CH254996A - Process for the production of reductic acid. - Google Patents

Process for the production of reductic acid.

Info

Publication number
CH254996A
CH254996A CH254996DA CH254996A CH 254996 A CH254996 A CH 254996A CH 254996D A CH254996D A CH 254996DA CH 254996 A CH254996 A CH 254996A
Authority
CH
Switzerland
Prior art keywords
production
reductic acid
reductic
acid
hydrolysis
Prior art date
Application number
Other languages
German (de)
Inventor
Industrieele Maats Koninklijke
Original Assignee
Koninkl Ind Mij Voorheen Noury
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 Koninkl Ind Mij Voorheen Noury filed Critical Koninkl Ind Mij Voorheen Noury
Publication of CH254996A publication Critical patent/CH254996A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/64—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of functional groups containing oxygen only in singly bound form

Description

  

  Verfahren zur Herstellung von     Reduktinsäure.       Das Hauptpatent betrifft ein Verfahren  zur Herstellung von     Reduktinsäure,    welches  dadurch     gekennzeichnet    ist, dass man     3-Ha-          logen-cyklopenten-(2)-ol-(2)-on-(1)        hydroly-          #iert.     



  Es wurde dort vorgesehen, die     Hydro-          lyc=    mit Hilfe eines schwach alkalischen       Stoffes    auszuführen.  



  Es wurde nun gefunden, dass man     eine          bührre    Ausbeute bei einer genügend grossen       113-drolysegeschwindigkeit    dadurch     erhal-          1en    kann, dass man das Ausgangsmaterial bei       einer        Temperatur    über 100  C mit Wasser       oder        'Wasserdampf    erhitzt.

           Beispiel   <I>1:</I>    In einem geschlossenen Gefäss wird 1     Ge-          uicht#teil        3-Brom-ayklopenten-    (2)     -o1-        (2)-          on-(l)        in,einer    Stickstoffatmosphäre mit 15       (1r(-wicht    teilen ausgekochten Wassers wäh  rend einer     Stunde    auf     140"C    erhitzt.

   Aus       einer        Titration    der gelbbraunen Flüssigkeit       riiii:        Jodlösung    geht hervor, dass die Brom  verbindung sich quantitativ in     R.eduktinsäure          umgewandelt    hat. Man kann die     Isolierung     derselben z.     B.    dadurch vornehmen, dass man    die warme Lösung mit     Norit    entfärbt (bei  200  C     ausgedämpft)    und im Vakuum zu  einem kleinen Volumen einengt.     HieTbei          kristallisiert    die     Reduktinsäure    aus.

      <I>Beispiel 2:</I>    In einem geschlossenen Gefäss wird 1     Ge-          wichtisteil        3-Chlor-cyklo@penten-(2)-of-(2)-on-          (1)    in einer Stickstoffatmosphäre mit 15 Ge  wichtsteilen     ausgekochten    Wassers während  11/2 Stunde auf 150-155  C (oder 3 Stunden  auf 140  C) erhitzt. Die Farbe der Lösung     ist          etwas    heller als bei der Hydrolyse der  Bromverbindung. Die Ausbeute beträgt nach       Titra,tion    ungefähr 95 %. Die Isolierung kann  wie in Beispiel 1 beschrieben stattfinden.



  Process for the production of reductic acid. The main patent relates to a process for the production of reductic acid, which is characterized in that 3-halo-cyclopentene- (2) -ol- (2) -one- (1) is hydrolyzed.



  It was planned there to carry out the Hydrolyc = with the help of a weakly alkaline substance.



  It has now been found that a poor yield can be obtained at a sufficiently high rate of drolysis by heating the starting material with water or steam at a temperature above 100.degree.

           Example <I> 1: </I> 1 portion of 3-bromo-ayklopenten- (2) -o1- (2) -on- (l) in a nitrogen atmosphere with 15 (1r (-weight parts of boiled water heated to 140 ° C for one hour.

   A titration of the yellow-brown liquid riiii: iodine solution shows that the bromine compound has been converted quantitatively into reduced reductic acid. You can isolate the same z. B. can be done by decolorizing the warm solution with Norit (steamed out at 200 C) and concentrating in a vacuum to a small volume. The reductic acid crystallizes out.

      <I> Example 2: </I> 1 part by weight of 3-chloro-cyklo @ penten- (2) -of- (2) -on- (1) is boiled in a nitrogen atmosphere with 15 parts by weight Water heated to 150-155 ° C. (or 3 hours at 140 ° C.) for 11/2 hours. The color of the solution is slightly lighter than when the bromine compound was hydrolyzed. The yield after titration is approximately 95%. The isolation can take place as described in Example 1.

Claims (1)

PATENTANSPRUCH: Verfahren zur HeTStellung von Reduktin- sä.ure durch Hydrolyse von 3-Halogen-cyklo- penten-(2)-01-(2)-on-(1), dadurch gekenn zeichnet, dass man die Hydrolyse durch Er hitzen des. Ausgangsmaterials mit Wasser oder Wasserdampf bei einer Temperatur über 100 C ausführt. PATENT CLAIM: Process for the production of reductic acid by hydrolysis of 3-halo-cyclopentene- (2) -01- (2) -one- (1), characterized in that the hydrolysis is carried out by heating the Performs starting material with water or steam at a temperature above 100 ° C.
CH254996D 1943-03-25 1943-05-04 Process for the production of reductic acid. CH254996A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL254996X 1943-03-25
CH245669T 1943-05-04

Publications (1)

Publication Number Publication Date
CH254996A true CH254996A (en) 1948-05-31

Family

ID=25729068

Family Applications (1)

Application Number Title Priority Date Filing Date
CH254996D CH254996A (en) 1943-03-25 1943-05-04 Process for the production of reductic acid.

Country Status (1)

Country Link
CH (1) CH254996A (en)

Similar Documents

Publication Publication Date Title
GB1022923A (en) Polypyrrolidone solutions
CH254996A (en) Process for the production of reductic acid.
DE872043C (en) Process for the production of reductic acid
GB591027A (en) 11-amino-undecyclic acid and its method of preparation
GB376323A (en) Improvements in or relating to the manufacture of dextrins, sugars and other products from cellulosic materials
GB957985A (en) Process for the preparation of 2:5-furandicarboxylic acid
DE528677C (en) Process for the production of potassium nitrate by reacting potassium chloride with nitrates
AT85977B (en) Process for the production of an iron preparation.
GB590949A (en) Process for the production of treacle from beet molasses
DE845348C (en) Process for the production of aminoacetals
DE637258C (en) Process for the production of ascorbic acid
AT219588B (en) Process for the production of acetylsalicylic acid
CH234588A (en) Process for the production of nicotinic acid.
DE835441C (en) Process for the production of xanthine
GB435721A (en) Improvements in process for preparing metol
CH251025A (en) Process for the preparation of B-picolyl nicotinate.
DE592199C (en) Process for the preparation of 8-oxyquinoline and its 5-sulfonic acid
CH120257A (en) Process for the preparation of a new oxynaphthalene carboxylic acid.
GB841293A (en) Process for the manufacture of water-soluble aluminium salts
GB470468A (en) Improvements in the manufacture and production of ureas from alpha-omega-diaminocarboxylic acids
GB918284A (en) Process for the production of difluorophthalic acids
DE1035146B (en) Process for the preparation of chloractinomycins
CH235719A (en) Process for the preparation of a salt of N1-dimethylacroyl-p-aminobenzenesulfonamide.
GB854999A (en) A process for the production of itaconic anhydride
GB494490A (en) Process of manufacturing aluminium sulphate from kaolin