CA1076592A - 4-oxo-4h-1-benzopyran-2-carboxylic acid and derivatives thereof - Google Patents

4-oxo-4h-1-benzopyran-2-carboxylic acid and derivatives thereof

Info

Publication number
CA1076592A
CA1076592A CA264,396A CA264396A CA1076592A CA 1076592 A CA1076592 A CA 1076592A CA 264396 A CA264396 A CA 264396A CA 1076592 A CA1076592 A CA 1076592A
Authority
CA
Canada
Prior art keywords
formula
compound
hydrogen
process according
ester
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.)
Expired
Application number
CA264,396A
Other languages
English (en)
French (fr)
Inventor
Richard Hazard
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.)
Fisons Ltd
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
Application granted granted Critical
Publication of CA1076592A publication Critical patent/CA1076592A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D311/00Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02Heterocyclic 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
    • C07D311/04Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/22Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
    • C07D311/24Benzo[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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Pyrane Compounds (AREA)
CA264,396A 1975-11-25 1976-10-28 4-oxo-4h-1-benzopyran-2-carboxylic acid and derivatives thereof Expired CA1076592A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB4832175 1975-11-25
GB4832275 1975-11-25
GB1473276 1976-04-10

Publications (1)

Publication Number Publication Date
CA1076592A true CA1076592A (en) 1980-04-29

Family

ID=27257160

Family Applications (1)

Application Number Title Priority Date Filing Date
CA264,396A Expired CA1076592A (en) 1975-11-25 1976-10-28 4-oxo-4h-1-benzopyran-2-carboxylic acid and derivatives thereof

Country Status (9)

Country Link
JP (1) JPS5265273A (cs)
CA (1) CA1076592A (cs)
CH (1) CH618435A5 (cs)
DK (1) DK530076A (cs)
ES (1) ES453593A1 (cs)
FI (1) FI763347A7 (cs)
NO (1) NO146498C (cs)
PT (1) PT65881B (cs)
SE (1) SE425313B (cs)

Also Published As

Publication number Publication date
ES453593A1 (es) 1977-12-01
JPS5265273A (en) 1977-05-30
NO146498C (no) 1982-10-13
SE7613152L (sv) 1977-05-26
PT65881A (fr) 1976-12-01
PT65881B (fr) 1978-10-12
SE425313B (sv) 1982-09-20
FI763347A7 (cs) 1977-05-26
NO763856L (cs) 1977-05-26
CH618435A5 (en) 1980-07-31
NO146498B (no) 1982-07-05
DK530076A (da) 1977-05-26

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Legal Events

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