ES351271A1 - Production of olefinically unsaturated oxo compounds - Google Patents
Production of olefinically unsaturated oxo compoundsInfo
- Publication number
- ES351271A1 ES351271A1 ES351271A ES351271A ES351271A1 ES 351271 A1 ES351271 A1 ES 351271A1 ES 351271 A ES351271 A ES 351271A ES 351271 A ES351271 A ES 351271A ES 351271 A1 ES351271 A1 ES 351271A1
- Authority
- ES
- Spain
- Prior art keywords
- pyran
- dihydro
- production
- olefinically unsaturated
- oxo compounds
- 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
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/56—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds
- C07C45/57—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom
- C07C45/60—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds from heterocyclic compounds with oxygen as the only heteroatom in six-membered rings
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
A process for the production of olefinically unsaturated oxo compounds which contain the carbon-carbon double bond in gamma-delta or delta-epsilon position to the oxo group comprises heating a 5,6-dihydro-4H-pyran in which at least one C atom linked to the C atom in the 6-position carries at least one hydrogen atom with 0À01 to 10% by wt. of water with reference to the dihydropyran, or with a corresponding amount of a substance which splits off water under the reaction conditions, e.g. a tertiary alcohol, at a pressure of 10 to 30 atmospheres at a temperature of 280 to 350 C. Examples prepare 6 - methylhept - 6 - en - 2 - one and 6 - methylhept - 5 - en - 2 - one, from 2,6,6 - trimethyl - 5,6 - dihydro - 4H - pyran, and 5,7,7 - trimethyl - oct - 4 - en - 1 - al and 5 - methylene- 7,7 - dimethyl - octan - 1 - al from 6 - methyl - 6 - neopentyl - 5,6 - dihydro - 4H - pyran.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB91482A DE1275050B (en) | 1967-03-06 | 1967-03-06 | Process for the production of olefinically unsaturated aldehydes and ketones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES351271A1 true ES351271A1 (en) | 1969-06-01 |
Family
ID=6985861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES351271A Expired ES351271A1 (en) | 1967-03-06 | 1968-03-06 | Production of olefinically unsaturated oxo compounds |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT274769B (en) |
| BE (1) | BE711133A (en) |
| CH (1) | CH495933A (en) |
| DE (1) | DE1275050B (en) |
| DK (1) | DK119824B (en) |
| ES (1) | ES351271A1 (en) |
| FR (1) | FR1555118A (en) |
| GB (1) | GB1209199A (en) |
| NL (1) | NL151345B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686321A (en) * | 1971-01-18 | 1972-08-22 | Basf Ag | Production of 2-methylhept-1-en-6-one |
| US4222943A (en) * | 1979-02-05 | 1980-09-16 | Hoffmann-La Roche Inc. | Process for the preparation of esters of 5-formyl-3-methyl-2,4-pentadien-1-ol |
| US4288614A (en) | 1979-02-05 | 1981-09-08 | Hoffmann-La Roche Inc. | Process for the preparation of esters of 5-formyl-3-methyl-2,4-pentadien-1-ol |
-
1967
- 1967-03-06 DE DEB91482A patent/DE1275050B/en active Pending
-
1968
- 1968-02-19 FR FR1555118D patent/FR1555118A/fr not_active Expired
- 1968-02-22 BE BE711133D patent/BE711133A/xx unknown
- 1968-02-27 CH CH280268A patent/CH495933A/en not_active IP Right Cessation
- 1968-03-04 NL NL6803048A patent/NL151345B/en unknown
- 1968-03-05 GB GB1055468A patent/GB1209199A/en not_active Expired
- 1968-03-06 AT AT218168A patent/AT274769B/en active
- 1968-03-06 DK DK91968A patent/DK119824B/en unknown
- 1968-03-06 ES ES351271A patent/ES351271A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DK119824B (en) | 1971-03-01 |
| CH495933A (en) | 1970-09-15 |
| DE1275050B (en) | 1968-08-14 |
| BE711133A (en) | 1968-08-22 |
| AT274769B (en) | 1969-09-25 |
| NL151345B (en) | 1976-11-15 |
| FR1555118A (en) | 1969-01-24 |
| GB1209199A (en) | 1970-10-21 |
| NL6803048A (en) | 1968-09-09 |
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