CH126718A - Process for the preparation of 1,5-dichloro-2,6-dimethylnaphthalene. - Google Patents

Process for the preparation of 1,5-dichloro-2,6-dimethylnaphthalene.

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Publication number
CH126718A
CH126718A CH126718DA CH126718A CH 126718 A CH126718 A CH 126718A CH 126718D A CH126718D A CH 126718DA CH 126718 A CH126718 A CH 126718A
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CH
Switzerland
Prior art keywords
dimethylnaphthalene
dichloro
preparation
heated
sulfuryl chloride
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 CH126718A publication Critical patent/CH126718A/en

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Description

  

  Verfahren zur Darstellung von     1.6-Dichlor-2.6-dimethylnaphtalin.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung von     1.5-Dichlor-          2.        6-dimethylnaphtalin.     



  Das Verfahren ist dadurch gekennzeichnet,  dass man auf 1     Mol.        2.6-Dimethylnaphtalin     2     Mol.        Sulfurylchlorid    bei mässiger Tempe  ratur einwirken lässt. Es kann ohne Lösungs  mittel oder auch mit     indifferenten        Lö8ungs-          mitteln    wie Äther,     Tetrachlormethan    usw.  ausgeführt werden. Die Temperatur wird  vorteilhaft unter 65   gehalten. Das 1.     5-Dichlor-          2.6-Dimethylnaphtalin    soll zur Herstellung  von     Farbstoffen    Verwendung finden.  



  <I>Beispiel</I>  156 Gewichtsteile     2.6-Di-nethylnaphtalin     werden mit 270 Gewichtsteilen     Sulfurylchlorid     gemischt und auf 30-40   erwärmt. 170 Ge  wichtsteile des Endproduktes destillieren  von<B>328-3330</B>     (unkorr.)    und erstarren sofort  in der Vorlage zu weissen Prismen. Aus  Alkohol oder Eisessig umkristallisiert, schmel-         zen    sie scharf bei 130   und stellen einheit  liches     1.5-Dichlor-2.6-Dimethyln        a'phtalin    dar,  das einen angenehmen, schwach aromatischen  Geruch hat.

   In Chloroform ist es sehr leicht  löslich; Äther,     Ligroin,    aromatische Kohlen  wasserstoffe,     Methyl-    und Äthylalkohol, so  wie Eisessig sind geeignete     Kristallisations-          mittel.     



  In konzentrierter Schwefelsäure löst es  sich kalt kaum, beim Erhitzen tritt unter  Dunkelfärbung     Schwefeldioxyd-Entwicklung     und Oxydation ein.



  Process for the preparation of 1,6-dichloro-2,6-dimethylnaphthalene. The subject of this additional patent is a process for the preparation of 1,5-dichloro-2,6-dimethylnaphthalene.



  The process is characterized in that 2 moles of sulfuryl chloride are allowed to act on 1 mole of 2,6-dimethylnaphthalene at a moderate temperature. It can be carried out without solvents or with inert solvents such as ether, carbon tetrachloride, etc. The temperature is advantageously kept below 65. The 1. 5-dichloro-2,6-dimethylnaphthalene is said to be used for the production of dyes.



  <I> Example </I> 156 parts by weight of 2,6-dimethylnaphthalene are mixed with 270 parts by weight of sulfuryl chloride and heated to 30-40. 170 parts by weight of the end product distill <B> 328-3330 </B> (uncorrected) and solidify immediately in the original to form white prisms. Recrystallized from alcohol or glacial acetic acid, they melt sharply at 130 and are uniform 1,5-dichloro-2,6-dimethyln a'phtalin, which has a pleasant, slightly aromatic odor.

   It is very easily soluble in chloroform; Ether, ligroin, aromatic hydrocarbons, methyl and ethyl alcohol and glacial acetic acid are suitable crystallization agents.



  In concentrated sulfuric acid it hardly dissolves when cold; when heated, the development of sulfur dioxide and oxidation occurs with a dark color.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 1. 5-Dichlor- 2.6-Dimethylnaphtalin, dadurch gekennzeich net, dass man auf 1 Mol. 2.6-Dimethylnaph- talin 2 Mol. Sulfurylchlorid bei mässigen Tem peraturen einwirken lässt. Das 1.5-Dichlor-2.6-Dimethylnaphtalin kristallisiert in weissen Prismen und schmilzt scharf bei 130 ; es hat einen angenehmen, schwach aromatischen Geruch. In Chloroform ist es sehr leicht löslich, in konzentrierter Schwefelsäure löst es sich- kalt kaum; beim Erhitzen tritt unter Dunkelfärbung Schwefel dioxyd-Entwicklung und Oxydation ein. PATENT CLAIM: Process for the preparation of 1,5-dichloro-2,6-dimethylnaphthalene, characterized in that 2 moles of sulfuryl chloride are allowed to act on 1 mole of 2,6-dimethylnaphthalene at moderate temperatures. The 1,5-dichloro-2,6-dimethylnaphthalene crystallizes in white prisms and melts sharply at 130; it has a pleasant, slightly aromatic odor. In chloroform it is very easily soluble, in concentrated sulfuric acid it hardly dissolves cold; When heated, the development of sulfur dioxide and oxidation occurs with a dark color.
CH126718D 1925-12-29 1926-12-27 Process for the preparation of 1,5-dichloro-2,6-dimethylnaphthalene. CH126718A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE126718X 1925-12-29
CH125470T 1926-12-27

Publications (1)

Publication Number Publication Date
CH126718A true CH126718A (en) 1928-07-02

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ID=25710465

Family Applications (1)

Application Number Title Priority Date Filing Date
CH126718D CH126718A (en) 1925-12-29 1926-12-27 Process for the preparation of 1,5-dichloro-2,6-dimethylnaphthalene.

Country Status (1)

Country Link
CH (1) CH126718A (en)

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