UST993005I4 - Preparation of aromatic fluoro compounds - Google Patents
Preparation of aromatic fluoro compounds Download PDFInfo
- Publication number
- UST993005I4 UST993005I4 US06/022,597 US2259779A UST993005I4 US T993005 I4 UST993005 I4 US T993005I4 US 2259779 A US2259779 A US 2259779A US T993005 I4 UST993005 I4 US T993005I4
- Authority
- US
- United States
- Prior art keywords
- diphenylmethane
- yield
- preparation
- difluorobenzophenone
- difluoro
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/76—Ketones containing a keto group bound to a six-membered aromatic ring
- C07C49/80—Ketones containing a keto group bound to a six-membered aromatic ring containing halogen
- C07C49/813—Ketones containing a keto group bound to a six-membered aromatic ring containing halogen 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
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
-
- 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
- C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
- C07C45/28—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of CHx-moieties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a process for the preparation of 4,4'-difluorobenzophenone. 4,4-difluorobenzophenone may be prepared by diazotization of 4,4'-diamino-diphenylmethane in anhydrous or concentrated aqueous hydrogen fluoride, decomposition of the diazonium fluoride thus produced to yield 4,4'-difluoro-diphenylmethane and oxidation of 4,4'-difluoro-diphenylmethane to yield 4,4'-difluorobenzophonone.
Thus, according to the present invention, there is provided a process for the preparation of 4,4'-difluorobenzophenone which comprises the following steps:
(1) diazotization of 4,4'-diamino-diphenylmethane in anhydrous or concentrated aqueous hydrogen fluoride to yield a solution of a corresponding diazonium fluoride; and
(2) (i) thermally decomposing the diazonium fluoride in the solution thus produced to yield 4,4'-difluoro-diphenylmethane and (ii) subsequently oxidizing the 4,4'-difluoro-diphenylmethane to yield 4,4'-difluorobenzophenone.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1266478 | 1978-03-31 | ||
| GB12664/78 | 1978-03-31 | ||
| GB7832842 | 1978-08-10 | ||
| GB32842/78 | 1978-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST993005I4 true UST993005I4 (en) | 1980-04-01 |
Family
ID=26249181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/022,597 Pending UST993005I4 (en) | 1978-03-31 | 1979-03-19 | Preparation of aromatic fluoro compounds |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST993005I4 (en) |
-
1979
- 1979-03-19 US US06/022,597 patent/UST993005I4/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2183185T3 (en) | PROCEDURE TO PREPARE TETRAAZAMACROCICLOS. | |
| JPS6472901A (en) | Production of lithium fluoride complex salt | |
| ES482153A1 (en) | Phenethanolamines, their formulations, preparation and use. | |
| UST993005I4 (en) | Preparation of aromatic fluoro compounds | |
| GR3002689T3 (en) | Process for producing 2-methyl-1,4-naphthoquinone | |
| IE43099L (en) | Process for the preparation of anhydrous percarboxylic acid¹solutions in benzene. | |
| IE811165L (en) | Process for the preparation of diacetone-ketogulonic acid | |
| IT7925016A0 (en) | PROCEDURE FOR PRODUCING HYDROGEN AND SULFURIC ACID BY ELECTROCHEMICAL DECOMPOSITION OF AN ELECTROLYTE, AS WELL AS AN ELECTRODE TO IMPLEMENT THE ELECTROCHEMICAL DECOMPOSITION. | |
| EP0387913A3 (en) | Process for production of alkyl glycoside stable in hue and odor | |
| EP0882768A3 (en) | Method for producing of phthalocyanine compound | |
| Barbero et al. | N-Hydroxy-o-benzenedisulfonimide: a misunderstood selective oxidizing agent | |
| MY112143A (en) | Chlorination of difluoromethyl methyl ether | |
| FR2432010A1 (en) | Meta-phenoxy-benzaldehyde prepn. - from 1-bromo-3-dioxolanyl-benzene and phenol | |
| JPS5740434A (en) | Preparative method of difluorobromoacetyl fluoride | |
| JPS57126982A (en) | Preparation of 4,4'-dinitrodiphenylsulfone and 4,4'- dinitrodiphenylsulfoxide | |
| JPS5531005A (en) | Preparation of 5'-(3-pyrydyl)-n'-methyl-pyrrolidone-2' | |
| CA2024865A1 (en) | Preparation of 3-methylquinoline-8-carboxylic acid | |
| JPS55164644A (en) | Preparation of difluoroiodoacetylfluoride | |
| JPS5398926A (en) | Preparation of azodicarbonamides | |
| JPS5553240A (en) | Preparation of m-substituted benzoic acid | |
| GB2012263A (en) | Aldehyde adducts | |
| JPS5728026A (en) | Preparation of aromatic dicarboxylic acid | |
| JPS5569542A (en) | Preparation of dinitrodiphenyl ether | |
| JPS5350085A (en) | Production of hydrogen | |
| JPS5566530A (en) | Preparation of hydroquinone |