CH149697A - Process for the preparation of 6'-chloro-6-methylnaphthalene tetrahydride-1.2.3.4. - Google Patents

Process for the preparation of 6'-chloro-6-methylnaphthalene tetrahydride-1.2.3.4.

Info

Publication number
CH149697A
CH149697A CH149697DA CH149697A CH 149697 A CH149697 A CH 149697A CH 149697D A CH149697D A CH 149697DA CH 149697 A CH149697 A CH 149697A
Authority
CH
Switzerland
Prior art keywords
tetrahydride
methylnaphthalene
chloro
preparation
hydrochloric acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH149697A publication Critical patent/CH149697A/en

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     6'-Chlor-6-inethylriaplitalintetraliydrid-1    . 2.3 .4.         Nach    der     Erfindung    erhält man     6'-Chlor-          6        -methylnaphtalintetrahydrid-1    . 2 . 3 . 4,  wenn man     1.2.3.4-Tetrahydronaphtalin     mit Formaldehyd und     konzentrierter    Chlor  wasserstoffsäure behandelt. Um eine hin  reichende Konzentration der Säure aufrecht  zuerhalten, leitet man zweckmässig während  der Reaktion, die unter Rühren und vorsich  tigem Erwärmen verläuft, gasförmigen  Chlorwasserstoff ein.  



  Das     6'-Chlor-6-methylnaphtalin-tetrahy-          drid-1.2.3.4    bildet ein farbloses 01 vom  KP = 139 - 141' unter 11     mm    Druck;  es soll als Zwischenprodukt in der Farbstoff  und     Riechstoffabrikation        Verwendung    fin  den.  



  <I>Beispiel:</I>  792 Teile     Tetralin    werden in     75'0    Teile  wässerige     Formaldehydlösung    (30%ig) und    3000 Teile konzentrierte Chlorwasserstoff  säure eingetragen, worauf das Gemisch unter  Rühren und Einleiten von Chlorwasserstoff  auf 60 bis 65   erwärmt wird. Nach meh  reren Stunden trennt man das 01 von der  Salzsäure, wäscht es     neutral,    trocknet und  destilliert im Vakuum. Man erhält 70?  Teile     6'-Chlor-6-methylnaphtalintetrahydrid-          1.    2. 3. 4 vom KP. 139 - 141   unter  11 mm Druck. Für     technisch,-    Zwecke lässt  sich     selbstverständlich    dis erhaltene Rohöl  direkt verwenden.



  Process for the preparation of 6'-chloro-6-ynethylriaplitalin tetralihydride-1. 2.3 .4. According to the invention, 6'-chloro-6-methylnaphthalene tetrahydride-1 is obtained. 2. 3. 4, when treating 1.2.3.4-tetrahydronaphthalene with formaldehyde and concentrated hydrochloric acid. In order to maintain a sufficient concentration of the acid, it is expedient to introduce gaseous hydrogen chloride during the reaction, which proceeds with stirring and careful heating.



  The 6'-chloro-6-methylnaphthalene-tetrahydride-1.2.3.4 forms a colorless oil of KP = 139 - 141 'under 11 mm pressure; it is intended to be used as an intermediate in the manufacture of dyes and fragrances.



  <I> Example: </I> 792 parts of tetralin are introduced into 75'0 parts of aqueous formaldehyde solution (30%) and 3000 parts of concentrated hydrochloric acid, whereupon the mixture is heated to 60 to 65 while stirring and passing in hydrogen chloride. After several hours, the oil is separated from the hydrochloric acid, washed neutral, dried and distilled in vacuo. You get 70? Parts of 6'-chloro-6-methylnaphthalene tetrahydride-1. 2. 3. 4 from KP. 139 - 141 under 11 mm pressure. For technical purposes, the obtained crude oil can of course be used directly.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 6'-Clilor- 6-methylnaphtalintetrahydrid-1.2.3.4, da durch gekennzeichnet, dass man 1.2.3.4- Tetrahydronaphtalin unter Erwärmen mit Formaldehyd und konzentrierter Chlorwas- serstoffsäure behandelt. Das 6'-Chlor=6-methylnaphtalintetrahy- drid-1 .2.3.4 bildet ein farbloses Öl vom KP. = 139 - 141 unter 11 mm Druck. PATENT CLAIM: Process for the preparation of 6'-Clilor-6-methylnaphthalene-tetrahydride-1.2.3.4, characterized in that 1.2.3.4-tetrahydronaphthalene is treated while warming with formaldehyde and concentrated hydrochloric acid. The 6'-chlorine = 6-methylnaphthalene tetrahydride-1 .2.3.4 forms a colorless oil from KP. = 139 - 141 under 11 mm pressure. UNTERANSPRUCH: Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass die Reaktion unter Ein- leiten von gasförmigem Chlorwasserstoff er folgt. SUBCLAIM: Method according to claim, characterized in that the reaction takes place with the introduction of gaseous hydrogen chloride.
CH149697D 1929-07-29 1930-07-08 Process for the preparation of 6'-chloro-6-methylnaphthalene tetrahydride-1.2.3.4. CH149697A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE149697X 1929-07-29

Publications (1)

Publication Number Publication Date
CH149697A true CH149697A (en) 1931-09-30

Family

ID=5673483

Family Applications (1)

Application Number Title Priority Date Filing Date
CH149697D CH149697A (en) 1929-07-29 1930-07-08 Process for the preparation of 6'-chloro-6-methylnaphthalene tetrahydride-1.2.3.4.

Country Status (1)

Country Link
CH (1) CH149697A (en)

Similar Documents

Publication Publication Date Title
CH149697A (en) Process for the preparation of 6&#39;-chloro-6-methylnaphthalene tetrahydride-1.2.3.4.
DE413380C (en) Process for the preparation of pure 1-nitro-2-methylanthraquinone
DE887342C (en) Process for the preparation of cycloaliphatic ketones
CH159030A (en) Process for the production of an ammonium salt.
CH151556A (en) Process for the preparation of 6&#39;-chloro-6-methylnaphthalene-tetrahydride-1.2.3.4.
CH193615A (en) Process for the production of a new betaine derivative.
CH159031A (en) Process for the production of an ammonium salt.
CH159149A (en) Process for the preparation of 2-phenyl-a-naphthindole-8-sulfonic acid.
CH156411A (en) Process for the production of an ammonium salt.
CH155313A (en) Process for the preparation of a conversion product of hard paraffin.
CH121705A (en) Process for the preparation of a diarylamine.
CH155318A (en) Process for the preparation of a conversion product of hard paraffin.
CH159033A (en) Process for the production of an ammonium salt.
CH149429A (en) Process for producing a synthetic resin.
CH182592A (en) Process for the preparation of an amine oxide.
CH135635A (en) Process for the preparation of an arylaminonaphthalene derivative.
CH181156A (en) Process for the production of a new textile auxiliary.
CH187013A (en) Process for the preparation of a cyclic ketone.
CH165506A (en) Process for the preparation of a higher molecular weight sulfur compound.
CH149011A (en) Process for the preparation of an N-substituted compound of the pyridone series.
CH186728A (en) Process for the production of a preparation suitable for the production of matting baths.
CH191847A (en) Process for the preparation of ethyleneimine.
CH181157A (en) Process for the production of a new textile auxiliary.
CH179442A (en) Process for the production of a new textile auxiliary.
CH158437A (en) Process for the preparation of a new sulfur-containing derivative of a higher aliphatic hydrocarbon.