CH210968A - Process for the preparation of a urea derivative. - Google Patents

Process for the preparation of a urea derivative.

Info

Publication number
CH210968A
CH210968A CH210968DA CH210968A CH 210968 A CH210968 A CH 210968A CH 210968D A CH210968D A CH 210968DA CH 210968 A CH210968 A CH 210968A
Authority
CH
Switzerland
Prior art keywords
urea derivative
preparation
water
phosgene
dichloro
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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
Priority claimed from CH536047X external-priority
Application filed by Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH210968A publication Critical patent/CH210968A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01Sulfonic acids
    • C07C309/28Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C309/41Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing singly-bound oxygen atoms bound to the carbon skeleton
    • C07C309/42Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing singly-bound oxygen atoms bound to the carbon skeleton having the sulfo groups bound to carbon atoms of non-condensed six-membered aromatic rings

Description

  

  Verfahren zur Darstellung eines     Harnstoffderivates.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines Harn  stoffderivates der Formel  
EMI0001.0002     
    dadurch gekennzeichnet, dass man     2-Amino-          4,4'-dichlor-1,1'-diphenyläther-2'-sulfonsäure     mit     Phosgen    umsetzt. Das neue Harnstoff  derivat bildet als     Natriumsalz    ein weisses,  gut wasserlösliches Pulver, das sich zur Ver  wendung als Mottenschutzmittel eignet.

           Beispiel:       17,8 Teile     2-Amino-4,4'-dichlor-1,1'-di-          phenyläther-2'-sulfonsäure    werden in 200 Tei  len Wasser mit der nötigen Menge 10     o/oiger          Sodalösung    in Lösung gebracht. Dazu gibt  man 30 Teile kristallisiertes     Natriumacetat     hinzu und leitet bei 40-50' C     Phosgen    ein,  bis eine Probe kein freies Amin mehr anzeigt.  Das abgeschiedene Produkt wird mit     Soda       genau neutralisiert und das     Natriumsalz    des  neuen     Harnstoffderivates    durch Zusatz von  gesättigter Kochsalzlösung abgeschieden.

   Es  wird nach dem Abtrennen, Trocknen und  Mahlen als weisses, schön kristallines, gut  wasserlösliches Pulver erhalten. Die Aus  beute ist quantitativ.



  Process for the preparation of a urea derivative. The subject of the present patent is a process for the preparation of a urea derivative of the formula
EMI0001.0002
    characterized in that 2-amino-4,4'-dichloro-1,1'-diphenyl ether-2'-sulfonic acid is reacted with phosgene. As a sodium salt, the new urea derivative forms a white, water-soluble powder that is suitable for use as a moth repellent.

           Example: 17.8 parts of 2-amino-4,4'-dichloro-1,1'-diphenyl ether-2'-sulfonic acid are dissolved in 200 parts of water with the necessary amount of 10% soda solution. To this end, 30 parts of crystallized sodium acetate are added and phosgene is passed in at 40-50 ° C. until a sample no longer shows any free amine. The deposited product is precisely neutralized with soda and the sodium salt of the new urea derivative is deposited by adding saturated saline solution.

   After separating, drying and grinding it is obtained as a white, nicely crystalline, water-soluble powder. The yield is quantitative.

 

Claims (1)

PATENTANSPRUCH: , Verfahren zur Herstellung eines Harn stoffderivates der Formel EMI0001.0017 dadurch gekennzeichnet, dass man 2-Amino- 4,4'-dichlor-1,1'-diphenyläther- 2'- sulfonsäure mit Phosgen umsetzt. Das neue Harnstoff derivat bildet als Natriumsalz ein weisses, gut wasserlösliches Pulver, das sich zur Ver wendung als Mottenschutzmittel eignet. PATENT CLAIM: Process for the production of a urea derivative of the formula EMI0001.0017 characterized in that 2-amino-4,4'-dichloro-1,1'-diphenyl ether-2'-sulfonic acid is reacted with phosgene. As a sodium salt, the new urea derivative forms a white, water-soluble powder that is suitable for use as a moth repellent.
CH210968D 1938-06-16 1938-06-16 Process for the preparation of a urea derivative. CH210968A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH536047X 1938-06-16
CH210968T 1938-06-16

Publications (1)

Publication Number Publication Date
CH210968A true CH210968A (en) 1940-08-15

Family

ID=25724957

Family Applications (1)

Application Number Title Priority Date Filing Date
CH210968D CH210968A (en) 1938-06-16 1938-06-16 Process for the preparation of a urea derivative.

Country Status (1)

Country Link
CH (1) CH210968A (en)

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