CS191957B2 - Method of preparing derivatives of 4-oxo-4h-benzopyrane-2-carboxylic acid - Google Patents

Method of preparing derivatives of 4-oxo-4h-benzopyrane-2-carboxylic acid

Info

Publication number
CS191957B2
CS191957B2 CS791275A CS791275A CS191957B2 CS 191957 B2 CS191957 B2 CS 191957B2 CS 791275 A CS791275 A CS 791275A CS 791275 A CS791275 A CS 791275A CS 191957 B2 CS191957 B2 CS 191957B2
Authority
CS
Czechoslovakia
Prior art keywords
benzopyrane
oxo
carboxylic acid
preparing derivatives
derivatives
Prior art date
Application number
CS791275A
Other languages
English (en)
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 CS191957B2 publication Critical patent/CS191957B2/cs

Links

CS791275A 1974-11-30 1975-11-21 Method of preparing derivatives of 4-oxo-4h-benzopyrane-2-carboxylic acid CS191957B2 (en)

Applications Claiming Priority (3)

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
GB2104475 1975-05-16

Publications (1)

Publication Number Publication Date
CS191957B2 true CS191957B2 (en) 1979-07-31

Family

ID=27257950

Family Applications (1)

Application Number Title Priority Date Filing Date
CS791275A CS191957B2 (en) 1974-11-30 1975-11-21 Method of preparing derivatives of 4-oxo-4h-benzopyrane-2-carboxylic acid

Country Status (2)

Country Link
CS (1) CS191957B2 (cs)
PL (1) PL106681B1 (cs)

Also Published As

Publication number Publication date
PL106681B1 (pl) 1980-01-31

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