NO158397B

NO158397B - ELECTROMECHANICAL MACHINE.

Info

Publication number: NO158397B
Application number: NO80803504A
Authority: NO
Inventors: James H Hahn
Original assignee: Rush David H
Priority date: 1979-03-21
Filing date: 1980-11-20
Publication date: 1988-05-24
Also published as: NO803504L; NO158397C

Description

Fremgangsmåte til fremstilling av nye, terapeutisk aktive, 1,4-disubstituerte piperaziner og diazepiner. Process for the production of new, therapeutically active, 1,4-disubstituted piperazines and diazepines.

Foreliggende oppfinnelse angår en fremgangsmåte til fremstilling av en ny serie terapeutisk aktive 1,4-disubstituerte piperazin og The present invention relates to a method for the production of a new series of therapeutically active 1,4-disubstituted piperazine and

diazepin derivater og deres terapeutisk aksepterbare syreaddisjonsalter. De nye forbindelser diazepine derivatives and their therapeutically acceptable acid addition alters. The new connections

som fremstilles ifølge foreliggende oppfinnelse which is produced according to the present invention

kan representeres av følgende generelle formel can be represented by the following general formula

hvori Art og Ar2 hver er valgt fra den gruppe som består av fenyl, lavere alkylfenyl slik som f. eks. metylfenyl, halogenfenyl, slik som f. eks. fluor-fenyl og trifluormetylfenyl, m er et helt tall 2 eller 3, Alk er valgt fra den gruppe som består av -CH(CH3)- og -(CH2)h- hvori n er et helt tall 1, 2 eller 3, X betyr karbonyl eller metyl, R betyr hydrogen eller metyl, Rj betyr hydrogen, lavere alkyl og lavere alkyl karbonyl, og Ar3 er valgt fra den gruppe som består av wherein Art and Ar2 are each selected from the group consisting of phenyl, lower alkylphenyl such as e.g. methylphenyl, halophenyl, such as e.g. fluorophenyl and trifluoromethylphenyl, m is an integer 2 or 3, Alk is selected from the group consisting of -CH(CH3)- and -(CH2)h- in which n is an integer 1, 2 or 3, X means carbonyl or methyl, R means hydrogen or methyl, Rj means hydrogen, lower alkyl and lower alkyl carbonyl, and Ar 3 is selected from the group consisting of

hvori R2 og R3 hver er valgt fra den gruppe som består av hydrogen, lavere alkyl, lavere alkoksy, halo og nitro, og R4 er lavere alkyl karbonyl. wherein R 2 and R 3 are each selected from the group consisting of hydrogen, lower alkyl, lower alkoxy, halo and nitro, and R 4 is lower alkyl carbonyl.

Som anvendt her har lavere alkyl og lavere alkoksy fra 1 til 5 karbonatomer, inklusive ufor-grenet eller forgrenede mettede alifatiske kjeder slik som f. eks. metyl, etyl, propyl, isopropyl, butyl, isobutyl, tertierbutyl, pentyl og liknende, og respektive metoksy, etoksy, propoksy, isoprop-oksy, etc. og halo betyr klor, brom, fluor og jod, fortrinsvis fluor og klor. As used herein, lower alkyl and lower alkoxy have from 1 to 5 carbon atoms, including unbranched or branched saturated aliphatic chains such as e.g. methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tertiary butyl, pentyl and the like, and respective methoxy, ethoxy, propoxy, isopropoxy, etc. and halo means chlorine, bromine, fluorine and iodine, preferably fluorine and chlorine.

Forbindelsene som fremstilles ifølge foreliggende oppfinnelse kan omdannes til deres terapeutiske aksepterbare syreaddisjonssalter ved omsetning med en tilsvarende syre slik som f. eks. en uorganisk syre slik som hydrohalogensyre dvs. hydroklorsyre, hydrobrom eller hydrojodsyre, svovelsyre, salpetersyre eller tiocyansyre, en fosfosyre, en organisk syre slik som eddiksyre, propionsyre, glykolsyre, melkesyre, pyrodruesyre, oksalsyre, malonsyre, ravsyre, maleinsyre, fu-marsyre, melkesyre, vinsyre, sitronsyre, benzo-syre, kanelsyre, mandelsyre, metansulfonsyre, etansulfonsyre, hydroksyetansulfonsyre, para-toluensulfonsyre, salisylsyre, para-aminosalisyl-syre, 2-fenoksybenzoesyre eller 2-acetoksyben-zoesyre. The compounds produced according to the present invention can be converted into their therapeutically acceptable acid addition salts by reaction with a corresponding acid such as e.g. an inorganic acid such as hydrohalic acid i.e. hydrochloric acid, hydrobromic or hydroiodic acid, sulfuric acid, nitric acid or thiocyanic acid, a phosphonic acid, an organic acid such as acetic acid, propionic acid, glycolic acid, lactic acid, pyruvic acid, oxalic acid, malonic acid, succinic acid, maleic acid, fumaric acid, lactic acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, hydroxyethanesulfonic acid, para-toluenesulfonic acid, salicylic acid, para-aminosalicylic acid, 2-phenoxybenzoic acid or 2-acetoxybenzoic acid.

Forbindelsene som fåes ifølge foreliggende oppfinnelse kan fremstilles ved å omsette en forbindelse med den generelle formel The compounds obtained according to the present invention can be prepared by reacting a compound with the general formula

med en forbindelse med den generelle formel with a compound of the general formula

Forbindelsene med formel 2 og formel 5 kan også med fordel fremstilles ved å omsette en forbindelse med formel 6 som har et egnet blokke-ringsmiddel slik som en benzylgruppe ved et av ring nitrogenene med respektive en forbindelse med formel 4 eller 3 ifølge ovenstående reak-sjonsskjemaer og deretter debenzyleres den dannede forbindelse. En slik debenzylering utføres hensiktsmessig ved hjelp av hydrogen som er aktivert av en egnet katalysator f. eks. palladium på trekull, i et alkoholisk oppløsningsmiddel slik som etanol. En slik bruk foretrekkes også når m i reaksjonsdeltageren 6 er lik 3, det vil si ved fremstilling av de nye diazepinderivater som fåes ifølge foreliggende oppfinnelse. The compounds of formula 2 and formula 5 can also be advantageously prepared by reacting a compound of formula 6 which has a suitable blocking agent such as a benzyl group at one of the ring nitrogens with respectively a compound of formula 4 or 3 according to the above reaction schemes and then the compound formed is debenzylated. Such debenzylation is conveniently carried out using hydrogen which has been activated by a suitable catalyst, e.g. palladium on charcoal, in an alcoholic solvent such as ethanol. Such use is also preferred when m in the reaction participant 6 is equal to 3, that is to say in the production of the new diazepine derivatives obtained according to the present invention.

Forbindelsene som fåes ved hjelp av frem-gangsmåten ifølge foreliggende oppfinnelse har The compounds obtained by means of the method according to the present invention have

anti-angiotensin og antihistamin virkning hvil- anti-angiotensin and antihistamine effect rest-

hvori Ar,, Ar2, Ar3, m, X, Alk, R og R, har den betydning som "er angitt i det foregående, og Y betyr en reaktiv ester av den tilsvarende alkohol med sterke, uorganiske eller organiske syrer slik som hydroklorsyre, hydrobromsyre, hydrojodsyre, svovelsyre, metansulfonsyre, og toluensulfon-syre. Som et alternativ kan en forbindelse med den generelle formel wherein Ar 1 , Ar 2 , Ar 3 , m , X , Alk , R and R , have the meanings given above, and Y means a reactive ester of the corresponding alcohol with strong inorganic or organic acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, methanesulfonic acid, and toluenesulfonic acid Alternatively, a compound of the general formula

ArrCH-CH2-CH9-CH2-Y ArrCH-CH2-CH9-CH2-Y

I (4) Ar2In (4) Ar2

omsettes med en forbindelse med den generelle formel is reacted with a compound of the general formula

Disse reaksjoner utføres hensiktsmessig ved oppvarming av reaksjonsdeltagerne i nærvær av et egnet inert organisk oppløsningsmiddel slik som beskrevet i det følgende under tilbakeløps-kj ølingsbetingelser. These reactions are suitably carried out by heating the reaction participants in the presence of a suitable inert organic solvent as described below under reflux cooling conditions.

Forbindelsene med formel 2 og formel 5 kan fåes ved å omsette et vannfritt piperazin eller pehydro-l,4-diazepin med den generelle formel 6 med respektive en forbindelse med formel 4 og formel 3: The compounds of formula 2 and formula 5 can be obtained by reacting an anhydrous piperazine or pehydro-1,4-diazepine of the general formula 6 with a compound of formula 4 and formula 3, respectively:

ket er bestemt på isolert marsvinileum. I tillegg har det vist seg å ha en eller flere av følgende egenskaper: 1. Coronar vasodilasjon av lang varighet hvilket kan iakttas ved oral, parenteral og intra-venøs administrasjon av midlet hos hunder, særlig når Ar, og/eller Ar2 i ovenstående formler betyr fluorfenyl eller fenyl, m er 2 eller 3, n er fortrinsvis 1, R er hydrogen eller metyl, Rt er hydrogen, X er karbonyl og Ar3 er 2,6-dilavere -alkyl-fenyl, 2,6-di-halofenyl, 2-alkyl-6-halofenyl, 2,5-di-laverealkoksyfenyl, og acylert fenyl, dvs. hvor R,, betyr acetyl, propionyl, butyryl etc. De fleste av disse forbindelser har vist seg også å ha lokal anestetisk egenskap særlig med slike forbindelser hvori R og R, er hydrogen, m lik 2, alk er -CH(CH3)-, X er karbonyl og Ar3 er fenyl eller substituert fenyl. 2. Stimulerende egenskaper for det sentrale nervesystem, antikarrageninaktivitet og lokal anestetisk aktivitet vist i en foretrukket subge-nerisk klasse hvori i ovenstående formler Ar, betyr fluorfenyl, alkylfenyl, fenyl eller trienyl, Ar2 er fluorfenyl eller fenyl, m er 2 eller 3, n fortrinsvis 1, R er hydrogen eller metyl, X er metylen, R, er hydrogen eller lavere alkyl og Ar3 er fenyl, eller substituert fenyl f. eks. halofenyl, alkylfenyl. ket is determined on isolated marsvinileum. In addition, it has been shown to have one or more of the following properties: 1. Coronary vasodilation of long duration which can be observed with oral, parenteral and intravenous administration of the agent in dogs, especially when Ar, and/or Ar2 in the above formulas means fluorophenyl or phenyl, m is 2 or 3, n is preferably 1, R is hydrogen or methyl, Rt is hydrogen, X is carbonyl and Ar3 is 2,6-dilower -alkyl-phenyl, 2,6-di-halophenyl, 2-alkyl-6-halophenyl, 2,5-di-lower oxyphenyl, and acylated phenyl, i.e. where R,, means acetyl, propionyl, butyryl etc. Most of these compounds have also been shown to have local anesthetic properties, particularly with such compounds in which R and R, are hydrogen, m equal to 2, alk is -CH(CH3)-, X is carbonyl and Ar3 is phenyl or substituted phenyl. 2. Stimulating properties for the central nervous system, anticarrageenan activity and local anesthetic activity shown in a preferred subgeneric class in which in the above formulas Ar, means fluorophenyl, alkylphenyl, phenyl or trienyl, Ar2 is fluorophenyl or phenyl, m is 2 or 3, n preferably 1, R is hydrogen or methyl, X is methylene, R is hydrogen or lower alkyl and Ar 3 is phenyl, or substituted phenyl e.g. halophenyl, alkylphenyl.

Som et alternativ kan fobindelser hvori X er metylen fåes ved å omsette en forbindelse med formel 2: Alternatively, compounds in which X is methylene can be obtained by reacting a compound of formula 2:

med en forbindelse med den generelle formel: with a compound of the general formula:

Y-Alk-CH2-Z Y-Alk-CH2-Z

(7) (7)

slik at man får en forbindelse med den generelle struktur: so that one gets a connection with the general structure:

hvori Ar,, Ar2, m, Alk, R og Y har den ovenfor-angitte betydning og Z betyr hydroksy eller Y. Hvis Z er hydroksy, overføres denne alkohol til en reaktiv ester Y med en sterk uorganisk eller organisk syre ved hjelp av vanlige fremgangs-måter hvoretter forbindelse 8 omsettes med en forbindelse med formelen: wherein Ar1, Ar2, m, Alk, R and Y have the above meaning and Z means hydroxy or Y. If Z is hydroxy, this alcohol is transferred to a reactive ester Y with a strong inorganic or organic acid by means of usual methods according to which compound 8 is reacted with a compound of the formula:

Hvori Rt er hydrogen eller lavere alkyl, og Ar3 er som angitt ovenfor. Wherein Rt is hydrogen or lower alkyl, and Ar3 is as defined above.

Acylering av forbindelsene med den generelle formel 1 hvori R, er hydrogen utføres ved oppvarming av en slik forbindelse med et acy-leringsmiddel slik som et anhydrid av en lavere fettsyre, eller et lavere alkyl karbonyl halogenid under tilbakeløpskj ølingsbetingelser i nærvær av et ikke vanlig inert organisk oppløsningsmiddel. Acylation of the compounds of the general formula 1 wherein R is hydrogen is carried out by heating such a compound with an acylating agent such as an anhydride of a lower fatty acid, or a lower alkyl carbonyl halide under reflux conditions in the presence of an unusual inert organic solvent.

Sluttelig kan forbindelser med den generelle formel 1 hvori X er karbonyl og/eller R, er lavere alkyl karbonyl omdannes til deres reduserte motparter dvs. hvor X er metylen og/eller R, er lavere alkyl, ved omsetning med et overskudd av et blandet metallhydrid slik som litiumalumi-niumhydrid og lignende i et egnet indert organisk oppløsningsmiddel slik som tetrahydrofuran, dioksan eller dietylester. Under slike betingelser reduseres karbonyl i R4 til det tilsvarende karbinol. Reduksjon av R4 karbonylgruppen til en metylengruppe kan utføres ved hjelp av amalgamert sink og hydroklorsyre (Clemmen-sens reduksjon) eller ved hjelp av alkalisk spalt-ning av hydrazoner, semicarbazoner eller aziner (Wolff-Kishner reduksjon). Finally, compounds of general formula 1 wherein X is carbonyl and/or R is lower alkyl carbonyl can be converted to their reduced counterparts, i.e. where X is methylene and/or R is lower alkyl, by reaction with an excess of a mixed metal hydride such as lithium aluminum hydride and the like in a suitable inert organic solvent such as tetrahydrofuran, dioxane or diethyl ester. Under such conditions, the carbonyl in R4 is reduced to the corresponding carbinol. Reduction of the R4 carbonyl group to a methylene group can be carried out by means of amalgamated zinc and hydrochloric acid (Clemmen's reduction) or by means of alkaline cleavage of hydrazones, semicarbazones or azines (Wolff-Kishner reduction).

Avhengig av de betingelser som anvendes under reaksjonen, fåes de nye forbindelser enten i form av de fri baser eller deres salter. Saltene omdannes til de fri baser på vanlig måte, f. eks. ved reaksjon med alkali slik som natrium eller kalium hydroksyd. Basene kan omdannes til deres terapeutisk nyttige syreaddisj onssalter ved omsetning med en tilsvarende organisk eller uorganisk syre. Depending on the conditions used during the reaction, the new compounds are obtained either in the form of the free bases or their salts. The salts are converted into the free bases in the usual way, e.g. by reaction with alkali such as sodium or potassium hydroxide. The bases can be converted into their therapeutically useful acid addition salts by reaction with a corresponding organic or inorganic acid.

Organiske opløsningsmidler som med fordel kan anvendes ved utførelse av de nødvendige omsetninger ifølge foreliggende oppfinnelse om-fatter ketoner slik som aceton eller 4-metyl-2-pentanon, aromatiske og alifatiske hydrokarbo-ner, slik som benzen, toluen, xylen eller heptan, etere slik som tetrahydrofuran, dioksan eller di-etyleter. Oppløsningsmidler slik som lavere al-kanoler kan anvendes f. eks. etanol, 2-propanol eller butanol. Organic solvents that can be advantageously used when carrying out the necessary reactions according to the present invention include ketones such as acetone or 4-methyl-2-pentanone, aromatic and aliphatic hydrocarbons such as benzene, toluene, xylene or heptane, ethers such as tetrahydrofuran, dioxane or diethyl ether. Solvents such as lower alkanols can be used, e.g. ethanol, 2-propanol or butanol.

Følgende eksempler illustrerer fremgangs-måter til fremstilling av forbindelser som kan anvendes som utgangsforbindelser i foreliggende oppfinnelse: The following examples illustrate methods for producing compounds that can be used as starting compounds in the present invention:

Eksempel 1. Example 1.

En varm blanding av 121 deler 2,6-dimetyl-anilin i 600 deler etanol (40°C) tilsettes dråpevis en oppløsning av 55 deler etylenoksyd i 400 deler etanol under omrøring. Etter at tilsetningen er fullstendig, omrøres det hele natten over ved romtemperatur. Blandingen omrøres og kokes med tilbakeløpskj øler i 5 timer og blir deretter fordampet. Den oljeaktige rest destilleres i vakuum og gir N-(2-hydroksy-etyl)-2,6-dimetyl-anilin, med kokepunkt 100—125°C ved 0,15 mm trykk. A hot mixture of 121 parts of 2,6-dimethylaniline in 600 parts of ethanol (40°C) is added dropwise to a solution of 55 parts of ethylene oxide in 400 parts of ethanol with stirring. After the addition is complete, it is stirred overnight at room temperature. The mixture is stirred and refluxed for 5 hours and then evaporated. The oily residue is distilled in vacuum and gives N-(2-hydroxyethyl)-2,6-dimethylaniline, boiling point 100-125°C at 0.15 mm pressure.

Eksempel 2. Example 2.

En blanding av 43 deler N-(2-hydroksy-etyl)-2,6-dimetyl-anilin og 225 deler hydrobrom-syreoppløsning 48 pst.ig kokes under omrøring ved ca. 140°C i et oljebad i en kolbe forsynt med en tilbakeløpskj øler som kan anvendes for de-stillasjon. Etter 3 timer tilsettes en annen por-sjon på 150 deler hydrobromsyreoppløsning som er 48 pst.'ig og temperaturen reguleres således at etter 15 timer er alt vann avdestillert (temperatur: 130°C). Deretter tilsettes en tredje por-sjon på 150 deler 48 pst.'ig hydrobromsyreoppløs-ning, og temperaturen i oljebadet reguleres således at etter 3 timer er alt vann avdestillert (temperatur: ca. 160°C). Den faste rest kokes i 160 deler etanol, frafiltreres igjen mens det er varmt, vaskes med 2-propanol og tørkes, og gir N- (2-brom-etyl) -2,6-dimetyl-anilin-hydrobromid, med smeltepunkt 230—237°C. A mixture of 43 parts of N-(2-hydroxyethyl)-2,6-dimethylaniline and 225 parts of hydrobromic acid solution 48% is boiled with stirring at approx. 140°C in an oil bath in a flask fitted with a reflux condenser which can be used for distillation. After 3 hours, another portion of 150 parts hydrobromic acid solution is added which is 48% and the temperature is regulated so that after 15 hours all water has been distilled off (temperature: 130°C). A third portion of 150 parts of 48% hydrobromic acid solution is then added, and the temperature in the oil bath is regulated so that after 3 hours all water has distilled off (temperature: approx. 160°C). The solid residue is boiled in 160 parts of ethanol, filtered off again while hot, washed with 2-propanol and dried, yielding N-(2-bromoethyl)-2,6-dimethylaniline hydrobromide, melting point 230— 237°C.

Eksempel 3. Example 3.

En blanding av 94 deler 4-klor-l,l-di-(4-metyl-fenyl)-l-buten og 240 deler 2-propanol hydreres ved normalt trykk og ved en temperatur på ca. 35°C i nærvær av 15 deler palladium på trekullkatalysator som er 10 pst.'ig. Etter at den beregnede mengde hydrogen er opptatt, stoppes hydreringen. Katalysatoren f raf Utreres og etter avkjøling av filtratet til -^10°C frafiltreres det utfelte faste stoff og tørkes og gir 1-klor-4,4-di-(4-metyl-fenyl)-butan med smeltepunkt 44—46° C. A mixture of 94 parts of 4-chloro-1,1-di-(4-methyl-phenyl)-1-butene and 240 parts of 2-propanol is hydrogenated at normal pressure and at a temperature of approx. 35°C in the presence of 15 parts of palladium on charcoal catalyst which is 10 percent. After the calculated amount of hydrogen has been taken up, the hydrogenation is stopped. The catalyst from raf is evaporated and after cooling the filtrate to -^10°C the precipitated solid is filtered off and dried to give 1-chloro-4,4-di-(4-methyl-phenyl)-butane with a melting point of 44-46°C .

Eksempel 4. Example 4.

En avkjølet oppløsning (ca. 10°C) av 49,5 deler l-[4,4-di-(4-fluorfenyl)-butyi;]-piperazin i 240 deler metanol tilsettes en oppløsning av 20 deler etylenoksyd i 40 deler metanol. Etter at tilsetningen er fullstendig, oppvarmes det hele til 40°C og mens denne temperatur bibeholdes, inn-føres et overskudd av gassformet etylenoksyd i løpet av 30 minutter. Det hele fordampes. Resten må oppløses i en blanding av 2-propanol og diisopropyleter, og gassformet hydrogenklorid inn-føres. Det utfelte salt frafiltreres og tørkes og gir 1- [4,4-di- (4-fluorfenyl) -butyl]-4- (2-hydroksy-etyl)-plperazin dihydroklorid med smeltepunkt 175—186°C. A cooled solution (approx. 10°C) of 49.5 parts of 1-[4,4-di-(4-fluorophenyl)-butyl]-piperazine in 240 parts of methanol is added to a solution of 20 parts of ethylene oxide in 40 parts of methanol . After the addition is complete, the whole is heated to 40°C and, while maintaining this temperature, an excess of gaseous ethylene oxide is introduced over the course of 30 minutes. It all evaporates. The residue must be dissolved in a mixture of 2-propanol and diisopropyl ether, and gaseous hydrogen chloride introduced. The precipitated salt is filtered off and dried to give 1-[4,4-di-(4-fluorophenyl)-butyl]-4-(2-hydroxy-ethyl)-plperazine dihydrochloride with a melting point of 175-186°C.

En blanding av 80 deler tionylklorid og 75 deler kloroform tilsettes porsjonsvis 19,5 deler 1- [4,4-di- (4-fluor-fenyl) -butyl]-4- (2-hydroksy-etyl)-piperazin-dihydroklorid. Etter at tilsetningen er fullstendig, kokes det hele med tilbake-løpskj øler i 3 timer. Reaksjonsblandingen inn-dampes. Den faste rest omkrystalliseres fra kokende aceton, frafiltreres og tørkes og gir l-[4,4-di- (4-f luor-f enyl) -butyl] -4- (2-klor-etyl) - piperazin dihydroklorid med smeltepunkt 210— 212°C (dekomponering). A mixture of 80 parts of thionyl chloride and 75 parts of chloroform is added portionwise to 19.5 parts of 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-(2-hydroxy-ethyl)-piperazine dihydrochloride. After the addition is complete, it is all boiled with reflux for 3 hours. The reaction mixture is evaporated. The solid residue is recrystallized from boiling acetone, filtered off and dried to give 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-(2-chloro-ethyl)-piperazine dihydrochloride with melting point 210 — 212°C (decomposition).

Eksempel 5. Example 5.

En avkjølt (10°C isbad) blanding av 105 deler eddiksyre og 18 deler 2-propyanylanilin tilsettes dråpevis 17 deler klor-acetylklorid (eksoterm reaksjon). Etter at tilsetningen er fullstendig omrøres det hele i 15 minutter ved 10°C. Deretter tilsettes dråpevis 132 deler natriumacetat/ vann (på forhånd tilberedt fra 51 deler natriumacetat og 128 deler vann). Etter at tilsetningen ér fullstendig, filtreres bunnfallet fra, vaskes med. vann og tørkes og gir N-(2-klor-acetyl)-2-propionyl-anilin med smeltepunkt 76,5—77,5°C. A cooled (10°C ice bath) mixture of 105 parts acetic acid and 18 parts 2-propyanylaniline is added dropwise to 17 parts chlorine-acetyl chloride (exothermic reaction). After the addition is complete, the whole is stirred for 15 minutes at 10°C. Then 132 parts of sodium acetate/water (pre-prepared from 51 parts of sodium acetate and 128 parts of water) are added dropwise. After the addition is complete, the precipitate is filtered off, washed with water and dried to give N-(2-chloro-acetyl)-2-propionyl-aniline with melting point 76.5-77.5°C.

Erstattes i eksempel 5 2-propionyl-anilin med 3-propionyl-anilin, og ovenstående fremgangsmåte gjentas, fåes N(klor-acetyl)-3-propionyl-anilin med smeltepunkt 69,5—70,5°C. If in example 5 2-propionyl-aniline is replaced by 3-propionyl-aniline, and the above procedure is repeated, N(chloro-acetyl)-3-propionyl-aniline with a melting point of 69.5-70.5°C is obtained.

Eksempel 6. Example 6.

En blanding av 23,8 deler N-(2-klor-acetyl)-2,6-dimetyl-anilin, 19 deler dl-l-benzyl-2-metyl-piperazin, 32 deler natriumkarbonat, noen få krystaller natriumjodid i 520 deler 4-metyl-2-pentanon omrøres og kokes med tilbakeløps-kjøler i 48 timer. Etter avkjøling tilsettes 300 deler vann. Det organiske lag skilles fra, tørkes over magnesiumsulfat og fordampes. Den oljeaktige rest oppløses i diisopropyleter. Denne oppløsning filtreres inntil den er klar, og gassformet hydrogenklorid innføres i filtratet. Det faste bunnfall frafiltreres, kokes i 2-propanol, frafiltreres igjen og tørkes og gir et klebrig salt. Det omrøres i aceton og tørkes igjen og gir dl-l-benzyl-2-metyl-4-[(2,6-dimetyl-anilin-karbonyl)-metyl]-piperazin dihydroklorid, med smeltepunkt 273—274°C. A mixture of 23.8 parts of N-(2-chloro-acetyl)-2,6-dimethyl-aniline, 19 parts of dl-1-benzyl-2-methyl-piperazine, 32 parts of sodium carbonate, a few crystals of sodium iodide in 520 parts 4-methyl-2-pentanone is stirred and refluxed for 48 hours. After cooling, 300 parts of water are added. The organic layer is separated, dried over magnesium sulfate and evaporated. The oily residue is dissolved in diisopropyl ether. This solution is filtered until it is clear, and gaseous hydrogen chloride is introduced into the filtrate. The solid precipitate is filtered off, boiled in 2-propanol, filtered off again and dried to give a sticky salt. It is stirred in acetone and dried again to give dl-1-benzyl-2-methyl-4-[(2,6-dimethyl-aniline-carbonyl)-methyl]-piperazine dihydrochloride, with a melting point of 273-274°C.

Ved å gjenta eksempel 6, og erstatte N-2-(klor-acetyl)-2,6-dimetyl-anilin hvor dette kre-ves med en ekvimolekular mengde N-(2-brom-etyl)-anilin hydrobromid, og erstatte eventuelt dl-l-benzyl-2-metyl-piperazin, med en ekvimo-lekularmengde og l-benzyl-perhydro-l,4-diazepin, fåes følgende forbindelser: dl-l-benzyl-2-metyl-(2-anilin-etyl)-piperazin trihydroklorid med smeltepunkt 182— 217°C (dekomponering). l-benzyl-4-[(2,6-dimetyl-anilm-karbonyl)-metyl]-perhydro-l,4-diazepin dihydroklorid, med smeltepunkt 221—230°C. By repeating example 6, and replacing N-2-(chloro-acetyl)-2,6-dimethyl-aniline where this is required with an equimolecular amount of N-(2-bromo-ethyl)-aniline hydrobromide, and optionally replacing dl-1-benzyl-2-methyl-piperazine, with an equimolar amount and 1-benzyl-perhydro-1,4-diazepine, the following compounds are obtained: dl-1-benzyl-2-methyl-(2-aniline-ethyl )-piperazine trihydrochloride with melting point 182— 217°C (decomposition). 1-benzyl-4-[(2,6-dimethyl-anilm-carbonyl)-methyl]-perhydro-1,4-diazepine dihydrochloride, with melting point 221-230°C.

Eksempel 7. Example 7.

En blanding av 19 deler dl-l-benzyl-2-me-tylpiperazin, 32 deler natrium karbonat, noen få krystaller kaliumjodid i 500 deler 4-metyl-2-pentanon hvilken omrøres og kokes med tilbake-løpskj øler tilsettes dråpevis en oppløsning av 33,7 deler l-klor-4,4-di(4-fluor-fenyl)-butan i 50 deler 4-metyl-2-pentanon. Etter at tilsetningen er fullstendig, omrøres det hele og kokes med til-bakeløpskj øler i 48 timer. Etter avkjøling tilsettes 300 deler vann. Det organiske lag skilles fra, tørkes over magnesiumsulfat, filtreres og fordampes. Den uklare oppløsning filtreres flere ganger inntil den er klar, og deretter innføres gassformet hydrogenklorid i filtratet. Det utfelte faste salt frafiltreres og omkrystalliseres fra kokende 2-propanol. Etter avkjøling til romtemperatur frafiltreres det faste stoff og tørkes og gir dl-l-[4,4-di-(4-fluor-fenyl)-butyl]-3-metyl-4-benzyl-piperazin dihydroklorid, med smeltepunkt 222—225°C. A mixture of 19 parts of dl-1-benzyl-2-methylpiperazine, 32 parts of sodium carbonate, a few crystals of potassium iodide in 500 parts of 4-methyl-2-pentanone which is stirred and refluxed is added dropwise to a solution of 33.7 parts of 1-chloro-4,4-di(4-fluoro-phenyl)-butane in 50 parts of 4-methyl-2-pentanone. After the addition is complete, everything is stirred and boiled with reflux for 48 hours. After cooling, 300 parts of water are added. The organic layer is separated, dried over magnesium sulphate, filtered and evaporated. The cloudy solution is filtered several times until it is clear, and then gaseous hydrogen chloride is introduced into the filtrate. The precipitated solid salt is filtered off and recrystallized from boiling 2-propanol. After cooling to room temperature, the solid is filtered off and dried to give dl-1-[4,4-di-(4-fluoro-phenyl)-butyl]-3-methyl-4-benzyl-piperazine dihydrochloride, melting point 222-225 °C.

Det å gjenta eksempel 7, men erstatte dl-1-benzyl-2-metyl-piperazin med en ekvimolar mengde l-benzyl-perhydro-l,4-diazipin, fåes forbindelsen l-[4,4-di(4-fluor-fenyl)-butyl-]4-benzyl-perhydro-l,4-diazepin dihydroklorid, med smeltepunkt 215,4—216,4°C. Repeating Example 7, but replacing dl-1-benzyl-2-methyl-piperazine with an equimolar amount of 1-benzyl-perhydro-1,4-diazipine, the compound 1-[4,4-di(4-fluoro- phenyl)-butyl-]4-benzyl-perhydro-1,4-diazepine dihydrochloride, melting point 215.4-216.4°C.

Eksempel 8. Example 8.

En oppløsning av 26 deler dl-l-benzyl-2-metyl-4-[2,6-dimetyl-anilin, karbonyl)-metyl]-piperazin i 280 deler denaturert etanol hydreres ved normalt trykk og ved romtemperatur i nærvær av 10 deler palladium- på trekull katalysator som er 5 pst.'ig. Etter at den beregnede mengde hydrogen er opptatt, stoppes hydreringen. Katalysatoren filtreres fra, og filtratet fordampes. Den oljeaktige rest størkner ved henstand. Det faste stoff frafiltreres og gir dl-2-metyl-4-[(2,6-dimetyl-anilin-karbonyl)-metyl]-piperazin, med smeltepunkt 94—95°C. A solution of 26 parts of dl-1-benzyl-2-methyl-4-[2,6-dimethyl-aniline, carbonyl)-methyl]-piperazine in 280 parts of denatured ethanol is hydrated at normal pressure and at room temperature in the presence of 10 parts palladium on charcoal catalyst which is 5 percent. After the calculated amount of hydrogen has been taken up, the hydrogenation is stopped. The catalyst is filtered off, and the filtrate is evaporated. The oily residue solidifies on standing. The solid is filtered off and gives dl-2-methyl-4-[(2,6-dimethyl-aniline-carbonyl)-methyl]-piperazine, with a melting point of 94-95°C.

Ved å gjenta eksempel 8, men erstatte dl-1-benzyl-2-metyl-4-[(2,6-dimetyl-anilin-karbonyl)-metyl]-piperazin med ekvimolare mengder av de tilsvarende benzyl-derivater erholdt ved eksemplene 6 og 7 fåes følgende forbindelser: By repeating Example 8, but replacing dl-1-benzyl-2-methyl-4-[(2,6-dimethyl-aniline-carbonyl)-methyl]-piperazine with equimolar amounts of the corresponding benzyl derivatives obtained in Examples 6 and 7 the following compounds are obtained:

dl-2-metyl-4-(2-anilin-etyl)-piperazin, med kokepunkt 119—120°C ved 0,15 mm trykk. i 4-[(2,6-dimetyl-anilm-karbonyl)-metyl-]-perhydro-l,4-diazepin, smeltepunkt 80—86°C. dl-l-[4,4-di-(4-fluor-fenyl)-butyl]-3-metyl-piperazin, kokepunkt 170—175°C ved 0,15 mm trykk. l-[4,4-di-(4-fluor-fenyl)-butyl]-perhydro-1,4-diazepin, kokepunkt 195—197°C ved 0,05 mm trykk. dl-2-methyl-4-(2-aniline-ethyl)-piperazine, boiling point 119-120°C at 0.15 mm pressure. in 4-[(2,6-Dimethyl-anilm-carbonyl)-methyl-]-perhydro-1,4-diazepine, melting point 80-86°C. dl-1-[4,4-di-(4-fluoro-phenyl)-butyl]-3-methyl-piperazine, boiling point 170-175°C at 0.15 mm pressure. 1-[4,4-di-(4-fluoro-phenyl)-butyl]-perhydro-1,4-diazepine, boiling point 195-197°C at 0.05 mm pressure.

Eksempel 9. Example 9.

202 deler N-(2-brom-etyl)-anilin hydrobromid settes porsjonsvis til 494,5 deler piperazin i 2000 deler 2-propanol ved romtemperatur over et tidsrom av 3 timer. Det hele omrøres deretter natten over hvoretter det utfelte faste stoff frafiltreres. Filtratet fordampes og resten gjøres alkalisk. Det hele ekstraheres med kloroform. Ekstraktet vaskes med vann, tørkes over magnesiumsulfat, filtreres og fordampes. Den oljeaktige rest destilleres i vakuum og gir 4-(2-anilin-etyl)-piperazin, kokepunkt 140—160°C ved 0,4— 0,5 mm. trykk. 202 parts of N-(2-bromo-ethyl)-aniline hydrobromide are added portionwise to 494.5 parts of piperazine in 2000 parts of 2-propanol at room temperature over a period of 3 hours. The whole is then stirred overnight after which the precipitated solid is filtered off. The filtrate is evaporated and the residue made alkaline. The whole is extracted with chloroform. The extract is washed with water, dried over magnesium sulphate, filtered and evaporated. The oily residue is distilled in vacuum and gives 4-(2-aniline-ethyl)-piperazine, boiling point 140-160°C at 0.4-0.5 mm. Print.

Ved å gjenta eksempel 9 men erstatte N-(2-brom-etyl)-anilin hydrobromid med en ekvimolekular mengde N-(2-kloracetyl)-2,6-dime-I tyl-anilin, fåes forbindelsen 4-[(2,6-dimetyl-anilin-karbonyl)-metyl]-piperazin med smeltepunkt 110—114°C. By repeating Example 9 but replacing N-(2-bromo-ethyl)-aniline hydrobromide with an equimolecular amount of N-(2-chloroacetyl)-2,6-dimethyl-1 ethyl-aniline, the compound 4-[(2, 6-dimethyl-aniline-carbonyl)-methyl]-piperazine with melting point 110-114°C.

Eksempel 10. Example 10.

En blanding av 143 deler l-klor-4,4-difenyl-butan, 309 deler piperazin og 800 deler 2-propanol omrøres og kokes med tilbakeløpskj øler i 15 timer. Etter avkjøling vaskes reaksjonsblandingen med vann. Det organiske lag skilles fra, tørkes over kaliumkarbonat, filtreres og fordampes. Den oljeaktige rest destilleres i vakuum og gir l-(4,4-difenyl-butyl)-piperazin, med kokepunkt 177—179°C ved 0,3 mm trykk. A mixture of 143 parts of 1-chloro-4,4-diphenyl-butane, 309 parts of piperazine and 800 parts of 2-propanol is stirred and refluxed for 15 hours. After cooling, the reaction mixture is washed with water. The organic layer is separated, dried over potassium carbonate, filtered and evaporated. The oily residue is distilled in vacuo to give 1-(4,4-diphenyl-butyl)-piperazine, with a boiling point of 177-179°C at 0.3 mm pressure.

Ved å gjenta eksempel 10, men å erstatte l-klor-4,4-difenyl-butan med ekvimolekulare mengder av den tilsvarende -halo-4,4-di-aryl-butan, fåes de forbindelser som angitt i følgende tabell 1: By repeating example 10, but replacing 1-chloro-4,4-diphenyl-butane with equimolecular amounts of the corresponding -halo-4,4-di-aryl-butane, the compounds indicated in the following table 1 are obtained:

Følgende eksempler illustrerer fremgangs-måten ifølge oppfinnelsen: The following examples illustrate the method according to the invention:

Eksempel 15. Example 15.

En blanding av 4,6 deler l-[4,4-di-(4-fluor-fenyl) -butyl]-4- (2-klor-etyl) -piperazin dihydroklorid, 1,3 deler 4-fluor-anilin, 35 deler tri-etylamin og 180 deler xylen kokes med tilbake-løpskj øler i 20 timer. Etter avkjøling tilsettes 100 deler vann. Det organiske lag skilles fra, tørkes over kaliumkarbonat og fordampes. Den oljeaktige rest oppløses i diisopropyleter og gassformet hydrogenklorid innføres i oppløsningen. Det utfelte salt filtreres fra og omkrystalliseres fra 2-propanol og gir l-[4,4-di-(4-fluor-fenyl)-butyl]-4- [ 2 - (4- fluor- anilin) - etyl ] -piper azinhydro-klorid med smeltepunkt 221—224°C. A mixture of 4.6 parts of 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-(2-chloro-ethyl)-piperazine dihydrochloride, 1.3 parts of 4-fluoro-aniline, 35 parts of triethylamine and 180 parts of xylene are refluxed for 20 hours. After cooling, 100 parts of water are added. The organic layer is separated, dried over potassium carbonate and evaporated. The oily residue is dissolved in diisopropyl ether and gaseous hydrogen chloride is introduced into the solution. The precipitated salt is filtered off and recrystallized from 2-propanol to give 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-[2-(4-fluoro-aniline)-ethyl]-piper azine hydrochloride with melting point 221-224°C.

Ved å gjenta det foregående eksempel men erstatte 4-fluor-anilin med ekvimolekulare mengder av respektive 3-metoksy-anilin og 4-metoksy-anilin, fåes følgende forbindelser: l-[4,4-di-(4-fluor-fenyl)-butyl]-4-[2- (3-metoksy-anilin)-etyl]-piperazin trihydroklorid med smeltepunkt 193—194,5°C. l-[4,4-di-(4-fluor-fenyl-butyl)]-4-[2- (4-metoksy-anilin) -etyl]-piperazin trihydroklorid med smeltepunkt 219—221°C. By repeating the previous example but replacing 4-fluoro-aniline with equimolecular amounts of respective 3-methoxy-aniline and 4-methoxy-aniline, the following compounds are obtained: 1-[4,4-di-(4-fluoro-phenyl) -butyl]-4-[2-(3-methoxy-aniline)-ethyl]-piperazine trihydrochloride with melting point 193-194.5°C. 1-[4,4-di-(4-fluoro-phenyl-butyl)]-4-[2-(4-methoxy-aniline)-ethyl]-piperazine trihydrochloride with melting point 219-221°C.

Eksempel 16. Example 16.

En blanding av 2 deler dl-l-klor-4-(4-metyl-fenyl)-4-fenyl-butan, 1,6 deler l-(2-anilin-etyl)- piperazin, 0,32 deler natriumkarbonat, noen få krystaller kaliumjodid i 200 deler 4-metyl-2-pentanon omrøres og kokes med tilbake-løpskj øler i 90 timer. Etter avkjøling tilsettes 80 deler vann. Det organiske lag skilles fra, tør-kes over kalium karbonat, filtreres og fordampes. Den oljeaktige rest oppløses i 350 deler vannfri diisopropyleter. Oppløsningen filtreres og gassformet hydrogenklorid innføres i filtratet. Det utfelte salt filtreres fra og omkrystalliseres fra en blanding av 80 deler 2-propanol og 160 deler metanol. Den filtrerte oppløsning holdes i 2 dager ved 0°C. Deretter frafiltreres det dannede bunnfall og tørkes og gir dl-l-[4-fenyl-4- (4-metyl-f enyl) -butyl] -4- (2-anilin-etyl) - piperazin trihydroklorid med smeltepunkt 207— 214,5°C (dekomponering). A mixture of 2 parts dl-1-chloro-4-(4-methyl-phenyl)-4-phenyl-butane, 1.6 parts 1-(2-aniline-ethyl)-piperazine, 0.32 parts sodium carbonate, some few crystals of potassium iodide in 200 parts of 4-methyl-2-pentanone are stirred and refluxed for 90 hours. After cooling, 80 parts of water are added. The organic layer is separated, dried over potassium carbonate, filtered and evaporated. The oily residue is dissolved in 350 parts of anhydrous diisopropyl ether. The solution is filtered and gaseous hydrogen chloride is introduced into the filtrate. The precipitated salt is filtered off and recrystallized from a mixture of 80 parts of 2-propanol and 160 parts of methanol. The filtered solution is kept for 2 days at 0°C. The precipitate formed is then filtered off and dried to give dl-1-[4-phenyl-4-(4-methyl-phenyl)-butyl]-4-(2-aniline-ethyl)-piperazine trihydrochloride with melting point 207-214, 5°C (decomposition).

Ved å gjenta eksempel 16, men erstatte dl-1-klor-4-(4-metyl-f enyl)-4-fenyl-butan med en By repeating Example 16, but replacing dl-1-chloro-4-(4-methyl-phenyl)-4-phenyl-butane with a

egnet mengde av den ønskede dl-l-klor-4,4-di-arylbutan og erstatte 1-(2-anilin-etyl)-piperazin med ekvimolekulare mengder 4-substituerte piperaziner eller 4-substituerte perhydro-l,4-diazepiner ifølge eksemplene 8 og 9 når dette kre-ves, fåes de 'forbindelser som er angitt i følgende tabell 2: suitable amount of the desired dl-1-chloro-4,4-di-arylbutane and replace 1-(2-aniline-ethyl)-piperazine with equimolecular amounts of 4-substituted piperazines or 4-substituted perhydro-1,4-diazepines according to examples 8 and 9 when this is required, the compounds indicated in the following table 2 are obtained:

Eksempel 24. Example 24.

En vandig oppløsning av 8,3 deler N-(2-brom-etyl)-l-naftyl-amin hydrobromid gjøres alkalisk med ammonium hydroksyd oppløsning og ekstraheres flere ganger med 80 deler xylen. Oppløsningsmidlet tørkes over vannfri magnesiumsulfat. Det tilsettes 16,5 deler l-[4,4-di-(4-fluor-fenyl)-butyl]-piperazin og det hele om-røres og kokes med tilbakeløpskj øler i 24 timer. Etter avkjøling av reaksjonsblandingen frafiltreres det utfelte faste stoff (hovedsakelig hy-drobromsalt av utgangsmaterialet). Filtratet fordampes. Den oljeaktige rest vaskes med vann, og ekstraheres flere ganger med eter. De sam-menslåtte ekstrakter tørkes over kalium karbonat, filtreres og gassformet hydrogen innføres i filtratet. Det utfelte salt frafiltreres og omkrystalliseres fra 2-propanol og gir 1-[4,4-di-(4-fluor-fenyl) -butyl] -4-[2- (1-naftylamino) - etyl]- piperazin dihydroklorid med smeltepunkt 215—219°C. An aqueous solution of 8.3 parts of N-(2-bromoethyl)-1-naphthylamine hydrobromide is made alkaline with ammonium hydroxide solution and extracted several times with 80 parts of xylene. The solvent is dried over anhydrous magnesium sulfate. 16.5 parts of 1-[4,4-di-(4-fluoro-phenyl)-butyl]-piperazine are added and the whole is stirred and refluxed for 24 hours. After cooling the reaction mixture, the precipitated solid (mainly hydrobromide salt of the starting material) is filtered off. The filtrate is evaporated. The oily residue is washed with water and extracted several times with ether. The combined extracts are dried over potassium carbonate, filtered and gaseous hydrogen is introduced into the filtrate. The precipitated salt is filtered off and recrystallized from 2-propanol to give 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-[2-(1-naphthylamino)-ethyl]-piperazine dihydrochloride with melting point 215-219°C.

Eksempel 25. Example 25.

En blanding av 5,9 deler l-(4,4-difenyl-butyl) -piperazin, 6,2 deler N-(2-brom-etyl)-anilin-hydrobromid, 8,5 deler natrium karbonat, noen få krystaller kaliumjodid, og 160 deler 4-metyl-2-pentanon omrøres og kokes med tilbakeløpskj ø-ler i 48 timer. Etter avkjøling tilsettes 150 deler vann. Det organiske lag skilles fra, tørkes over kaliumkarbonat, og fordampes. Den oljeaktige rest oppløses i 420 deler diisopropyleter. Opp-løsningen filtreres flere ganger inntil den er klar, og gassformet hydrogenklorid innføres i filtratet. Det utfelte salt frafiltreres og omkrystalliseres fra en blanding 160 deler 2-propanol og 120 deler denaturert etanol. Etter av-kjøling natten over ved romtemperatur, frafiltreres det faste stoff og tørkes i vakuum og gir 1-(4,4-dif enyl-butyl) -4- (2-anilin-etyl) -piperazin trihydroklorid med smeltepunkt 227—229°C. A mixture of 5.9 parts of 1-(4,4-diphenyl-butyl)-piperazine, 6.2 parts of N-(2-bromo-ethyl)-aniline hydrobromide, 8.5 parts of sodium carbonate, a few crystals of potassium iodide , and 160 parts of 4-methyl-2-pentanone are stirred and refluxed for 48 hours. After cooling, 150 parts of water are added. The organic layer is separated, dried over potassium carbonate and evaporated. The oily residue is dissolved in 420 parts of diisopropyl ether. The solution is filtered several times until it is clear, and gaseous hydrogen chloride is introduced into the filtrate. The precipitated salt is filtered off and recrystallized from a mixture of 160 parts of 2-propanol and 120 parts of denatured ethanol. After cooling overnight at room temperature, the solid is filtered off and dried in vacuo to give 1-(4,4-diphenyl-butyl)-4-(2-aniline-ethyl)-piperazine trihydrochloride with melting point 227-229° C.

Ved å gjenta eksempel 14 og ved å erstatte l-(4,4-difenyl-butyl)-piperazin med ekvimolekulare mengder av den egnede l-(4,4-diaryl-butyl)-piperazin eller med egnet l-(4,4-diaryl-butyl)-perhydro-l,4-diazepin, og erstatte N-(2-brom-etyl)-anilin hydrobromid med ekvimolekulare mengder av det tilsvarende halo-alk-X-NR,-Ar.1 derivat, fåes de forbindelser som er angitt i følgende tabell 3. By repeating Example 14 and replacing l-(4,4-diphenyl-butyl)-piperazine with equimolar amounts of the appropriate l-(4,4-diaryl-butyl)-piperazine or with appropriate l-(4,4 -diaryl-butyl)-perhydro-1,4-diazepine, and replacing N-(2-bromo-ethyl)-aniline hydrobromide with equimolecular amounts of the corresponding halo-alk-X-NR,-Ar.1 derivative, they are obtained compounds listed in the following Table 3.

Eksempel 105. Example 105.

En blanding av 20,8 deler l-(4,4-difenyl-butyl) -4- (2-anilin-etyl) -piperazin trihydroklorid, 20 deler eddiksyre anhydrid, 56 deler trietyl-amin og 600 deler kloroform omrøres og kokes med tilbakeløpskj øler 1 2 timer. Etter avkjøling tilsettes 500 deler vann, og det hele gjøres sterkt alkalisk ved tilsetting av natriumhydroksydopp-løsning. Det organiske lag helles fra, vaskes tre ganger med 500 deler vann, tørkes over magnesiumsulfat og fordampes. Den oljeaktige rest oppløses i vannfri eter og gassformet hydrogenklorid innføres i oppløsningen. Det utfelte salt frafiltreres og omkrystalliseres to ganger, først fra 240 deler 1-propanol og deretter fra en blanding av 360 deler 2-propanol og 240 deler aceton, og gir l-(4,4-difenyl-butyl)-4-[2-(N-acetyl-anilin)-etyl]-piperazin dihydroklorid med smeltepunkt 221—223°C. A mixture of 20.8 parts of 1-(4,4-diphenyl-butyl)-4-(2-aniline-ethyl)-piperazine trihydrochloride, 20 parts of acetic anhydride, 56 parts of triethylamine and 600 parts of chloroform is stirred and boiled with return queue takes 1 2 hours. After cooling, 500 parts of water are added, and the whole is made strongly alkaline by the addition of sodium hydroxide solution. The organic layer is poured off, washed three times with 500 parts of water, dried over magnesium sulfate and evaporated. The oily residue is dissolved in anhydrous ether and gaseous hydrogen chloride is introduced into the solution. The precipitated salt is filtered off and recrystallized twice, first from 240 parts of 1-propanol and then from a mixture of 360 parts of 2-propanol and 240 parts of acetone, giving 1-(4,4-diphenyl-butyl)-4-[2 -(N-acetyl-aniline)-ethyl]-piperazine dihydrochloride with melting point 221-223°C.

Ved å gjenta foregående eksempel og erstatte 1- (4,4-dif enyl-butyl) -4- (2-anilin-etyl) - piperazin trihydroklorid med ekvimolekulare mengder av det tilsvarende l-(4,4-diaryl-butyl)-4-(2-anilin-etyl)-piperazin, og acylere dette med den egnede mengde av det tilsvarende syrean-hydrid, fåes de forbindelser som er angitt i føl-gende tabell: By repeating the previous example and replacing 1-(4,4-diphenyl-butyl)-4-(2-aniline-ethyl)-piperazine trihydrochloride with equimolecular amounts of the corresponding 1-(4,4-diaryl-butyl)- 4-(2-aniline-ethyl)-piperazine, and acylate this with the appropriate amount of the corresponding acid hydride, the compounds indicated in the following table are obtained:

Eksempel 111. Example 111.

En vandig oppløsning av 14 deler dl-l-[4-f enyl-4(4-fluor-f enyl) -butyl] -4- [2- (anilin-carbonyl)-etyl]-piperazin dihydroklorid gjøres alkalisk med natriumhydroksyd og ekstraheres med kloroform. Ekstraktet tørkes over magne-sium sulfat, filtreres og fordampes. Resten opp-løses i 100 deler tetrahydrofuran. Denne opp-løsning tilsettes en suspensjon av 2,1 deler li-tium tetrahydroaluminat i 100 deler tetrahydrofuran, mens temperaturen holdes ved ca. 30°C (svakt eksoterm reaksjon). Det hele omrøres og kokes med tilbakeløpskj øler i 3 timer. Etter av-kjøling av reaksjonsblandingen til under 15°C spaltes den ved sukssesiv tilsetting av 7 deler vann, 17,5 deler natrium hydroksyd oppløsning som er 20 pst.'ig og 7 deler vann. Blandingen filtreres og det gelatinøse bunnfall vaskes to ganger med eter. Det organiske lag tørkes over kaliumkarbonat, filtreres og fordampes. Resten oppløses i 560 deler eter. Oppløsningen tørkes over kalium karbonat, filtreres og gassformet hydrogenklorid innføres i filtratet. Det utfelte salt frafiltreres og omkrystalliseres fra en blanding av 400 deler metanol og 20 deler vann og gir dl-1- [4-fenyl-4- (4-fluor-fenyl) -butyl]-4- An aqueous solution of 14 parts of dl-1-[4-phenyl-4(4-fluoro-phenyl)-butyl]-4-[2-(aniline-carbonyl)-ethyl]-piperazine dihydrochloride is made alkaline with sodium hydroxide and extracted with chloroform. The extract is dried over magnesium sulphate, filtered and evaporated. The residue is dissolved in 100 parts of tetrahydrofuran. A suspension of 2.1 parts lithium tetrahydroaluminate in 100 parts tetrahydrofuran is added to this solution, while the temperature is kept at approx. 30°C (slightly exothermic reaction). The whole thing is stirred and boiled with reflux beer for 3 hours. After cooling the reaction mixture to below 15°C, it is decomposed by the successive addition of 7 parts of water, 17.5 parts of sodium hydroxide solution which is 20% and 7 parts of water. The mixture is filtered and the gelatinous precipitate is washed twice with ether. The organic layer is dried over potassium carbonate, filtered and evaporated. The remainder is dissolved in 560 parts of ether. The solution is dried over potassium carbonate, filtered and gaseous hydrogen chloride is introduced into the filtrate. The precipitated salt is filtered off and recrystallized from a mixture of 400 parts methanol and 20 parts water to give dl-1-[4-phenyl-4-(4-fluoro-phenyl)-butyl]-4-

(3-anilin-propyl)-piperazin trihydroklorid med smeltepunkt 247—250,5°C. (3-aniline-propyl)-piperazine trihydrochloride with melting point 247-250.5°C.

Ved å gjenta eksempel 111, men erstatte dl-l-[4-fenyl-4-(4-fluor-fenyl)-butyl]-4-[2-(anilin-karbonyl)-etyl]-piperazin dihydroklorid med egnede mengder av det tilsvarende anilid, fåes følgende forbindelser: 1- [4,4-di- (4-f luor-f enyl) -butyl] -4- (3-anilin-propyl) -piperazin trihydroklorid, med smeltepunkt 235,5—236,5°C. dl.-l- [4,4-di- (4-f luor-f enyl) -butyl] -4-(l-anilin-2-propyl)-piperazin dioksalat, smeltepunkt 224—225 °C. By repeating Example 111, but replacing dl-1-[4-phenyl-4-(4-fluoro-phenyl)-butyl]-4-[2-(aniline-carbonyl)-ethyl]-piperazine dihydrochloride with suitable amounts of the corresponding anilide, the following compounds are obtained: 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-(3-aniline-propyl)-piperazine trihydrochloride, with melting point 235.5—236 .5°C. dl.-1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-(1-aniline-2-propyl)-piperazine dioxalate, melting point 224-225 °C.

Eksempel 112. Example 112.

En blanding av 1,28 deler litiumtetrahyd-ridoaluminat og 45 deler tetrahydrofuran tilsettes dråpevis en oppløsning av 8 deler l-(4,4-difenyl-butyl)-4-[2-(N-propionyl-anilin)-etyl]-piperazin i 45 deler tetrahydrofuran (svakt eksoterm reaksjon). Etter at tilsetningen er fullstendig, omrøres det hele og kokes med tilbakeløpskj øler i 3 timer. Etter avkjøling spaltes reaksjonsblandingen ved en suksessiv tilsetning av 5 deler vann, 5 deler av en 20 pst.ig natriumhydroksyd-oppløsning og 10 deler vann. Det hele filtreres fra en del uoppløst stoff, og filtratet fordampes. Den oljeaktige rest oppløses i vannfri eter, og gassformet hydrogenklorid innføres i oppløsnin-gen. Det utfelte salt frafiltreres og omkrystalliseres fra 120 deler metanol og gir 1-4,4-difenyl-butyl) -4- [2-N-propyl-anilin) -etyl] -piperazin-dihydroklorid med smeltepunkt 210—213,5°C. A mixture of 1.28 parts of lithium tetrahydroaluminate and 45 parts of tetrahydrofuran is added dropwise to a solution of 8 parts of 1-(4,4-diphenyl-butyl)-4-[2-(N-propionyl-aniline)-ethyl]-piperazine in 45 parts tetrahydrofuran (slightly exothermic reaction). After the addition is complete, everything is stirred and boiled with reflux for 3 hours. After cooling, the reaction mixture is decomposed by the successive addition of 5 parts of water, 5 parts of a 20% sodium hydroxide solution and 10 parts of water. It is all filtered from some undissolved material, and the filtrate is evaporated. The oily residue is dissolved in anhydrous ether, and gaseous hydrogen chloride is introduced into the solution. The precipitated salt is filtered off and recrystallized from 120 parts of methanol to give 1-4,4-diphenyl-butyl)-4-[2-N-propyl-aniline)-ethyl]-piperazine dihydrochloride with melting point 210-213.5°C .

Ved å gjenta eksempel 17, men å erstatte 1- (4,4-dif enyl-butyl) -4- [2- (N-propionyl-anilin) - etyl]-piperazin med en ekvimolekular mengde av det tilsvarende 1-[4,4-di- (4-f luor-f enyl)-butyl] - 4-[2-(N-acyl-anilin)-etyl]-piperaziner, fåes føl-gende forbindelser: 1- [4,4-di- (4-fluor-f enyl) -butyl] -4-[2- (N-etyl-anilin)-etyl]-piperazin trihydroklorid, med smeltepunkt 214—216°C. By repeating Example 17, but replacing 1-(4,4-diphenyl-butyl)-4-[2-(N-propionyl-aniline)-ethyl]-piperazine with an equimolar amount of the corresponding 1-[4 ,4-di-(4-fluoro-phenyl)-butyl]-4-[2-(N-acyl-aniline)-ethyl]-piperazines, the following compounds are obtained: 1- [4,4-di - (4-fluoro-phenyl)-butyl]-4-[2-(N-ethyl-aniline)-ethyl]-piperazine trihydrochloride, melting point 214-216°C.

1- [4,4-di- (4-f luor-f enyl) -butyl] -4- [2- (N-propyl-anilin) -etyl] -piperazin trihydroklorid, med smeltepunkt 219—226°C. 1-[4,4-di-(4-fluoro-phenyl)-butyl]-4-[2-(N-propyl-aniline)-ethyl]-piperazine trihydrochloride, melting point 219-226°C.

Claims

Process for the preparation of new therapeutically active compounds of the general formula:

where Ar, and Ar2 means phenyl, lower alkylphenyl, halophenyl or trifluoromethylphenyl, m means 2 or 3, Alk means -CH(CH;))- or -(CH2)„-where n is 1, 2 or 3, X means a carbonyl or methylene radical, R means hydrogen or methyl, R means hydrogen, lower alkyl or lower alkylcarbonyl, and Ar3 means one of the groups where R2 and R3 mean hydrogen, lower alkyl, lower alkoxy, halogen or nitro, and R4 is lower alkylcarbonyl, as well as their therapeutically acceptable acid addition salts, characterized by) that a compound of the general formula is reacted with a compound of the general formula where Ar1; Ar2, Ar3, m, X, Alk, R and Rt have the above meaning, and Y is a reactive ester function, or b) that a compound with the general formula: is reacted with a compound of the general formula where Ar,', Ar2, Ar3, m, X, Alk, R and Rt have the above meaning and Y is a reactive ester function, or c) that a compound with the general formula: reacted with a compound of the general formula: where Ar 1 , Ar 2 , m, Alk, R and Y have the above meaning, either before or after conversion of the hydroxyl group to a reactive ester function to form a compound of the general formula: and the compound obtained is reacted with a compound with the general formula: to form a compound of formula 1, wherein X is -CHg-, and if desired, the resulting compound of formula 1 is converted into its therapeutically acceptable acid addition salt by reaction with a suitable acid, and optionally by the resulting compound of formula 1, when R, is hydrogen, is acylated to form the corresponding compound where R, is a lower alkyl-carbonyl group, and optionally by the obtained compound of formula 1 when, X is carbonyl or R, is lower alkyl-carbonyl, is reduced to form the corresponding compound where respectively X is -CHg- and R is lower alkyl.