DE521620C - Process for the preparation of menthol, its isomers and the corresponding ketones - Google Patents
Process for the preparation of menthol, its isomers and the corresponding ketonesInfo
- Publication number
- DE521620C DE521620C DEC40351D DEC0040351D DE521620C DE 521620 C DE521620 C DE 521620C DE C40351 D DEC40351 D DE C40351D DE C0040351 D DEC0040351 D DE C0040351D DE 521620 C DE521620 C DE 521620C
- Authority
- DE
- Germany
- Prior art keywords
- isomers
- menthol
- preparation
- corresponding ketones
- hydrogen
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C35/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring
- C07C35/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic
- C07C35/08—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic containing a six-membered rings
- C07C35/12—Menthol
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
Verfahren zur Darstellung von Menthol, seinen Isomeren und den entsprechenden Ketonen In dein Patent 5o6 044 ist ein Verfahren zur Darstellung von Menthol bzw. seinen Isomeren und Homologen und den entsprechenden Ketonen beschrieben, das darin besteht, daß die nach dem Patent 486 768 aus m- oder p-Kresol und Ketonen erhältlichen Kondensationsprodukte in Gegenwart von Katalysatoren mit Wasserstoff bis zur Aufnahme von 16 bzw. 14 Atomen Wasserstoff behandelt werden. Es wurde gefunden, daß in derselben Weise auch aus den ätherartigen Kondensationsprodukten, wie sie von G a e -b e 1 in seiner Dissertation: »Über Kondensationsprodukte aus m-Kresol und p-Kresol mit Aceton (Marburg 19o3)« beschrieben werden, Thvinol und seine Isorneren und die Homologen bzw. die entsprechenden Ketone gewonnen werden können.Process for the preparation of menthol, its isomers and the corresponding Ketones In your patent 5o6 044 a process for the preparation of menthol resp. its isomers and homologues and the corresponding ketones described therein consists that the patent 486 768 available from m- or p-cresol and ketones Condensation products in the presence of catalysts with hydrogen until uptake of 16 or 14 atoms of hydrogen are treated. It was found that in the same Wise also from the ethereal condensation products, as described by G a e -b e 1 in his dissertation: »On condensation products from m-cresol and p-cresol with Aceton (Marburg 19o3) «, thvinol and its isomers and the homologues or the corresponding ketones can be obtained.
Beispiel i Das ätherartige Kondensationsprodukt aus in-Kresol und Aceton wird bei 25o° bis 28o° in Gegenwart eines Hydrierungskatalysators mit Nickel als Basis der Einwirkung von Wasserstoff bei 3o Atm. Druck unterworfen. Läßt man die Wasserstoffaufnahme bis zu 16 Atomen Wasserstoff gehen, so erhält man ein Gemisch der verschiedenen stereoisomeren Menthole.Example i The ethereal condensation product of in-cresol and Acetone is at 25o ° to 28o ° in the presence of a hydrogenation catalyst with nickel as the basis of the action of hydrogen at 3o atm. Subjected to pressure. One lets If the hydrogen uptake goes up to 16 atoms of hydrogen, a mixture is obtained of the various stereoisomeric mentholes.
Beispiel e Das ätherartige Kondensationsprodukt aus p-Kresol und Aceton wird wie in Beispiel i behandelt. Man erhält ein Gemenge der verschiedenen stereoisomeren 4-Methyl-2-isopropylcvclohexanole.Example e The ethereal condensation product of p-cresol and acetone is treated as in example i. A mixture of the various stereoisomers is obtained 4-methyl-2-isopropylclohexanols.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC40351D DE521620C (en) | 1927-08-30 | 1927-08-30 | Process for the preparation of menthol, its isomers and the corresponding ketones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC40351D DE521620C (en) | 1927-08-30 | 1927-08-30 | Process for the preparation of menthol, its isomers and the corresponding ketones |
Publications (1)
Publication Number | Publication Date |
---|---|
DE521620C true DE521620C (en) | 1931-03-27 |
Family
ID=7024138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC40351D Expired DE521620C (en) | 1927-08-30 | 1927-08-30 | Process for the preparation of menthol, its isomers and the corresponding ketones |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE521620C (en) |
-
1927
- 1927-08-30 DE DEC40351D patent/DE521620C/en not_active Expired
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