CH145307A - Process for the preparation of a derivative of cyclohexylbenzene. - Google Patents
Process for the preparation of a derivative of cyclohexylbenzene.Info
- Publication number
- CH145307A CH145307A CH145307DA CH145307A CH 145307 A CH145307 A CH 145307A CH 145307D A CH145307D A CH 145307DA CH 145307 A CH145307 A CH 145307A
- Authority
- CH
- Switzerland
- Prior art keywords
- amino
- derivative
- preparation
- cyclohexylbenzene
- pressure
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines Abkömmlings des Cyklohexylbenzols. <I>Beispiel 1:</I> 30 kg des dreikernigen Kondensationspro- duktes aus o-Toluidin und Cyklohexanon (Schweizer Patent Nr. 13.8193) werden mit 10 kg wasserfreiem Chlorzink unter vermin dertem Druck erhitzt. Bei 12 mm und einer Aussentemperatur von etwa 180-250' er hält man 18 kg Destillat.
Der Rückstand wird mit heisser verdünnter Salzsäure in Lö sung gebracht, die Base mit überschüssiger Lauge abgeschieden und mit einem organi schen Lösungsmittel ausgeschüttelt. Nach dem Abdestillieren des Lösungsmittels wird das bei der Reaktion erhaltene Destillat mit dem Extraktionsrückstand vereinigt und das Ganze im Vakuum fraktioniert. Als zweite Fraktion geht das in vorzüglicher Ausbeute entstandene 4-Amino-3-methyl-tetrahydro- diphenyl über, das über das schwer lösliche salzsaure Salz gereinigt werden kann.
30 kg des so erhaltenen 4 - Amino - 3 - methyl-tetrahydrodiphenyl werden mit 1 kg eines Nickel enthaltenden Katalysators unter einem Druck von 30-80 Atmosphären mit Wasserstoff erhitzt. Die Aufnahme vollzieht sich in kurzer Zeit bei 60-80 . Bei der Aufarbeitung erhält man das bisher noch nicht beschriebene 4-Amino-3-methyl-hexa- hydrodiphenyl als ein wasserhelles 01.
<I>Beispiel 2:</I> 50 kg 4.4'-Diamino-3.3'-dimethyl-di- phenyl-1.1'-cyklohexan werden mit 50 kg Dekahydronaphthalin und 2,5 kg eines aus Nickel, Kobalt, Kupfer und Wismut be stehenden, in Form der Karbonate auf aktiver Kieselsäure niedergeschlagenen und in üblicher Weise in Wasserstoffatmosphäre reduzierten Katalysators unter 60 Atmo sphären Wasserstoffdruck und gutem Rühren auf 180 erhitzt. Die Wasserstoffaufnahme verläuft ziemlich rasch und wird nach Ein führung der berechneten Menge abgebrochen. Durch fraktionierte Destillation im Vakuum erhält man, nach Übergehung z: eines Vor laufes, ein unter 13 mm Druck bei 1168 bis <B>170'</B> siedendes farbloses 01.
Das mit nahe zu theoretischer Ausbute entstandene Pro- dukt ist identisch mit dem im Beispiel 1 be schriebenen 4-Amino - 3 - methyl - hexahydro- diphenyl.
Process for the preparation of a derivative of cyclohexylbenzene. Example 1: 30 kg of the trinuclear condensation product made from o-toluidine and cyclohexanone (Swiss patent no. 13.8193) are heated with 10 kg of anhydrous zinc chloride under reduced pressure. At 12 mm and an outside temperature of around 180-250 'he holds 18 kg of distillate.
The residue is brought into solution with hot, dilute hydrochloric acid, the base is separated off with excess alkali and extracted with an organic solvent. After the solvent has been distilled off, the distillate obtained in the reaction is combined with the extraction residue and the whole is fractionated in vacuo. The 4-amino-3-methyl-tetrahydrophenyl which is produced in excellent yield and which can be purified using the sparingly soluble hydrochloric acid salt passes over as the second fraction.
30 kg of the 4 - amino - 3 - methyl-tetrahydrodiphenyl obtained in this way are heated with 1 kg of a nickel-containing catalyst under a pressure of 30-80 atmospheres with hydrogen. The uptake takes place in a short time at 60-80. When working up, 4-amino-3-methyl-hexa-hydrodiphenyl, which has not yet been described, is obtained as a water-white oil.
<I> Example 2: </I> 50 kg of 4.4'-diamino-3.3'-dimethyl-diphenyl-1.1'-cyclohexane are mixed with 50 kg of decahydronaphthalene and 2.5 kg of one made from nickel, cobalt, copper and bismuth standing, in the form of the carbonates precipitated on active silica and reduced in the usual way in a hydrogen atmosphere catalyst under 60 atmospheres hydrogen pressure and heated to 180 with thorough stirring. The uptake of hydrogen is quite rapid and is canceled after the calculated amount is introduced. Fractional distillation in vacuo gives, after bypassing a forerunner, a colorless oil boiling under 13 mm pressure at 1168 to 170 '.
The product obtained with almost theoretical yield is identical to the 4-amino-3-methyl-hexahydrophenyl described in Example 1.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145307X | 1928-04-30 | ||
CH143386T | 1929-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145307A true CH145307A (en) | 1931-02-15 |
Family
ID=25714261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145307D CH145307A (en) | 1928-04-30 | 1929-04-26 | Process for the preparation of a derivative of cyclohexylbenzene. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH145307A (en) |
-
1929
- 1929-04-26 CH CH145307D patent/CH145307A/en unknown
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2182242A (en) | Process for hydrogenating aromatic hydrocarbons | |
CH443275A (en) | Process for the catalytic mixed oligomerization of unsaturated compounds with the use of diolefins | |
DE907294C (en) | Process for the preparation of compounds of the diamino-dicyclohexylmethane series | |
CH145307A (en) | Process for the preparation of a derivative of cyclohexylbenzene. | |
DE1006856B (en) | Process for the preparation of monomethylaluminum dihalides | |
DE1905922A1 (en) | Process for the isomerization of cyclic aliphatic epoxides with 7 to 10 carbon atoms in the ring | |
DE1493752A1 (en) | Process for the preparation of pure anhydrous 2-amino-propionitrile | |
DE1078108B (en) | Process for the trimerization of 2,3-dimethylbutadiene- (1,3) to an open-chain trimer | |
DE830048C (en) | Process for the preparation of nitrogen-containing compounds | |
DE949233C (en) | Process for the preparation of cyclohexyl-substituted aromatic compounds | |
DE712373C (en) | Process for the production of nitriles | |
DE1060397B (en) | Process for the production of organometallic compounds of nickel | |
DE954958C (en) | Process for rearrangement of ª ‰ -methylene glutaric dinitrile into ª ‰ -methylglutaconic dinitrile | |
DE650430C (en) | Process for the production of diphenyl ether aldehyde | |
DE959459C (en) | Process for the preparation of calcium substitution products of cyclopentadiene and its alkylated, aralkylated and arylated derivatives | |
DE462895C (en) | Process for the production of nerol from geraniol | |
DE870402C (en) | Process for the preparation of cyclohexanone oximes | |
DE932908C (en) | Process for the production of nitrocyclooctane | |
DE940044C (en) | Process for the preparation of anthranyl vinyl ethers | |
DE899193C (en) | Process for the preparation of imidazole derivatives | |
CH206596A (en) | Process for the preparation of a mixture of ring-alkylated aromatic compounds. | |
DE715069C (en) | Process for the production of 1, 1, 2, 3-tetrachloropropane | |
DE1543894C (en) | 2,3-Dimethyl 1-5-tert-butylphenol, its use and process for its preparation | |
AT206420B (en) | Process for the trimerization of 2,3-dimethylbutadiene- (1,3) | |
DE594482C (en) | Process for the preparation of N-alkyl perhydrocarbazoles |