摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
3,5-Dichloroaniline is advantageously produced by reacting 1-bromo-2,4-dichlorobenzene with a metal amide in liquid ammonia at a molar ratio of 1-bromo-2,4-dichlorobenzene to the metal amide of 1 : 2 to 7.The 3,5-dichloroaniline is useful as an intermediate for various agricultural chemicals, dyes and medicines.
摘要:
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.
摘要:
5,6-Dichloro-.beta.-trifluoromethylpyridine or 2,5,6-trichloro-.beta.-trifluoromethylpyridine is produced by reacting 6-chloro-.beta.-trifluoromethylpyridine or 2,6-dichloro-.beta.-trifluoromethylpyridine with chlorine gas to chlorinate the 5-position of pyridine nucleus thereof:(1) at a temperature of 100.degree. C. to 250.degree. C. and at least sufficient amount of chlorine for the reaction;(2) in the presence of the catalyst of amount of at least 40% by weight (based on the 6-chloro or/and 2,6-dichloro-.beta.-trifluoromethylpyridine), the catalyst being chlorides a metallic element selected from the group consisting of iron, tungsten, molybdenum, titanium, and antimony.
摘要:
A phenoxybutyltriazole compound represented by the following formula (I): ##STR1## wherein X is a halogen atom, a phenyl group or a 5-trifluoromethylpyridine-2-yloxy group; Y is a halogen atom or a trifluoromethyl group; Q is a >C.dbd.O group or a >CH--OH group; A is a >CH-- group or a nitrogen atom; and m and n are each an integer of 0 to 2, or a salt thereof, which is useful as an active ingredient for agricultural and horticultural fungicides, is disclosed. A process for producing the compound of the formula (I) is also disclosed.
摘要:
A novel compound, 2-amino-trifluoromethyl-halogenopyridine, is provided, which is prepared by amination of a 2-halogeno-trifluoromethyl-halogenopyridine or by halogenation of 2-amino-trifluoromethylpyridine. This compound is useful as an intermediate for synthesis of agricultural chemicals and medicines.