CH87757A - Process for the preparation of methylene camphor. - Google Patents

Process for the preparation of methylene camphor.

Info

Publication number
CH87757A
CH87757A CH87757DA CH87757A CH 87757 A CH87757 A CH 87757A CH 87757D A CH87757D A CH 87757DA CH 87757 A CH87757 A CH 87757A
Authority
CH
Switzerland
Prior art keywords
preparation
camphor
methylene
methylene camphor
sulfuric acid
Prior art date
Application number
Other languages
German (de)
Inventor
Rupe Prof Dr Hans
Kussmaul Dr Walter
Original Assignee
Rupe Prof Dr Hans
Kussmaul Dr Walter
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 Rupe Prof Dr Hans, Kussmaul Dr Walter filed Critical Rupe Prof Dr Hans
Publication of CH87757A publication Critical patent/CH87757A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/587—Unsaturated compounds containing a keto groups being part of a ring
    • C07C49/647—Unsaturated compounds containing a keto groups being part of a ring having unsaturation outside the ring
    • C07C49/653—Unsaturated compounds containing a keto groups being part of a ring having unsaturation outside the ring polycyclic
    • 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
    • C07C45/65—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 splitting-off hydrogen atoms or functional groups; by hydrogenolysis of functional groups
    • C07C45/66—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 splitting-off hydrogen atoms or functional groups; by hydrogenolysis of functional groups by dehydration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung von     Methylencampher.       Der     Methylencampher,    eine Verbindung  von ganz aussergewöhnlicher Reaktionsfähig  keit, war bisher nur ziemlich schwierig und  in unbefriedigender Ausbeute zugänglich, näm  lich durch Erhitzen von     Camphylbrommethan     mit alkoholischem Kali.  
EMI0001.0004     
    <I>Beispiel:</I>  . 100     gr        Camphylcarbinol    werden in 100     gr     Schwefelsäure vom spei.     Gew.    1,675 gelöst  und sodann unter Rühren oder Schütteln auf  dem Wasserbade erwärmt.

   Nach zwei Stun  den giesst man auf Eis und     äthert        aus.    Nach  dem     Abdestillieren    des Äthers wird der     Me-          thylenoampher    unter vermindertem Drucke  destilliert, wobei er in einer     Ausbeute    von       96-98        %        d.        Th.        als        weisse,        wachsartige,        stark          campherartig    riechende Masse vom Schmelz-    Es wurde nun gefunden,

   dass man     Me-          thy        lenc.ampher    direkt aus     Camphylcarbinol     in theoretischer Ausbeute erhält, wenn man       dieses        mit        70-80-%iger        Schwefelsäure        er-          wärmt            punkt        43,5-44     ,     Siedepunkt    10     mm    :     8r84     erhalten wurde.



  Process for the preparation of methylene camphor. The methylene camphor, a compound of extraordinary reactivity, has hitherto only been accessible with great difficulty and in unsatisfactory yield, namely by heating camphyl bromomethane with alcoholic potash.
EMI0001.0004
    <I> Example: </I>. 100 grams of camphylcarbinol are spei in 100 grams of sulfuric acid. Weight 1.675 dissolved and then heated on the water bath with stirring or shaking.

   After two hours, pour onto ice and use ether. After the ether has been distilled off, the methylenoampher is distilled under reduced pressure, with a yield of 96-98% of theory. Th. As a white, waxy, strongly camphor-like smelling mass of enamel. It has now been found

   that one obtains methylene c. amphor directly from camphylcarbinol in theoretical yield when this is obtained with 70-80% sulfuric acid, point 43.5-44, boiling point 10 mm: 8r84.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von Methylen- campher, dadurch gekennzeichnet, dass man Campbylcarbinol mit 70-80-%iger Schwefel- säure erwärmt. PATENT CLAIM: Process for the preparation of methylene camphor, characterized in that campbylcarbinol is heated with 70-80% strength sulfuric acid.
CH87757D 1920-03-11 1920-03-11 Process for the preparation of methylene camphor. CH87757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH87757T 1920-03-11

Publications (1)

Publication Number Publication Date
CH87757A true CH87757A (en) 1921-04-16

Family

ID=4344593

Family Applications (1)

Application Number Title Priority Date Filing Date
CH87757D CH87757A (en) 1920-03-11 1920-03-11 Process for the preparation of methylene camphor.

Country Status (1)

Country Link
CH (1) CH87757A (en)

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