CH228930A - Process for the preparation of a compound of the tetrahydropyran series. - Google Patents

Process for the preparation of a compound of the tetrahydropyran series.

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Publication number
CH228930A
CH228930A CH228930DA CH228930A CH 228930 A CH228930 A CH 228930A CH 228930D A CH228930D A CH 228930DA CH 228930 A CH228930 A CH 228930A
Authority
CH
Switzerland
Prior art keywords
series
tetrahydropyran
compound
preparation
ortetrahydropyran
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 CH228930A publication Critical patent/CH228930A/en

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  • Pyrane Compounds (AREA)

Description

  

  .Verfahren zur     Herstellung    einer     Verbindung    der     Tetrahydropyranr        eihe.       Es wurde     geùnden,        da.ss    man zu     wertvol-          len,    neuen Verbindungen der     Tetrahydropyran-          reihe    gelangt,     wenn    man     3-Halogen-:dihydro-          pyrane,    die aus     DihydropyrandurchHalo:gen-          anlagerung        und:

          Abspaltung    von     Halogenwal-          serstoff        leicht    erhältlich sind, durch: Anlage  rung von Halogen in die     2-Halog,en-3.3-          dihalagentetrahydropyrane    übergeführt und    diese mit     Verbindungen    der     allgemeinen     Formel         worin    X     .Sauerstoff,    R     Wascierstoff,        Alkyl,          Cyzln.alkyl,        Aralkyl,        A.ryl    oder     Acyl    bedeu  tet,

       bezw.    deren     Metallverbindungen    um  setzt. Die Reaktion     sei        am    Hand des     folgen-          ,den        Formelschemas        erläutert:

       
EMI0001.0041     
    Die so erhaltenen     halogenhaltigen    Alko  hole, Äther und     Ester    der     Tetrahydropyran-          reihe        sind    neue, bisher im     Schrifttum    nicht    beschriebene     Verbindungen,    die einer man  nigfa,chen     Verwendung    zugeführt werden       können,        insbesondere        sind    sie     als    Weich-           ma,cher    für :die verschiedensten thermopla  stischen     ho.chmel@ekularen    Verbindungen ge  eignet.  



  Vorliegendes     Patent    bezieht sich nun auf  ein     Verfahren    zur     Herstellung    einer     Verbsn-          dung    der     Tetrahydropyranreihe,    dadurch     ge-          kennzeilchnet,    JA man an     3-Chlordihydro.-          pyran    Chlor     anlagert    und das so erhaltene       2-Chlor-3.3-dichlortetrahydrapyran    mit Was  ser umsetzt.  



  Das so erhaltene     2-Oxy-3.3-:diichlortetra-          hyd.ropyran        kristallisiert    aus Benzol in farb  losen Blättchen vom     Schmelzpunkt    89 bis  90 . Es siedet bei 15 mm Druck bei 122 bis       124 .    Es     soll        als        Weichmacher    für thermo  plastische     hochmolekulare        Verhindungen    Ver  wendung finden.  



  <I>Beispiel:</I>  In 119 Teile     3-Chlordihydropyran    (farb  lose     Flüssigkeit    vom Kp. 141 , erhältlich  durch Abspaltung von     Chlorwasserstoff    aus       2,3@-.Dichlortetrahydro@p:yran)    wird bei etwa  0-10  Chlor eingeleitet, bis die Gewichts  zunahme 71     Teilen    entspricht; durch an  schliessende     Vakuumdestillation    erhält man       .das        2-Chlor-3.3adichlortetrahyd@ropyran    als  farblose     Flüssigkeit    vom     gp        S        ",.    95-97 .

      190 Teile des so erhaltenen     2-Chl:or-3.3-          dichlortetrahydropy    ran "erden mit etwa  750 Teilen Wasser 24     Stunden    bei gewöhn  licher Temperatur auf einer Schüttelmaschine  geschüttelt. Das sich in farblosen     Kristallen     abscheidende     Reaktionsprodukt,        vermutlich     das     2-Oxy-3.3-dichlortetrahydropyran,    wird       abgesaugt,        .ausgewaschen        und    im Vakuum  bei etwa 50-G0  getrocknet.



  .Process for the production of a compound of the tetrahydropyran series. It was found that valuable, new compounds of the tetrahydropyran series can be obtained if 3-halo: dihydropyrans, which are obtained from dihydropyran by halo: gene addition and:

          Cleavage of hydrogen halide can easily be obtained by: planting halogen into the 2-halo, ene-3.3-dihalage tetrahydropyrans and converting these with compounds of the general formula in which X is oxygen, R is detergent, alkyl, cycloalkyl, aralkyl, A.ryl or acyl means

       respectively their metal compounds. The reaction is explained using the following formula scheme:

       
EMI0001.0041
    The halogen-containing alcohols, ethers and esters of the tetrahydropyran series obtained in this way are new compounds, not previously described in literature, which can be put to a limited use, in particular they are used as plasticizers for a wide variety of thermoplastics ho.chmel@ekularen connections.



  The present patent relates to a process for the production of a compound of the tetrahydropyran series, characterized by the fact that chlorine is added to 3-chlorodihydro.pyran and the 2-chloro-3,3-dichlorotetrahydrapyran thus obtained is reacted with water.



  The 2-oxy-3.3-: diichlorotetrahyd.ropyran thus obtained crystallizes from benzene in colorless flakes with a melting point of 89 to 90. It boils at 122 to 124 at 15 mm pressure. It is said to be used as a plasticizer for thermoplastic high molecular weight compounds.



  <I> Example: </I> In 119 parts of 3-chlorodihydropyran (colorless liquid of bp 141, obtainable by splitting off hydrogen chloride from 2,3 @ -. Dichlorotetrahydro @ p: yran), chlorine is introduced at about 0-10 until the weight gain equals 71 parts; subsequent vacuum distillation gives .das 2-Chlor-3.3adichlortetrahyd@ropyran as a colorless liquid of gp S ",. 95-97.

      190 parts of the 2-chloro-3.3-dichlorotetrahydropyran obtained in this way are shaken with about 750 parts of water for 24 hours at the usual temperature on a shaking machine. The reaction product separating out in colorless crystals, presumably 2-oxy-3.3-dichlorotetrahydropyran , is sucked off, washed out and dried in a vacuum at about 50-G0.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer Verbin dung der Tetrabydropyranre.ihe, dadurch ge kennzeichnet, da.ss man an 3-Chlordihydro- pyran Chlor anlagert und das so erhaltene 2-Chlor-3.3-dichl,ortetrahydropy ran mit Was ser umsetzt. Das so erhaltene 2-Oxy-3.3-dichl.ortetra- hydropyran kristallisiert aus Benzol in farb- loaen Blättchen vom Schmelzpunkt 89-90 ; es .siedet bei 15 mm Drueh bei 1.22-124 . PATENT CLAIM: A process for producing a compound of the tetrabydropyran series, characterized in that chlorine is added to 3-chlorodihydropyran and the 2-chloro-3.3-dichloro, ortetrahydropyran thus obtained is reacted with water. The 2-oxy-3.3-dichl.ortetrahydropyran obtained in this way crystallizes from benzene in colorless flakes with a melting point of 89-90; it boils at 1.22-124 at 15 mm pressure. <B>Es</B> soll a.ls Weichmacher für thermoplastische hochmolekulare Verbindungen Verwendung finden. <B> It </B> should be used as a plasticizer for thermoplastic high-molecular compounds.
CH228930D 1941-06-17 1942-05-26 Process for the preparation of a compound of the tetrahydropyran series. CH228930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE228930X 1941-06-17

Publications (1)

Publication Number Publication Date
CH228930A true CH228930A (en) 1943-09-30

Family

ID=5867495

Family Applications (1)

Application Number Title Priority Date Filing Date
CH228930D CH228930A (en) 1941-06-17 1942-05-26 Process for the preparation of a compound of the tetrahydropyran series.

Country Status (1)

Country Link
CH (1) CH228930A (en)

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