Abstract: The invention relates to new 2-cyanobenzimidazole derivatives.These compounds have the formula (II): ##STR1## with: n 0, 1 or 2,m 1 or 2,R halogen; lower alkyl or lower alkoxy or lower alkylthio, optionally halogenated; NO.sub.2 --, CN--,R' lower alkyl or lower cycloalkyl, optionally halogenated, amino optionally substituted with one or two alkyl radicals, or a nitrogen atom substituted with two radicals forming with this nitrogen atom a heterocycle which contains from 4 to 6 members and from 1 to 3 hetero atoms in the ring,R" optionally substituted phenoxy or optionally substituted phenylthio.They can be used in agriculture, especially for controlling phytopathogenic fungi.

Abstract: The invention relates to new 2-cyanoimidazopyridine derivatives.These compounds have the formula (I): ##STR1## in which: R.sub.1 represents an optionally halogenated lower alkyl or cycloalkyl radical or an amino radical optionally substituted by one or two lower alkyl radicals, one of the groups Z.sub.1, Z.sub.2, Z.sub.3 and Z.sub.4 represents a nitrogen atom and the others are chosen independently from the CH group and CR groups in which R represents a halogen atom or an optionally substituted lower alkyl, optionally substituted lower alkoxy, optionally substituted lower alkylthio, nitro or cyano radical.They can be used in agriculture for combating phytopathogenic fungi.

Abstract: The invention relates to new 2-cyanobenzimidazole derivatives.These compounds correspond to the formula (I): ##STR1## in which: n is 0, 1, 2 or 3,R is halogen; optionally halogen-substituted lower alkyl or alkylthio; lower alkoxy optionally substituted by one or more halogens or by the phenyl radical; lower alkenyl; lower alkynyl; amino optionally substituted by one or two alkyls; NO.sub.2 --; CN--; CNO--; NCS--; , SCN--; lower alkylsulphonyl; sulphamoyl optionally substituted by one or two alkyls; lower alkylsulphinyl; optionally substituted acyl; or alkoxycarbonyl, andR' is optionally halogen-substituted lower alkyl, amino optionally substituted by one or two alkyl radicals, or a nitrogen atom substituted by two radicals forming a heterorcyclic ring with this nitrogen atom, the heterocyclic ring containing from 4 to 6 ring members and from 1 to 3 hetero-atoms in the ring.They can be used in agriculture, in particular for combating phytopathogenic fungi and for combating mites.

Abstract: They correspond to the formula: ##STR1## in which: X is an oxygen or sulphur atom, Y is a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4), Z is a halogen atom or an alkyl (C.sub.1 -C.sub.6), cycloalkyl (C.sub.5 -C.sub.7), alkoxy (C.sub.1 -C.sub.4) or phenyl radical, n is a number equal to 0, 1, 2 or 3, R.sub.1 is a hydrogen atom or an alkyl radical (C.sub.1 -C.sub.4) and R.sub.2 and R.sub.3, which are identical or different, each represent a hydrogen atom or an alkyl (C.sub.1 -C.sub.6), alkenyl (C.sub.2 -C.sub.4) or alkynyl (C.sub.2 -C.sub.4) radical, or together form a heterocyclic ring possessing from 5 to 6 ring members and optionally containing, in addition to the nitrogen atom, an oxygen or sulphur atom as a hetero-atom.These compounds can be used for selectively destroying weeds in crops such as maize, soya, cotton, sunflower, rice and horse bean.

Abstract: Oxadiazoline derivatives of the formula: ##STR1## WHEREIN R is alkyl of 1 through 4 carbon atoms, which are useful as intermediates in the synthesis of oxadiazoline derivatives of the formula: ##STR2## WHEREIN R is as defined above the R.sub.1 is alkyl of 1 through 4 carbon atoms, possessing useful herbicidal properties, are prepared by a new process which comprises reducing the nitro group in a 5-alkyl-3-(2-nitro-4-chlorophenyl)-1,3,4-oxadiazolin-2-one of the formula: ##STR3## wherein R is as defined above to a hydroxylamino group, treating the resulting 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one with concentrated sulphuric acid of density about 1.83 to produce the corresponding amino-phenol, and converting the amine group in the resulting 5-alkyl-3-(2-amino-4-chloro-5-hydroxyphenyl)-1,3,4-oxadiazolin-2 -one to a chlorine atom. The 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one intermediates are new compounds.

Abstract: Compounds of the formula: ##EQU1## wherein R and R.sup.1 represent alkyl of 1 through 4 carbon atoms, X.sup.1 and Y.sup.1 represent oxygen or sulphur, and X.sup.2 and Y.sup.2 represent oxygen or sulphur, at least one of X.sup.2 and Y.sup.2 representing sulphur, possess fungicidal and anthelmintic properties.

Abstract: Oxadiazoline derivatives of the formula: ##SPC1##Wherein R is alkyl of 1 through 4 carbon atoms, which are useful as intermediates in the synthesis of oxadiazoline derivatives of the formula: ##SPC2##Wherein R is as defined above and R.sub.1 is alkyl of 1 through 4 carbon atoms, possessing useful herbicidal properties, are prepared by a process which comprises reducing the nitro group in a 5-alkyl-3-(2-nitro-4-chlorophenyl)-1,3,4-oxadiazolin of the formula: ##SPC3##Wherein R is as defined above to a hydroxylamino group, subjecting the resulting 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one to the Bamberger rearrangement, and converting the amine group in the resulting 5-alkyl-3-(2-amino-4-chloro-5-hydroxyphenyl)-1,3,4-oxadiazolin-2-one to a chlorine atom. The 5-alkyl-3-(2-hydroxylamino-4-chlorophenyl)-1,3,4-oxadiazolin-2-one intermediates are compounds.