JPS56147783A - 3,4-dihydro-2h-pyran-3-one derivative - Google Patents

3,4-dihydro-2h-pyran-3-one derivative

Info

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
Application number
JP17287580A
Other languages
Japanese (ja)
Other versions
JPS5822150B2 (en
Inventor
Shigeru Torii
Hideo Tanaka
Takao Anoda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otsuka Chemical Co Ltd
Otsuka Kagaku Yakuhin KK
Original Assignee
Otsuka Chemical Co Ltd
Otsuka Kagaku Yakuhin KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Otsuka Chemical Co Ltd, Otsuka Kagaku Yakuhin KK filed Critical Otsuka Chemical Co Ltd
Priority to JP17287580A priority Critical patent/JPS5822150B2/en
Publication of JPS56147783A publication Critical patent/JPS56147783A/en
Publication of JPS5822150B2 publication Critical patent/JPS5822150B2/en
Expired legal-status Critical Current

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  • 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
JP17287580A 1980-12-08 1980-12-08 3,4-dihydro-2H-pyran-3-one derivative Expired JPS5822150B2 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6247461U (en) * 1985-09-12 1987-03-24
JPS6248864U (en) * 1985-09-14 1987-03-26

Also Published As

Publication number Publication date
JPS5822150B2 (en) 1983-05-06

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