Abstract: A compound of formula (II): ##STR1## in which R is a hydrogen atom or a carboxy, alkoxycarbonyl, --CO--NR.sub.4 R.sub.5, --PO.sub.3 H.sub.2 or --CH.sub.2 OH radical, and R.sub.1 is an -alk-NH.sub.2, -alk-NH--CO--R.sub.3, -alk-COOR.sub.4, -alk-CO--NR.sub.5 R.sub.6 or --CO--NH--R.sub.7 radical. The compounds of formula (II) can be used to prepare compounds of formula (I): ##STR2## in which R and R.sub.1 have the same meanings as above. The compounds of formula (I) have valuable pharmacological properties and are antagonists of the .alpha.-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor, also known as the quisqualate receptor. The compounds of formula (I) are also non-competitive antagonists of the N-methyl-D-aspartate (NMDA) receptor and more specifically are ligands for NMDA receptor glycine modulator sites.

Abstract: Compounds of formula (I): ##STR1## wherein R represents a CR.sub.4 R.sub.5, CHR.sub.6, or C.dbd.R.sub.7 radical and R.sub.3 represents an oxygen atom, salts thereof, the preparation thereof and drugs containing same. The compounds of formula (I) have valuable pharmacological properties and are alpha-amino-3-hydroxy-5-methyl-4-osoxaziepropionic acid (AMPA) receptor antagonists, said receptor also being known as the quisqualate receptor. Furthermore, the compounds of formula (I) are non-competitive N-methyl-D-aspartate (NMDA) receptor antagonists, and particularly NMDA receptor glycine modulation site ligands.

Abstract: Compounds of formula (I), wherein R is a hydrogen atom or a carboxy, alkoxycarbonyl, --CO--NR.sub.4 R.sub.5, --PO.sub.3 H.sub.2 or --CH.sub.2 OH radical, and R.sub.1 is an -alk-NH.sub.2, -alk-NH--CO--R.sub.3, -alk-COOR.sub.4, -alk-CO--NR.sub.5 R.sub.6 or --CO--NH--R.sub.7 radical. The compounds of formula (I) have valuable pharmacological properties and are antagonists of the .alpha.-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor also known as the quisqualate receptor. Furthermore, the compounds of formula (I) are non-competitive antagonists of the N-methyl-D-aspartame (NMDA) receptor and more specifically are ligands for NMDA receptor glycine modulator sites.

Abstract: The compounds of formula (I) ##STR1## wherein R, R.sub.1 and R.sub.2 are defined in the disclosure, and salts thereof.The compounds of formula (I) are non-competitive N-methyl-D-asparate (NMDA) receptor antagonists, particularly NMDA receptor glycine modulation site ligands, and are alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor antagonists, this receptor is also known as the quisqualate receptor.

Abstract: Compounds of formula (I): ##STR1## wherein R.sub.3 and R.sub.4, taken together with the carbon atom to which they are attached, form (a) a 2- or 3-pyrrolidine ring, a 2- or 4-piperidine ring or a 2-azacycloheptane ring, said rings being optionally substituted at the nitrogen atom by an alkyl, --CHO, --COOR.sub.11, --CO--alk--COOR.sub.6, --CO--alk--NR.sub.6 R.sub.12, --CO--alk--CONR.sub.6 R.sub.8, --CO--COOR.sub.6, --CO--CH.sub.2 --O--CH.sub.2 --COOR.sub.6, --CO--CH.sub.2 --S--CH.sub.2 --COOR.sub.6, --CO--CH.dbd.CH--COOR.sub.6, CO--alk, --CO--Ar", --CO--alk--Ar", --CO--NH--Ar", --CO--NH--alk--Ar", --CO--Het, --CO--alk--Het, --CO--NH--Het, --CO--NH--alk--Het, --CO--NH.sub.2, --CO--NH--alk, --CO--N(alk)alk', --CS--NH.sub.2, --CS--NH--alk, --CS--NH--Ar", --CS--NH--Het, --alk--Het, --alk--NR.sub.6 R.sub.8, --alk--COOR.sub.6, --alk--CO--NR.sub.6 R.sub.8, --alk--Ar", --SO.sub.2 --alk or --SO.sub.

Abstract: A compound of formula (I): ##STR1## wherein R, R.sub.1, R.sub.2, and R.sub.3 are as defined in the application, salts thereof, preparation thereof and drugs containing same.

Abstract: Compounds having the formula (I) wherein R and R.sub.1, similar or different, represent a hydrogen or halogen atom or a radical alkyl, alkoxy, amino, acylamino, phenylureido, --N.dbd.CH--N(R.sub.2)R.sub.3, nitro, imidazolyl, phenyl, SO.sub.3 H or cyano; R.sub.2 and R.sub.3 which may be similar or different, represent each an alkyl radical; the invention also relates to the salts of such compounds, their preparation, intermediates for preparing them and drugs containing them.

Abstract: This invention relates to the process for the preparation of 2-amino 7-nitro benzothiazoles of formula (I) ##STR1## consisting in a) nitrating a derivative of formula (II) ##STR2## and b) reacting the compound of formula (III) ##STR3## so obtained with caustic ammonia.