SE7903345L - PROCEDURE FOR THE PREPARATION OF CHROMON-2-CARBOXYLIC ACIDS - Google Patents

PROCEDURE FOR THE PREPARATION OF CHROMON-2-CARBOXYLIC ACIDS

Info

Publication number
SE7903345L
SE7903345L SE7903345A SE7903345A SE7903345L SE 7903345 L SE7903345 L SE 7903345L SE 7903345 A SE7903345 A SE 7903345A SE 7903345 A SE7903345 A SE 7903345A SE 7903345 L SE7903345 L SE 7903345L
Authority
SE
Sweden
Prior art keywords
preparation
carboxylic acids
chromon
procedure
hydroxy
Prior art date
Application number
SE7903345A
Other languages
Swedish (sv)
Inventor
A H Ingall
Original Assignee
Fisons 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 Fisons Ltd filed Critical Fisons Ltd
Publication of SE7903345L publication Critical patent/SE7903345L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/22—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
    • C07D311/24—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pyrane Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Abstract

326,057. There is provided an improved process for the preparation of chromone-2-carboxylic acids which comprises reacting 2'-hydroxy-2-alkylsulphinylacetophenones, provided that the alkyl moieties thereof have no free hydrogen atoms on the .beta.-carbon atom (where present), or 2'-hydroxy-2-phenyl-sulphinylacetophenones with glyoxylic acid in the presence of a base.
SE7903345A 1978-04-20 1979-04-17 PROCEDURE FOR THE PREPARATION OF CHROMON-2-CARBOXYLIC ACIDS SE7903345L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1558678 1978-04-20

Publications (1)

Publication Number Publication Date
SE7903345L true SE7903345L (en) 1979-10-21

Family

ID=10061792

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7903345A SE7903345L (en) 1978-04-20 1979-04-17 PROCEDURE FOR THE PREPARATION OF CHROMON-2-CARBOXYLIC ACIDS

Country Status (8)

Country Link
JP (1) JPS54141776A (en)
CA (1) CA1140140A (en)
DK (1) DK158979A (en)
ES (1) ES479710A1 (en)
FI (1) FI791231A (en)
NO (1) NO791298L (en)
PT (1) PT69519A (en)
SE (1) SE7903345L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0662601B2 (en) * 1985-08-16 1994-08-17 京都薬品工業株式会社 Cromoglycic acid derivative and anti-allergic agent

Also Published As

Publication number Publication date
JPS54141776A (en) 1979-11-05
PT69519A (en) 1979-05-01
ES479710A1 (en) 1980-08-16
NO791298L (en) 1979-10-23
CA1140140A (en) 1983-01-25
DK158979A (en) 1979-10-21
FI791231A (en) 1979-10-21

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