CH300442A - Process for the preparation of an aryl-substituted pyrazoline compound. - Google Patents

Process for the preparation of an aryl-substituted pyrazoline compound.

Info

Publication number
CH300442A
CH300442A CH300442DA CH300442A CH 300442 A CH300442 A CH 300442A CH 300442D A CH300442D A CH 300442DA CH 300442 A CH300442 A CH 300442A
Authority
CH
Switzerland
Prior art keywords
aryl
preparation
compound
substituted pyrazoline
pyrazoline compound
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Ilford
Original Assignee
Ilford Ltd
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 Ilford Ltd filed Critical Ilford Ltd
Publication of CH300442A publication Critical patent/CH300442A/en

Links

Description

  

  Verfahren zur Herstellung einer     arylsubstituierten        Pyrazolinverbindung.       Im Hauptpatent ist ein Verfahren zur Her  stellung einer     arylsubstituierten        Pyrazolin-          verbindung    beschrieben, welches dadurch     ge-          kennzeichnet    ist, dass man eine den     Rest     
EMI0001.0009     
    abgebende     Verbindung    mit     Phenylhydrazin-          p-sulfonsäure        kondensiert.    Als     zur    Abgabe  dieses Restes geeignete     Verbindungen    wer  ,

   den     Benzalacetophenon        und    seine     Dialkyl-          amino-Additionsverbindungen    genannt.  Gegenstand des vorliegenden Patentes ist  gleichfalls ein Verfahren     zur    Herstellung  einer     arylsubstituierten        Pyrazolinverbindung,     bei welchem aber eine den Rest  
EMI0001.0023     
    abgebende Verbindung mit     Phenylhydrazin-          p-sulfonsäure    kondensiert wird.  



  <I>Beispiel:</I>  6 Teile     Phenylhydrazin    - p -     sulfonsäure          (86,6o/oig)    werden in 150 Teilen     Wasser    sus  pendiert, ein Teil reiner konzentrierter Salz  säure (37     o/oig)    wird hinzugefügt und schliess  lich noch 5,5 Teile     p'-Methylchalkon.    Die         .Mischung    wird unter     Rückfluss        und    Rühren  während 5 Stunden im Sieden erhalten.

   Nach  einer Stunde     sind    alle     Reaktionskomponenten     in     Lösung    gegangen, und die gelbliche, klare  Flüssigkeit     wird    weiter gerührt. Nach dem  Abkühlen wird die Lösung kongoneutral ge  macht durch Zugabe von 12 -Teilen     Natrium-          carbonatlösung        (15o/oig),    und es wird mit  50     Teilen        Salzsole        (25o/oig)        ausgesalzen.    Das  erhaltene     1-(p-Sulfophenyl)-3=        (p-tolyl)

  -5-          phenyl-pyrazolin    kristallisiert in schwach gelb  gefärbten Plättchen.  



  Die neue Verbindung, das 1-(p -     Sulfo-          phenyl)-3-(p-tolyl)-5-phenyl-pyrazolin,    soll  als     Aufhellungsmittel    benutzt werden..



  Process for the preparation of an aryl-substituted pyrazoline compound. In the main patent, a process for the preparation of an aryl-substituted pyrazoline compound is described, which is characterized in that one the remainder
EMI0001.0009
    donating compound condensed with phenylhydrazine p-sulfonic acid. As compounds suitable for the delivery of this residue who,

   called the benzalacetophenone and its dialkylamino addition compounds. The present patent also relates to a process for the preparation of an aryl-substituted pyrazoline compound, in which, however, one is the remainder
EMI0001.0023
    donating compound is condensed with phenylhydrazine p-sulfonic acid.



  <I> Example: </I> 6 parts of phenylhydrazine - p - sulfonic acid (86.6%) are suspended in 150 parts of water, one part of pure concentrated hydrochloric acid (37%) is added and finally 5 , 5 parts of p'-methyl chalcone. The mixture is obtained under reflux and stirring for 5 hours at the boil.

   After one hour, all the reaction components have gone into solution and the yellowish, clear liquid is stirred further. After cooling, the solution is made Congo-neutral by adding 12 parts of sodium carbonate solution (15%) and salting out with 50 parts of brine (25%). The obtained 1- (p-sulfophenyl) -3 = (p-tolyl)

  -5- phenyl-pyrazoline crystallizes in pale yellow colored platelets.



  The new compound, 1- (p - sulfophenyl) -3- (p-tolyl) -5-phenyl-pyrazoline, is said to be used as a lightening agent.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer arylsub- stituierten Pyrazolinverbindung, dadurch ge kennzeichnet, dass man eine den Rest EMI0001.0056 abgebende Verbindung mit Phenylhydrazin-p- sulfonsäure kondensiert. Die neue Verbindung, das 1-(p-Sulfo- phenyl)-3-(p-tolyl)-5-phenyl-pyrazolin, bildet; schwach gelb gefärbte Plättchen. PATENT CLAIM: Process for the production of an aryl-substituted pyrazoline compound, characterized in that one is the remainder EMI0001.0056 donating compound condensed with phenylhydrazine-p-sulfonic acid. The new compound which forms 1- (p-sulfophenyl) -3- (p-tolyl) -5-phenyl-pyrazoline; pale yellow colored platelets.
CH300442D 1950-06-03 1950-06-03 Process for the preparation of an aryl-substituted pyrazoline compound. CH300442A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH300442T 1950-06-03
CH293111T 1950-06-03

Publications (1)

Publication Number Publication Date
CH300442A true CH300442A (en) 1954-07-31

Family

ID=25733322

Family Applications (1)

Application Number Title Priority Date Filing Date
CH300442D CH300442A (en) 1950-06-03 1950-06-03 Process for the preparation of an aryl-substituted pyrazoline compound.

Country Status (1)

Country Link
CH (1) CH300442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458789B1 (en) * 1964-12-16 1972-10-26 Creusot Loire Process for the direct reduction of hard-to-reduce ores

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458789B1 (en) * 1964-12-16 1972-10-26 Creusot Loire Process for the direct reduction of hard-to-reduce ores

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