Abstract: A trifluoromethylpyridine selected from the group consisting of .alpha.-trifluoromethylpyridine, .gamma.-trifluoromethylpyridine, a bis(trifluoromethyl)pyridine and chlorides thereof which have 1 to 3 chlorine atoms in its pyridine nucleus is produced by reacting a pyridine derivative selected from the group consisting of .alpha.-picoline, .gamma.-picoline and a lutidine with chlorine and anhydrous hydrogen fluoride at a temperature of 300.degree. to 600.degree. C. in a vapor phase in the presence of a diluent and a catalyst comprising a fluoride of a metallic element selected from the group consisting of aluminum, chromium, iron, nickel, manganese, cobalt and copper.

Abstract: A trifluoromethyl-2-(thio)pyridone compound having the formula: ##STR1## wherein X represents a hydrogen atom or a halogen atom, Y.sub.1 and Y.sub.2 each represents a hydrogen atom, a halogen atom or a trifluoromethyl group, and Z represents an oxygen atom or a sulfur atom, in which either Y.sub.1 or Y.sub.2 represents a trifluoromethyl group, and when X and Y.sub.2, or X and Y.sub.1 represent a hydrogen atom at the same time, then Z represents a sulfur atom,and a process for preparing the same.

Abstract: A process for producing a 3-chloro-5-trifluoromethylpyridine derivative comprises reacting a 5-trifluoromethylpyridine derivative having a hydrogen atom at 3-position with chlorine. The process is characterized by reacting said 5-trifluoromethylpyridine derivative with chlorine in a vapor phase in the presence of a catalyst selected from the group consisting of activated carbon and a chloride of a metal element selected from the group consisting of iron, antimony, copper and zinc.

Abstract: A pyridine derivative having the formula ##STR1## wherein X.sup.2 and Y.sup.2 represents hydrogen atom or chlorine atom is produced by reacting a pyridine compound having the formula ##STR2## wherein X.sup.1 and Y.sup.1 represent hydrogen atom or chlorine atom, with chlorine and anhydrous hydrogen fluoride by a vapor phase reaction in the presence of a catalyst at a temperature of 250.degree. to 600.degree. C. using as the catalyst a fluoride of a metal selected from the group consisting of copper, vanadium, tin, bismuth, zirconium, magnesium, barium, zinc, calcium, potassium and sodium.

Abstract: A process for producing 2,6-difluorobenzonitrile comprises reducing a chloro fluorobenzonitrile selected from 3-chloro-2,6-difluorobenzonitrile, 3,5-dichloro-2,6-difluorobenzonitrile or a mixture thereof by hydrogen gas in the presence of a palladium or platinum catalyst at a temperature of 0.degree. to 200.degree. C.

Abstract: An aminobenzene is produced by reacting a chlorobenzene with ammonia in the presence of a copper type catalyst, namely by reacting ammonia with 3,5-diaminochlorobenzene to produce 1,3,5-triaminobenzene at a temperature of 150.degree. to 250.degree. C. at a molar ratio of ammonia of 2 to 10 to 3,5-diaminochlorobenzene in the presence of a copper compound catalyst.

Abstract: 1,3,5,-Trichlorobenzene is produced by chlorinating 1,3,5-trihalobenzene having 1 to 3 bromine atom and 2 to 0 chlorine atom. The gaseous 1,3,5-halobenzene having 1 to 3 bromine atom and 2 to 0 chlorine atom is brought into contact with chlorine gas at a molar ratio of 0.5 to 3.0 of the stoichiometric amount of chlorine required for said conversion, in a vapor phase at a temperature of 280.degree. to 500.degree. C.

Abstract: A 2-substituted-5-trifluoromethylpyridine compound represented by Formula (I): ##STR1## wherein X is a hydrogen atom or a halogen atom, and Y is a cyano group or a carboxy group, provided that Y is a cyano group, then X is a halogen atom, or a salt thereof, and a process for the production of the same. This compound is useful as an intermediate for the production of various fine chemicals.

Abstract: 1-Bromo-3,5-dichlorobenzene is produced in high efficiency by a special isomerization of monobromodichlorobenzene in the presence of an aluminum halide and separating the object product and recycling a residue.1-Bromo-3,5-dichlorobenzene is useful intermediates for various agricultural chemicals, dyes and medicines.

Abstract: .alpha.-[4-(4-Trifluoromethylphenoxy)phenoxy]alkanecarboxylic acids (the "4-trifluoromethylphenoxy group" of which may contain one chlorine atom as a substituent) and derivatives thereof useful as a herbicide, a herbicidal composition containing the compound, methods of controlling weeds and production thereof.

Abstract: A novel compound for combatting insect, mite, fungus or bacterium is a pyridylaniline represented by the following formula (I) ##STR1## wherein X is a trifluoromethyl group, a halogen atom, a lower alkyl group or a lower alkoxy group; n is an integer of 0 to 4; R is a hydrogen atom or an acetyl group; Y is a hydrogen atom, a halogen atom a lower alkoxy group, a lower alkylthio group, a hydroxy group, an azido group or a phenoxy group of which the phenyl ring may be substituted by a hydroxy group; Z.sub.1, Z.sub.2 and Z.sub.3 are a trifluoromethyl group or a nitro group, provided that at least one of X is a trifluoromethyl group or a lower alkyl group when n is an integer of 3 or 4.

Abstract: .alpha.-[4-(4-Trifluoromethylphenoxy)phenoxy]alkanecarboxylic acids (the "4-trifluoromethylphenoxy group" of which may contain one chlorine atom as a substituent) and derivatives thereof useful as a herbicide, a herbicidal composition containing the compound, methods of controlling weeds and production thereof.

Abstract: .alpha.[4-(4-Trifluoromethylphenoxy)phenoxy]alkanecarboxylic acids (the "4-trifluoromethylphenoxy group" of which may contain one chlorine atom as a substituent) and derivatives thereof useful as a herbicide, a herbicidal composition containing the compound, methods of controlling weeds and production thereof.

Abstract: Pyridine derivatives having a trifluoromethyl group at .beta.-position thereof are produced by reacting .beta.-picoline with chlorine and hydrogen fluoride in a vapor phase at high temperature for a short time. The reaction condition can be mild and the yield of the object compound is increased by reacting them in the presence of a specific metal fluodie. The pyridine derivatives useful as starting materials for agricultural chemicals and medicines can be continuously obtained by a simple reaction at high yield.

Abstract: .alpha.-[4-(4-Trifluoromethylphenoxy)phenoxy]alkanecarboxylic acids (the "4-trifluoromethylphenoxy group" of which may contain one chlorine atom as a substituent) and derivatives thereof useful as a herbicide, a herbicidal composition containing the compound, methods of controlling weeds and production thereof.

Abstract: 4-(Pyridyl-2-oxy)phenoxyalkanecarboxylic acid derivative is produced by reacting 2-phenoxypyridine derivative with 4-hydroxyphenoxyalkanecarboxylic acid derivative. The products which are effective as an active ingredient of a herbicide can be obtained at high yield by an interphenoxylation.

Abstract: A chloro .beta.-trifluoromethylpyridine is produced by reacting a chloro .beta.-trichloromethylpyridine with hydrogen fluoride in the presence of a specific metal fluoride in a vapor phase at high temperature for a short time. The chloro .beta.-trifluoromethylpyridines which are useful as intermediates for agricultural chemicals and medicines can be obtained at high yield.

Abstract: 2-Chloro-5-trichloromethyl pyridine is produced by reacting .beta.-picoline with chlorine in a gaseous phase at 300.degree. to 500.degree. C. in the presence of an inert diluent of nitrogen, a halogenated methane, a halogenated ethane a halogenated ethylene or a mixture thereof. 2-Chloro-5-trichloromethyl pyridine is useful as an intermediate for medicines, agricultural chemicals, dyes especially herbicides.

Abstract: 2-Substituted phenoxy-3-chloro-5-trifluoromethyl pyridine having the formula (I): ##STR1## wherein X is a hydrogen atom; a (C.sub.1 -C.sub.4)alkyl group; a (C.sub.1 -C.sub.4)alkoxy group; a --COOR.sub.1 group wherein R.sub.1 is a hydrogen atom, a cation or a (C.sub.1 -C.sub.4)alkyl group; or an ##STR2## group wherein R.sub.2 is a hydrogen atom, a cation, a (C.sub.1 -C.sub.4)alkyl group or a benzyl group; and Y is a halogen atom, a nitro group or a cyano group, useful as a herbicide.

Abstract: Phenoxypropane compounds represented by the general formula (I): ##STR1## wherein X is a 4-halophenoxy group, a 2,4-dihalophenoxy group, a 4-trifluoromethylphenoxy group, a 2-halo-4-trifluoromethylphenoxy group, a 5-halopyridyl-2-oxy group or a 3,5-dihalopyridyl-2-oxy group; and Y is a halogen atom, a hydroxy group, a (C.sub.1 -C.sub.4)-alkoxy group in which the alkyl moiety thereof may be substituted with a hydroxy group(s), a (C.sub.1 -C.sub.4)alkylcarbonyloxy group or a phenylcarbonyloxy group in which the phenyl moiety thereof may be substituted with a halogen atoms(s), useful as a herbicide; a herbicidal composition containing the compound; and methods of controlling weeds using such materials.