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
CS191997B2 CS131477A CS131477A CS191997B2 CS 191997 B2 CS191997 B2 CS 191997B2 CS 131477 A CS131477 A CS 131477A CS 131477 A CS131477 A CS 131477A CS 191997 B2 CS191997 B2 CS 191997B2
Authority
CS
Czechoslovakia
Prior art keywords
benzopyran
oxo
carboxylic acid
preparing derivatives
derivatives
Prior art date
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.)
Filing date
Publication date
Priority claimed from GB51944/74A external-priority patent/GB1517153A/en
Application filed by Fisons Ltd filed Critical Fisons Ltd
Publication of CS191997B2 publication Critical patent/CS191997B2/en

Links

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)

Also Published As

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

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