JPS56147783A - 3,4-dihydro-2h-pyran-3-one derivative - Google Patents
3,4-dihydro-2h-pyran-3-one derivativeInfo
- Publication number
- JPS56147783A JPS56147783A JP17287580A JP17287580A JPS56147783A JP S56147783 A JPS56147783 A JP S56147783A JP 17287580 A JP17287580 A JP 17287580A JP 17287580 A JP17287580 A JP 17287580A JP S56147783 A JPS56147783 A JP S56147783A
- Authority
- JP
- Japan
- Prior art keywords
- pyran
- dihydro
- formula
- derivative
- derivative shown
- 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.)
- Granted
Links
Landscapes
- Pyrane Compounds (AREA)
Abstract
NEW MATERIAL:The titled derivative shown by the formula I (R is H or 1W6C alkyl).
EXAMPLE: 2-Methyl-3,4-dihydro-2H-pyran-3-one.
USE: An intermediate for a 3-oxy-4H-pyran-4-one shown by the formula II useful as spices for food.
PROCESS: For example, a 5,6-dihydro-2H-pyran-5-one derivative shown by the formula III (R' is H, 1W6C alkyl or 1W6C acryl) is hydrogenerated preferably in a solvent in the presence of a hydrogenating catalyst, e.g., developing Raney nickel, etc. at 20W50°C, to give tetrahydropyran-5-one derivative shown by the formula IV. This compound is then dehydrated or subjected to removal of alcohol in an organic solvent, e.g., toluene, etc. in the presence of a proton catalyst.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17287580A JPS5822150B2 (en) | 1980-12-08 | 1980-12-08 | 3,4-dihydro-2H-pyran-3-one derivative |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17287580A JPS5822150B2 (en) | 1980-12-08 | 1980-12-08 | 3,4-dihydro-2H-pyran-3-one derivative |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8539476A Division JPS5312865A (en) | 1976-07-16 | 1976-07-16 | Preparation of 3-oxy-4h-pyran-4-ones |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56147783A true JPS56147783A (en) | 1981-11-16 |
JPS5822150B2 JPS5822150B2 (en) | 1983-05-06 |
Family
ID=15949920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17287580A Expired JPS5822150B2 (en) | 1980-12-08 | 1980-12-08 | 3,4-dihydro-2H-pyran-3-one derivative |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5822150B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6247461U (en) * | 1985-09-12 | 1987-03-24 | ||
JPS6248864U (en) * | 1985-09-14 | 1987-03-26 |
-
1980
- 1980-12-08 JP JP17287580A patent/JPS5822150B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5822150B2 (en) | 1983-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS56147783A (en) | 3,4-dihydro-2h-pyran-3-one derivative | |
JPS54117445A (en) | Substituted phenylurea derivative, its preparation, and herbicide containing the same | |
JPS56154427A (en) | Novel 2-phenylpropyl ether derivative, its preparation and insecticide and miticide with low toxicity to fish containing the same | |
JPS547427A (en) | Novel disazo compounds and their preparation | |
JPS55100342A (en) | Preparation of nitrodiarylamine | |
JPS5788142A (en) | Preparation of cyclopentenolone compound | |
JPS5214731A (en) | Process for preparation of 4-nitro-3-substituted or unsubstituted-n-al kylanilines | |
JPS54115346A (en) | Substituted-phenylurea derivative, its preparation and herbicide containing the same | |
JPS52107972A (en) | Trap for small animals such as rat by adhesive sheet | |
JPS5714597A (en) | K-41 derivative | |
JPS5495533A (en) | Preparation of derivative of anthranylaldehyde | |
JPS54115347A (en) | Substituted-phenylurea deriavtive, its preparation and herbicide containing the same | |
JPS5585568A (en) | Quinolinone-imine derivative and its preparation | |
JPS5618958A (en) | Preparation of n- d-alpha-methyl-beta-mercaptopropionyl -l- proline derivative | |
JPS5745174A (en) | Preparation of hydroxy-delta-lactone | |
JPS5492942A (en) | Production of 3-amino-2-cyclohexenone | |
JPS55143977A (en) | 1,3-diazepin derivative | |
JPS5711956A (en) | Novel nitro compound and its preparation | |
JPS5764684A (en) | Preparation of 2-(2'-aminoethylthio)-2-thiazoline dihydrohalide derivative | |
JPS56125364A (en) | Pyrroline derivative | |
JPS52100452A (en) | Preparation of n-phosphonomethyl-aniline derivatives | |
JPS537632A (en) | Diphenylamine derivatives | |
JPS5738758A (en) | Substituted benzanilide derivative and germicide containing the same | |
JPS5461158A (en) | 4-1-acetamido-3-(dichlorophenyl) propyl tropolones | |
JPS56152471A (en) | Production of 3-cyanocoumarin derivative |