GB565474A - A process of synthesising aldehydes and lactones - Google Patents
A process of synthesising aldehydes and lactonesInfo
- Publication number
- GB565474A GB565474A GB18254/42A GB1825442A GB565474A GB 565474 A GB565474 A GB 565474A GB 18254/42 A GB18254/42 A GB 18254/42A GB 1825442 A GB1825442 A GB 1825442A GB 565474 A GB565474 A GB 565474A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dimethyl
- hydroxypropionaldehyde
- lactone
- hydroxy
- formation
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/02—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
- C07C47/19—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen containing hydroxy groups
-
- 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
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
- C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
- C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
- C07C45/75—Reactions with formaldehyde
-
- 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
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A halogenated aliphatic hydrocarbon is used as solvent for the recovery of the product in (a) the condensation of formaldehyde with isobutyraldehyde to give a : a - dimethyl - b - hydroxypropionaldehyde, (b) the formation of a -hydroxy-b : b -dimethyl-g -butyrolactone from a : a -dimethyl - b - hydroxypropionaldehyde by converting the latter first into its bisulphite compound and then into the cyanhydrin, followed by hydrolysis and formation of the lactone by heating the resulting acid with water, (c) the extraction of the l-lactone in the resolution of the racemic mixture of a -hydroxy-b : b -dimethyl - g - butyrolactones. In examples, ethylenedichloride, methylenechloride and chloroform are used as solvents in the above processes; propylenedichloride and trichlorethylene are also mentioned.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US565474XA | 1941-12-13 | 1941-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB565474A true GB565474A (en) | 1944-11-13 |
Family
ID=22005119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18254/42A Expired GB565474A (en) | 1941-12-13 | 1942-12-23 | A process of synthesising aldehydes and lactones |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB565474A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001049671A1 (en) * | 1999-12-29 | 2001-07-12 | Oxis Isle Of Man, Limited | Methods for resolving racemic mixtures of 5-substituted 4-hydroxy-2-furanones |
-
1942
- 1942-12-23 GB GB18254/42A patent/GB565474A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001049671A1 (en) * | 1999-12-29 | 2001-07-12 | Oxis Isle Of Man, Limited | Methods for resolving racemic mixtures of 5-substituted 4-hydroxy-2-furanones |
US6613919B2 (en) | 1999-12-29 | 2003-09-02 | Oxis Isle Of Man | Method for resolving racemic mixtures of 5-substituted 4-hydroxy-2-furanones |
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