JPS5711968A - Preparation of 2,2,4-trimethyl-1,2-dihydroquinoline - Google Patents
Preparation of 2,2,4-trimethyl-1,2-dihydroquinolineInfo
- Publication number
- JPS5711968A JPS5711968A JP8735380A JP8735380A JPS5711968A JP S5711968 A JPS5711968 A JP S5711968A JP 8735380 A JP8735380 A JP 8735380A JP 8735380 A JP8735380 A JP 8735380A JP S5711968 A JPS5711968 A JP S5711968A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- titled substance
- reaction
- substance
- substances
- 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.)
- Pending
Links
Landscapes
- Quinoline Compounds (AREA)
Abstract
PURPOSE: To obtain the titled substance in high yield, by condensing aniline with an acetone in the presence of an acidic catalyst, distilling away the titled substance and substances having lower boiling points than the titled substance, and reusing the resultant distillation residue as the acidic catalyst for the reaction described above.
CONSTITUTION: Aniline is condensed with an acetone in the presence of a nonvolatile acidic catalyst, e.g. a sulfonic acid, and the titled substance and substances, e.g. the unreacted aniline, having lower boiling points than the titled substance are distilled away. The resultant residue containing the active catalyst is directly used as the acidic catalyst in the next condensing reaction. The distillation residue is a brown to dark brown tarry substance obtained after distilling most of the substances described above from the reaction product at a temperature in the range of 100W 300°C, and usable as the catalyst 4W5 times. However, the activity is lost gradually, and a small amount of the catalyst is preferably added to keep the reaction rate.
EFFECT: Reduced residues formed as a by-product and simplified steps for removing the catalyst.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8735380A JPS5711968A (en) | 1980-06-26 | 1980-06-26 | Preparation of 2,2,4-trimethyl-1,2-dihydroquinoline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8735380A JPS5711968A (en) | 1980-06-26 | 1980-06-26 | Preparation of 2,2,4-trimethyl-1,2-dihydroquinoline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5711968A true JPS5711968A (en) | 1982-01-21 |
Family
ID=13912506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8735380A Pending JPS5711968A (en) | 1980-06-26 | 1980-06-26 | Preparation of 2,2,4-trimethyl-1,2-dihydroquinoline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5711968A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126383U (en) * | 1979-02-26 | 1980-09-06 | ||
| JPS6197479U (en) * | 1984-12-04 | 1986-06-23 |
-
1980
- 1980-06-26 JP JP8735380A patent/JPS5711968A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126383U (en) * | 1979-02-26 | 1980-09-06 | ||
| JPS6197479U (en) * | 1984-12-04 | 1986-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5711968A (en) | Preparation of 2,2,4-trimethyl-1,2-dihydroquinoline | |
| JPS5695142A (en) | Preparation of aliphatic aldehyde | |
| JPS57149239A (en) | Preparation of methacrylic acid | |
| JPS5791982A (en) | Preparation of 5-methylfurfural | |
| JPS5387320A (en) | Method of recovering useful substances from distillation residue of phenolprepared by cumene process | |
| JPS53141216A (en) | Preparation of methacrylic acid ester | |
| JPS58208283A (en) | Preparation of solvent having no change with days using furfuryl alcohol as raw material | |
| JPS56131540A (en) | Preparation of p-nitroaniline | |
| SU108135A1 (en) | The method of obtaining organic compounds containing sulfur and nitrogen | |
| GB961387A (en) | Process for the preparation of 2-cyano-4-nitrostilbenes | |
| Walters et al. | Condensation of Formaldehyde with Reissert Compounds | |
| JPS5651243A (en) | Recovery heteropoly-acid catalyst | |
| SU132213A1 (en) | The method of producing dimethyldioxane | |
| JPS5581829A (en) | Preparation of highly pure m-cresol | |
| JPS5711967A (en) | Preparation of 2,2,4-trimethyl-1,2-dihydroquinoline | |
| CN116730894A (en) | Preparation method of chlorfenapyr intermediate 2- (p-chlorophenyl) -5- (trifluoromethyl) pyrrole-3-nitrile | |
| SU476255A1 (en) | Method for preparing 2-substituted 1,3 dioxepans | |
| JPS54115376A (en) | Preparation of 5-(4-hydroxyphenyl)-hydantoin | |
| JPS5640656A (en) | Recovering method of adiponitrile | |
| JPS5740476A (en) | Novel preparation of triazolylvinyl ketonic compound | |
| JPS5387379A (en) | Preparation of isocyanuric acid triester | |
| JPS55141471A (en) | Preparation of alpha-dimethylamino-epsilon-caprolactam | |
| JPS5495533A (en) | Preparation of derivative of anthranylaldehyde | |
| JPS56113745A (en) | Preparation of bromonitroalcohol | |
| JPS54141789A (en) | Recovery of pyrimidine |