JPS5444675A - Production of 3-hydroxy-4-pyrone analog - Google Patents

Production of 3-hydroxy-4-pyrone analog

Info

Publication number
JPS5444675A
JPS5444675A JP10967577A JP10967577A JPS5444675A JP S5444675 A JPS5444675 A JP S5444675A JP 10967577 A JP10967577 A JP 10967577A JP 10967577 A JP10967577 A JP 10967577A JP S5444675 A JPS5444675 A JP S5444675A
Authority
JP
Japan
Prior art keywords
pyrone
hydroxy
dihydro
halide
halogen
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.)
Pending
Application number
JP10967577A
Other languages
Japanese (ja)
Inventor
Akira Yamamoto
Akira Hayashida
Kenichi Taguchi
Toshinobu Ishihara
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.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
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 Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Priority to JP10967577A priority Critical patent/JPS5444675A/en
Priority to FR7825986A priority patent/FR2402654A1/en
Publication of JPS5444675A publication Critical patent/JPS5444675A/en
Pending legal-status Critical Current

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  • Pyrane Compounds (AREA)

Abstract

PURPOSE: A halide from a specific 5-pyrone derivative is heated in a closed system to yield title compound useful as flavor intensifier for foods in high yield without side reaction and danger of explosion.
CONSTITUTION: 5,6-Dihydro-5-pyrone derivative of formulaI(R1, R2 are H, 1W6C monofunctional hydrocarbyl group) such as 2-methoxy-5,6-dihydro-5-pyrone is halogenated with the equimolar amount of a halogen in an organic solvent to form the compound of formula II (X is halogen). The halide is mixed with an aqueous solution containing or not containing an acid or alkali catalyst such as phosphoric acid or alkylbenzenesulfonic acid and heated at 50W130, preferably 80W100°C to give 3- hydroxy-4-pyrone of formula III.
COPYRIGHT: (C)1979,JPO&Japio
JP10967577A 1977-09-12 1977-09-12 Production of 3-hydroxy-4-pyrone analog Pending JPS5444675A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10967577A JPS5444675A (en) 1977-09-12 1977-09-12 Production of 3-hydroxy-4-pyrone analog
FR7825986A FR2402654A1 (en) 1977-09-12 1978-09-11 Tetra:hydro-pyranone derivs. - useful as intermediates for cpds. used as food flavours

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10967577A JPS5444675A (en) 1977-09-12 1977-09-12 Production of 3-hydroxy-4-pyrone analog

Publications (1)

Publication Number Publication Date
JPS5444675A true JPS5444675A (en) 1979-04-09

Family

ID=14516320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10967577A Pending JPS5444675A (en) 1977-09-12 1977-09-12 Production of 3-hydroxy-4-pyrone analog

Country Status (1)

Country Link
JP (1) JPS5444675A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127428A (en) * 1981-01-29 1982-08-07 Reika Kogyo Kk Mixer
JPS644223A (en) * 1987-06-24 1989-01-09 Sumitomo Heavy Industries Equipment for dissolving carbon dioxide
JPH06292822A (en) * 1992-04-03 1994-10-21 Jinzo Nagahiro Production of high-concentration ozonized water and apparatus for production of high-concentration ozonized water

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5318578A (en) * 1976-08-02 1978-02-20 Pfizer Production of gammaa pylones

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5318578A (en) * 1976-08-02 1978-02-20 Pfizer Production of gammaa pylones
JPS5436267A (en) * 1976-08-02 1979-03-16 Pfizer Production of gammaapyrones

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127428A (en) * 1981-01-29 1982-08-07 Reika Kogyo Kk Mixer
JPS6354414B2 (en) * 1981-01-29 1988-10-27 Reika Kogyo Kk
JPS644223A (en) * 1987-06-24 1989-01-09 Sumitomo Heavy Industries Equipment for dissolving carbon dioxide
JPH0370534B2 (en) * 1987-06-24 1991-11-08 Sumitomo Heavy Industries
JPH06292822A (en) * 1992-04-03 1994-10-21 Jinzo Nagahiro Production of high-concentration ozonized water and apparatus for production of high-concentration ozonized water

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