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DK525482A - PROCEDURE FOR THE PREPARATION OF 3,4-DIHYDRO-ALFA PYRONS - Google Patents

PROCEDURE FOR THE PREPARATION OF 3,4-DIHYDRO-ALFA PYRONS Download PDF

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Publication number
DK525482A
DK525482A DK525482A DK525482A DK525482A DK 525482 A DK525482 A DK 525482A DK 525482 A DK525482 A DK 525482A DK 525482 A DK525482 A DK 525482A DK 525482 A DK525482 A DK 525482A
Authority
DK
Denmark
Prior art keywords
dihydro
preparation
pyrons
alfa
procedure
Prior art date
Application number
DK525482A
Other languages
Danish (da)
Inventor
Hans-Georg Schmidt
Original Assignee
Dynamit Nobel Ag
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 Dynamit Nobel Ag filed Critical Dynamit Nobel Ag
Publication of DK525482A publication Critical patent/DK525482A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
    • C07D309/32—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pyrane Compounds (AREA)
  • Steroid Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

1. Process for the preparation of 3,4-dihydro-alpha-pyrones of the formula see diagramm : EP0081090,P4,F6 in which R**1 , R**2 and R**3 stand for hydrogen and/or alkyl groups with 1 to 10 C-atoms, characterised in that a compound of the formula see diagramm : EP0081090,P4,F7 in which R**1 , R**2 and R**3 have the above indicated meaning, R**4 stands for hydrogen and/or alkyl groups with 1 to 4 C-atoms and Z for the residues see diagramm : EP0081090,P4,F9 is heated to temperatures between 150 and 600 degrees C, optionally in the presence of a catalyst.
DK525482A 1981-12-05 1982-11-25 PROCEDURE FOR THE PREPARATION OF 3,4-DIHYDRO-ALFA PYRONS DK525482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813148153 DE3148153A1 (en) 1981-12-05 1981-12-05 METHOD FOR PRODUCING 3,4-DIHIYDRO (ALPHA) PYRON "

Publications (1)

Publication Number Publication Date
DK525482A true DK525482A (en) 1983-06-06

Family

ID=6147954

Family Applications (1)

Application Number Title Priority Date Filing Date
DK525482A DK525482A (en) 1981-12-05 1982-11-25 PROCEDURE FOR THE PREPARATION OF 3,4-DIHYDRO-ALFA PYRONS

Country Status (5)

Country Link
EP (1) EP0081090B1 (en)
JP (1) JPS58105980A (en)
AT (1) ATE28749T1 (en)
DE (2) DE3148153A1 (en)
DK (1) DK525482A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325505A1 (en) * 1983-07-15 1985-01-31 Dynamit Nobel Ag, 5210 Troisdorf Process for the preparation of 3,4-dihydro- alpha -pyrones
DE3342598A1 (en) * 1983-11-25 1985-06-05 Dynamit Nobel Ag, 5210 Troisdorf METHOD FOR PRODUCING 3,4-DIHYDRO (ALPHA) PYRON
DE3719937A1 (en) * 1987-06-15 1988-12-29 Basf Ag METHOD FOR THE PRODUCTION OF PENTENSIC ACID ESTERS FROM FORMYLVALERICANIC ACID ESTERS
DE3719936A1 (en) * 1987-06-15 1988-12-29 Basf Ag METHOD FOR PRODUCING ADIPINIC ACID
DE3719935A1 (en) * 1987-06-15 1988-12-29 Basf Ag METHOD FOR THE PRODUCTION OF PENTENIC ACID ESTERS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4235780A (en) * 1979-11-01 1980-11-25 Fmc Corporation Derivatives of 2H-pyran-2-one
EP0031932B1 (en) * 1979-12-22 1987-07-01 Hüls Troisdorf Aktiengesellschaft Substituted lactones, pentanoic acid derivatives and process for their preparation

Also Published As

Publication number Publication date
JPS58105980A (en) 1983-06-24
DE3276905D1 (en) 1987-09-10
EP0081090A1 (en) 1983-06-15
DE3148153A1 (en) 1983-08-11
EP0081090B1 (en) 1987-08-05
ATE28749T1 (en) 1987-08-15

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment