CS191997B2 - Process for preparing derivatives of 4-oxo-4h-benzopyran-2-carboxylic acid - Google Patents

Process for preparing derivatives of 4-oxo-4h-benzopyran-2-carboxylic acid

Info

Publication number: CS191997B2
Authority: CS; Czechoslovakia
Prior art keywords: benzopyran; oxo; carboxylic acid; preparing derivatives; derivatives
Prior art date: 1974-11-30

Application number

CS131477A

Other languages

Czech (cs)

Inventor

Roger Ch Brown

Richard Hazard

John Mann

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.)

1974-11-30

Filing date

1975-11-21

Publication date

1979-07-31

1974-11-30 Priority claimed from GB51944/74A external-priority patent/GB1517153A/en

1975-11-21 Application filed by Fisons Ltd filed Critical Fisons Ltd

1979-07-31 Publication of CS191997B2 publication Critical patent/CS191997B2/en

Links

RVMGXWBCQGAWBR-UHFFFAOYSA-N 4-oxo-1-benzopyran-2-carboxylic acid Chemical class C1=CC=C2OC(C(=O)O)=CC(=O)C2=C1 RVMGXWBCQGAWBR-UHFFFAOYSA-N 0.000 title 1
238000004519 manufacturing process Methods 0.000 title 1

CS131477A 1974-11-30 1975-11-21 Process for preparing derivatives of 4-oxo-4h-benzopyran-2-carboxylic acid CS191997B2 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB51944/74A GB1517153A (en)	1974-11-30	1974-11-30	Naphthopyran-and benzodipyran-2-carboxylic acids and derivatives thereof
GB2104375		1975-05-16

Publications (1)

Publication Number	Publication Date
CS191997B2 true CS191997B2 (en)	1979-07-31

Family

ID=26255067

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CS131477A CS191997B2 (en)	1974-11-30	1975-11-21	Process for preparing derivatives of 4-oxo-4h-benzopyran-2-carboxylic acid

Country Status (2)

Country	Link
CS (1)	CS191997B2 (en)
SU (2)	SU793394A3 (en)

1975
- 1975-11-21 CS CS131477A patent/CS191997B2/en unknown
- 1975-11-27 SU SU752191857A patent/SU793394A3/en active
1976
- 1976-07-05 SU SU762377398A patent/SU622402A3/en active

Also Published As

Publication number	Publication date
SU793394A3 (en)	1980-12-30
SU622402A3 (en)	1978-08-30

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