.2 or is C.sub.1 -C.sub.6 alkoxy, orR.sub.2 and R.sub.3, together with the nitrogen atom to which they are attached, can also form a 5- or 6-membered heterocyclic ring system which can contain an additional oxygen or sulfur atom or an imino group which is unsubstituted or substituted by C.sub.1 -C.sub.3 alkyl.
摘要:
The present invention relates to novel herbicidally active phenoxyphenoxyalkanecarboxylic acid esters, compositions which contain these compounds as active ingredient, and a method of selectively controlling weeds in crops of cultivated plants or of regulating plant growth which comprises the use of these compounds.The phenoxyphenoxyalkanecarboxylic acid esters have the formula ##STR1## wherein R.sub.1 is hydrogen, halogen or cyano,R.sub.2 is hydrogen or lower alkyl,R.sub.3 is a radical OR.sub.4 or SR.sub.5,R.sub.4 is a substituted alkyl radical, an alkenyl, alkynyl, cycloalkyl radical, a substituted or unsubstituted phenyl or benzyl radical or a 5- to 6-membered heterocyclic radical, andR.sub.5 is an unsubstituted alkyl radical or has the same meaning as R.sub.4.
摘要:
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.
摘要:
A composition and method for inhibiting the growth of plants, mono- and dicotyledonous plants such as soya, tobacco cereal grass, ornamental plants are disclosed. The active priciple is benzoic acids and esters corresponding to formula ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.12 alkyl unsubstituted or substituted by halogen, nitro, cyano, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylcarbonyl, C.sub.1 -C.sub.4 alkylamino, di-C.sub.1 -C.sub.4 -alkylamino, C.sub.3 -C.sub.6 cycloalkyl, furyl, tetrahydrofuryl, phenyl that may be substituted by halogen or methyl; C.sub.2 -C.sub.20 alkenyl; C.sub.2 -C.sub.20 halogenoalkenyl; C.sub.2 -C.sub.4 alkinyl; C.sub.3 -C.sub.20 cycloalkyl; phenyl, unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl; C.sub.1 -C.sub.4 alkoxy; C.sub.1 -C.sub.4 alkylthio; C.sub.1 -C.sub.2 halogenoalkyl, cyano or nitro;X is oxygen or sulfur.Some of the esters are disclosed here for the first time.