GB920372A - Process for the manufacture of enol-acetates - Google Patents
Process for the manufacture of enol-acetatesInfo
- Publication number
- GB920372A GB920372A GB19630/60A GB1963060A GB920372A GB 920372 A GB920372 A GB 920372A GB 19630/60 A GB19630/60 A GB 19630/60A GB 1963060 A GB1963060 A GB 1963060A GB 920372 A GB920372 A GB 920372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- catalyst
- enol
- acid
- acetates
- acetate
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/16—Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/46—Preparation of carboxylic acid esters from ketenes or polyketenes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
A catalyst for the preparation of enol-acetates from ketene and an enolizable organic compound (see Group IV(b)) comprises an equimolecular mixture of monofluorophosphoric acid and difluorophosphoric acid which may be prepared by reaction between phosphorus pentoxide and hydrogen fluoride. This catalyst, or difluorophosphoric acid alone, may be neutralized with sodium acetate after the enolacetate preparation is complete.ALSO:Enol-acetates are prepared by reaction between ketene and an enolisable carbonyl compound at a temperature of 20-110 DEG C. in the presence of difluorophosphoric acid or a mixture of equimolecular proportions of difluorophosphoric acid and monofluorophosphoric acid as catalyst (see Group III). The process may be carried out continuously or discontinuously and the catalyst is preferably used in a concentration of 0.01 to 2.0% calculated on the total weight of the reactants. The catalyst is preferably neutralised (see Group III) before isolating the desired reaction product, acetic acid being formed during the neutralisation. In examples the following compounds are prepared: (1)-(5) isopropenyl acetate from acetone; (6) a -acetoxystyrene from acetophenone; (7) n-but-1-enyl acetate from n-butyraldehyde; (8) the enol acetate of ethyl acetoacetate; (9) the mono- and (10) the mono- and di-enol acetates of acetylacetone. Acetic anhydride is formed as a by-product.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW25734A DE1121605B (en) | 1959-06-02 | 1959-06-02 | Process for the preparation of enol acetates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB920372A true GB920372A (en) | 1963-03-06 |
Family
ID=7598160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19630/60A Expired GB920372A (en) | 1959-06-02 | 1960-06-02 | Process for the manufacture of enol-acetates |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE591509A (en) |
| CH (1) | CH410910A (en) |
| DE (1) | DE1121605B (en) |
| GB (1) | GB920372A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111448180A (en) * | 2017-12-18 | 2020-07-24 | 巴斯夫欧洲公司 | Preparation of acetate compounds by ketene compounds |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19634147A1 (en) * | 1996-08-23 | 1998-02-26 | Basf Ag | Process for the preparation of 1-acetyl-4-piperidones |
-
1959
- 1959-06-02 DE DEW25734A patent/DE1121605B/en active Pending
-
1960
- 1960-03-15 CH CH292160A patent/CH410910A/en unknown
- 1960-06-02 BE BE591509A patent/BE591509A/en unknown
- 1960-06-02 GB GB19630/60A patent/GB920372A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111448180A (en) * | 2017-12-18 | 2020-07-24 | 巴斯夫欧洲公司 | Preparation of acetate compounds by ketene compounds |
| CN111448180B (en) * | 2017-12-18 | 2023-08-15 | 巴斯夫欧洲公司 | Preparation of acetate compounds by ketene compounds |
Also Published As
| Publication number | Publication date |
|---|---|
| CH410910A (en) | 1966-04-15 |
| BE591509A (en) | 1960-12-02 |
| DE1121605B (en) | 1962-01-11 |
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