Thiophene derivatives

Details Thiophene derivatives Thiophene derivatives

1977-03-02

1980-10-28

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

424275, C07D33324, A61K 3138

Patent

active

042308739

ABSTRACT:
The invention relates to sulphothiophene-carboxylic acids of the following formula ##STR1## wherein A together with the two carbon atoms to which it is attached forms the group ##STR2## and the broken line represents the double bond present in group (a), R.sub.3 and R.sub.4 each represent a hydrogen atom or a lower alkyl group; and the halides and lower alkyl esters thereof.

REFERENCES:
CIBA, "Chem. Abst.," vol. 47, p. 1399.
CIBA, "Chem. Abst.," vol. 60, p. 10847.

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