GB573087A - Process for the preparation of 2-methyl-4-keto-1,3-dioxolane - Google Patents
Process for the preparation of 2-methyl-4-keto-1,3-dioxolaneInfo
- Publication number
- GB573087A GB573087A GB17886/43A GB1788643A GB573087A GB 573087 A GB573087 A GB 573087A GB 17886/43 A GB17886/43 A GB 17886/43A GB 1788643 A GB1788643 A GB 1788643A GB 573087 A GB573087 A GB 573087A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- dioxolane
- keto
- mercuric
- mixture
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
- C07D317/10—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings
- C07D317/32—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D317/34—Oxygen atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)
Abstract
2 - Methyl - 4 - keto - 1,3 - dioxolane is prepared by reacting acetylene at 0-50 DEG C., with hydroxyacetic acid in an anhydrous medium in the presence of a catalyst containing mercuric sulphate and a lower fatty acid anhydride of not more than 8 carbon atoms. The anhydrous medium may be a dialkyl ketone containing not more than 5 carbon atoms in the molecule such as acetone, methyl ethyl ketone or methylisopropyl ketone or a lower aliphatic alcohol such as methanol. The catalyst can be prepared by mixing mercuric sulphate with sulphuric acid and acetic anhydride, or by mixing mercuric sulphate acetate or phosphate with mercuric oxide and adding more than one mol. of sulphuric acid and acetic anhydride per mol. of mercuric oxide. Other fatty acid anhydrides which may be used are propionic and butyric. In the examples: (1) a mixture of hydroxyacetic acid, dry acetone, mercuric sulphate, mercuric oxide and a dehydrating agent of anhydrous sodium sulphate are placed in a pressure bomb and a cooled mixture of sulphuric acid and acetic anhydride added. Acetylene is introduced under pressure and the apparatus agitated. 2 - Methyl - 4 - keto - 1,3 - dioxolane is obtained from the reaction mixture by adding sodium acetate and water, extracting with ether and fractionally distilling at atmospheric pressure and under vacuum; (2) a mixture is prepared as in example (1) and acetylene passed through the mixture for some hours. 2 - Methyl-4-keto-1,3-dioxolane is obtained from the reaction mixture in the same manner as in example (1). 2 - Methyl - 4 - keto - 1,3 - dioxolane may be used as a solvent and plasticizer and in the modification of hydroxyl containing polymers, such as cellulose and polyvinyl alcohol. It can be polymerized by treatment with sulphuric acid, hydrochloric acid and boron trifluoride.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US573087XA | 1942-10-30 | 1942-10-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB573087A true GB573087A (en) | 1945-11-06 |
Family
ID=22009804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17886/43A Expired GB573087A (en) | 1942-10-30 | 1943-10-29 | Process for the preparation of 2-methyl-4-keto-1,3-dioxolane |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB573087A (en) |
-
1943
- 1943-10-29 GB GB17886/43A patent/GB573087A/en not_active Expired
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