RO96793B1 - Process for preparing pyrazol derivatives - Google Patents

Process for preparing pyrazol derivatives

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Publication number
RO96793B1
RO96793B1 RO127976A RO12797687A RO96793B1 RO 96793 B1 RO96793 B1 RO 96793B1 RO 127976 A RO127976 A RO 127976A RO 12797687 A RO12797687 A RO 12797687A RO 96793 B1 RO96793 B1 RO 96793B1
Authority
RO
Romania
Prior art keywords
alkyl
haloalkyl
phenyl
general formula
pyridine
Prior art date
Application number
RO127976A
Other languages
Romanian (ro)
Inventor
Shimotori Hitoshi
Ishii Yamazaki Tutomu
Kuwatsuka Toshiaki
Yanase Yoji
Tanaka Yoshinori
Original Assignee
Mitsui Toatsu Chemicals
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals filed Critical Mitsui Toatsu Chemicals
Priority to RO127976A priority Critical patent/RO96793B1/en
Publication of RO96793B1 publication Critical patent/RO96793B1/en

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Abstract

Inventia se refera la un procedeu pentru prepararea unui derivat al pirazolului cu formula generala I: (vezi formula în descriere) în care R1 reprezinta o grupare alchil, halogenalchil, alchenil, halogenalchil, în care alchilul cu 1...4 atomi de carbon sau fenil R2 si R3 reprezinta fiecare un atom de hidrogen sauhalogen, sau o grupare alchil, halogenalchil, alcoxi, alcoxialchil, în care alchilul are 1...4 atomi de carbon sau fenil, iar R4 reprezinta o grupare alchenil, alchil, halogenalchil sau fenil, sau o grupare aromatica heterociclica care contine cel putin un atom de oxigen azot si sulf si poate fi eventual substituita sau nesubstituita. Procedeul consta în aceea ca se trateaza un compus cu formula generala: (vezi formula în descriere) în care R1, R2 si R3 sunt asa cum au fost definiti mai sus, iar X reprezinta un atom de halogen cu un aminoacetonitril reprezentat prin formula generala III (vezi formula în descriere) în care R4 este asa cum a fost definit mai sus, sau sarea acestuia într-un solvent inert ales dintre dietileter, diizopzopileter, tetrahidrofuran si dioxan, benzen, toluen, xilen si ligroina diclormetan, cloroform, tetraclorura de carbon, acetatuk de etil, propionatul de til, N, N-dimetil-formamida, dimetilsulfoxidul, 1,3-dimetilmidazolidinona, piridina, în prezenta unei baze alese dintre trietilamina, dimetianilina si piridina, amoniac, carbonat de potasiu, carbonat de sodiu, bicarbonat de sodiu, hidroxid de sodiu si cabronat de amoniu, la temperaturi între 0 degree C si temperatura camerei.The invention relates to a process for the preparation of a pyrazole derivative of the general formula I: (wherein R 1 represents an alkyl, haloalkyl, alkenyl, haloalkyl, wherein the alkyl of 1-4 carbon atoms or phenyl R2 and R3 each represent a hydrogen or halo atom or an alkyl, haloalkyl, alkoxy, alkoxyalkyl group in which the alkyl has 1-4 carbon atoms or phenyl and R4 represents an alkenyl, alkyl, haloalkyl or phenyl , or a heterocyclic aromatic group containing at least one nitrogen and sulfur oxygen atom and may optionally be substituted or unsubstituted. The process consists in treating a compound of the general formula: wherein R1, R2 and R3 are as defined above and X represents a halogen atom with an aminoacetonitrile represented by the general formula III (see formula in the description) wherein R4 is as defined above, or its salt in an inert solvent selected from diethyl ether, diisopzopylether, tetrahydrofuran and dioxane, benzene, toluene, xylene and ligroin dichloromethane, chloroform, carbon tetrachloride , ethyl acetate, N, N -dimethylformamide, dimethylsulfoxide, 1,3-dimethylimidazolidinone, pyridine, in the presence of a base selected from triethylamine, dimethylaniline and pyridine, ammonia, potassium carbonate, sodium carbonate, sodium hydroxide, sodium hydroxide and ammonium cabonate at temperatures between 0 ° C and room temperature.

RO127976A 1987-04-24 1987-04-24 Process for preparing pyrazol derivatives RO96793B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO127976A RO96793B1 (en) 1987-04-24 1987-04-24 Process for preparing pyrazol derivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO127976A RO96793B1 (en) 1987-04-24 1987-04-24 Process for preparing pyrazol derivatives

Publications (1)

Publication Number Publication Date
RO96793B1 true RO96793B1 (en) 1989-04-29

Family

ID=40905318

Family Applications (1)

Application Number Title Priority Date Filing Date
RO127976A RO96793B1 (en) 1987-04-24 1987-04-24 Process for preparing pyrazol derivatives

Country Status (1)

Country Link
RO (1) RO96793B1 (en)

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