Abstract: Thiazole derivatives represented by the general formula: ##STR1## wherein A is oxygen, sulfur, imino, or NR.sub.3, wherein R.sub.3 is C.sub.1-5 alkyl, C.sub.2-5 alkenyl, C.sub.3-5 alkynyl, C.sub.3-6 cycloalkyl-C.sub.1-3 alkyl or C.sub.7-8 aralkyl; R.sub.1 is hydrogen, C.sub.1-5 alkyl, C.sub.2-5 alkenyl, C.sub.3-5 alkynyl, C.sub.3-6 cycloalkyl-C.sub.1-3 alkyl or C.sub.7-8 aralkyl; R.sub.2 is hydroxy, C.sub.1-5 alkoxy or OM, wherein M is alkali metal, or one equivalent of alkaline earth metal, cupric or aluminum cation; n is an integer of 0 or 1; X.sub.1 and X.sub.2 are independently hydrogen or C.sub.1-5 alkyl; Y.sub.1 and Y.sub.2 are independently hydrogen, halogen, C.sub.1-5 alkyl, C.sub.1-5 alkoxy or trifluoromethyl; and the group ##STR2## is linked to one of the meta or para positions of the benzene ring A, n is not 0 when A is imino and --CH.sub.2 --COR.sub.2 does not substitute the thiazole ring when A is imino, being useful as anti-inflammatory, anti-rheumatic, analgesic or anti-lipemia agents.

Abstract: Thiazole derivatives represented by the general formula: ##STR1## wherein A is oxygen, sulfur, imino, or NR.sub.3, wherein R.sub.3 is C.sub.1.sub.-5 alkyl, C.sub.2.sub.-5 alkenyl, C.sub.3.sub.-5 alkynyl, C.sub.3.sub.-6 cycloalkyl-C.sub.1.sub.-3 alkyl or C.sub.7.sub.-8 aralkyl; R.sub.1 is hydrogen, C.sub.1.sub.-5 alkyl, C.sub.2.sub.-5 alkenyl, C.sub.3.sub.-5 alkynyl, C.sub.3.sub.-6 cycloalkyl-C.sub.1.sub.-3 alkyl or C.sub.7.sub.- 8 aralkyl; R.sub.2 is hydroxy, C.sub.1.sub.-5 alkoxy or OM, wherein M is alkali metal, or one equivalent of alkaline earth metal, cupric or aluminum cation; n is an integer of 0 or 1; X.sub.1 and X.sub.2 are independently hydrogen or C.sub.1.sub.-5 alkyl; Y.sub.1 and Y.sub.2 are independently hydrogen, halogen, C.sub.1.sub.-5 alkyl, C.sub.1.sub.-5 alkoxy or trifluoromethyl; and the group ##STR2## is linked to one of the meta or para positions of the benzene ring A, n is not 0 when A is imino and --CH.sub.2 --COR.sub.

Abstract: Thiazoline derivatives represented by the general formula: ##STR1## wherein X.sub.1 represents hydrogen or methyl; Y.sub.1 and Y.sub.2 each represents hydrogen, halogen, C.sub.1.sub.-3 alkyl, C.sub.1.sub.-3 alkoxy or trifluoromethyl; R.sub.1 represents hydrogen, methyl, or ethyl; R.sub.2 represents C.sub.1.sub.-3 alkyl or C.sub.3.sub.-5 alkenyl and Z represents hydrogen, carboxy or carboxy ester group and its esters and pharmaceutically acceptable salts, synthesized by quaternization and acid-elimination reaction being useful as anti-inflammatory, anti-rheumatic, analgesic and anti-pyretic agents.

Abstract: Substituted acetic acid derivatives represented by the formula: ##SPC1##Wherein X, X', X", Y, Y' and Y" each represents a hydrogen atom, an alkyl group of 1 to 8 carbon atoms, an alkoxy group of 1 to 8 carbon atoms, a hydroxy group, an acyl group, an acylamino group, an acyloxy group, an amino group, a cyano group, a nitro group, an alkoxycarbonyl group of 2 to 9 carbon atoms, an alkoxycarbonylalkyl group of 3 to 10 carbon atoms, an alkoxycarbonylamino group of 2 to 9 carbon atoms, a trifluoromethyl group, a halogen atom, a carboxy group, or a carbamoyl group, two of X, X' and X", or two of Y, Y' and Y" are optionally combined to form an alicyclic ring of 5 to 7 carbon atoms or a benzene ring, A represents an oxygen atom or a sulfur atom, R and R.sub.

Abstract: Substituted acetic acid derivatives represented by the formula: ##SPC1##Wherein X, X', X", Y, Y' and Y" each represents a hydrogen atom, an alkyl group of 1 to 8 carbon atoms, an alkoxy group of 1 to 8 carbon atoms, a hydroxy group, an acyl group, an acylamino group, an acyloxy group, an amino group, a cyano group, a nitro group, an alkoxycarbonyl group of 2 to 9 carbon atoms, an alkoxycarbonylalkyl group of 3 to 10 carbon atoms, an alkoxycarbonylamino group of 2 to 9 carbon atoms, a trifluoromethyl group, a halogen atom, a carboxy group, or a carbamoyl group, two of X, X' and X", or two of Y, Y' and Y" are optionally combined to form an alicyclic ring of 5 to 7 carbon atoms or a benzene ring, A represents an oxygen atom or a sulfur atom, R and R.sub.