Ciba-Geigy Corporation

Alan J Main

Gordon N Walker

Shripad S Bhagwat

Herman Robert Rodriguez

Naokata Yokoyama, Deceased

Ivan Ernest

Andreas Von Sprecher

Andreas Beck

Naokato Yokoyama, Deceased

Disclosed are compounds of formula ##STR1## wherein R is hydroxy, esterified hydroxy or etherified hydroxy;

Heteroacetic acid derivatives

The invention relates to the compounds of the formula ##STR1## wherein the C(.dbd.NH)--NHR group may be in tautomeric or isomeric form, and pharmaceutically acceptable salts thereof, in which:

Arylethers, their manufacture and methods of treatment

The present invention is concerned with compounds of formula I ##STR1## wherein A, B, M, R, Ar and Het are as defined in the specification, pharmaceutically acceptable ester and amide derivatives thereof; N-oxides thereof, tetrazole derivatives thereof, and salts thereof. These compounds have valuable pharmacological activities, especially as inhibitors of thromboxane synthetase and as receptor antagonists of thromboxane A.sub.2 and prostaglandin H.sub.2.

Certain (arylsulfonamido- and imidazolyl-)-substituted carboxylic acids

Disclosed are the compounds of formula ##STR1## wherein A represents lower alkylene; B represents oxygen, sulfur, lower alkylene, lower alkylene interrupted by oxygen, sulfur, sulfinyl or sulfonyl, (oxy-, sulfinyl-, sulfonyl- or thio)-lower alkylene, lower alkenylene, phenylene or a direct bond; M represents lower alkylene, lower alkylene interrupted by oxygen, sulfur, sulfinyl or sulfonyl, (oxy-, sulfinyl, sulfonyl- or thio)-lower alkylene, lower alkenylene or a direct bond; or one of A, B and M represents lower alkylidenylene and the other two independently represent lower alkylene; R represents hydrogen unless A, B or M represents lower alkylidenylene in which case R represents the second bond to the adjacent aklylidenylene unsaturated carbon atom; Het represents 1-imidazolyl, 3-pyridyl, or 1-imidazolyl or 3-pyridyl substituted by lower alkyl; Ar represents carbocyclic or heterocyclic aryl; pharmaceutically acceptable ester and amide derivatives thereof; the N-oxides of said compounds wherein Het represents optionally substituted pyridyl; the said compounds of formula I wherein COOH is replaced by 5-tetrazolyl; and the pharmaceutically acceptable salts; which are useful as thromboxane synthetase inhibitors and thromboxane receptor antagonists.

(Arylsulfonamido- and pyridyl-)-substituted carboxylic acids and

Novel asymmetric thioethers of the formula ##STR1## in which R.sup.1 represents a C.sub.1-3 -alkyl radical or a C.sub.1-3 -hydroxyalkyl radical of which the hydroxy group may be in esterified form,

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Basking Ridge, NJ, United States of America

Alan J Main