Abstract: A .beta.-carbolin-3-carboxylic acid derivative of the formula ##STR1## wherein: X is oxygen, sulphur or NR.sup.10, wherein R.sup.10 is hydrogen, C.sub.1-6 -alkyl, C.sub.1-6 -alkenyl, C.sub.3-7 -cycloalkyl or C.sub.3-7 -cycloalkenyl;R.sup.3 is (a) C.sub.1-10 -alkoxy, C.sub.1-10 -alkenyloxy, C.sub.6-10 -aryloxy, C.sub.7-11 -aralkoxy or C.sub.8-12 -aralkenyloxy, each optionally substituted with one or more hydroxy groups, halogen atoms, CF.sub.3 groups, C.sub.1-10 -alkoxy groups or C.sub.2-4 -alkenyloxy groups or each optionally substituted with an amino, di-C.sub.1-6 -alkylamino, C.sub.1-10 -alkoxycarbonyl or C.sub.1-10 -alkenyloxycarbonyl group; or (b) NR.sup.11 R.sup.12, wherein R.sup.11 and R.sup.12 are the same or different and each is (i) hydrogen, (ii) hydroxy, (iii) C.sub.1-10 -alkyl, (iv) C.sub.2-10 -alkenyl, (v) C.sub.6-10 -aryl, (vi) C.sub.7-11 -aralkyl, (vii) C.sub.8-12 -aralkenyl, (viii) C.sub.3-7 -cycloalkyl, or (ix) C.sub.

Abstract: .beta.-Carbolines of general Formula I ##STR1## wherein R.sup.3 is ##STR2## or --COOR", wherein R' is C.sub.1-3 alkyl or C.sub.3-6 cycloalkyl and R" is C.sub.1-4 alkyl; R.sup.4 is hydrogen, methyl, ethyl or methoxymethyl; and R.sup.A is ##STR3## wherein X is C.sub.1-12 straight-chain, branched-chain, saturated or unsaturated alkyl or a corresponding alkyl group with a CH.sub.2 -group substituted by a carbonyl group and R"" is one or more of fluorine, chlorine, bromine, or iodine, C.sub.1-3 alkyl, C.sub.1-3 alkoxy, C.sub.1-5 acyloxy, phenyl, C.sub.2-5 alkylenedioxy, trifluoromethyl, nitrilo, nitro or --NR.sup.IV R.sup.V wherein R.sup.IV and R.sup.V, which can be the same or different are hydrogen, C.sub.1-3 alkyl, C.sub.1-5 acyl or phenyl, or collectively with the amido nitrogen atom form a 3- to 6-membered hetero ring, which are prepared conventionally by esterifying a corresponding compound wherein R.sup.A is H or R.sup.

Abstract: .beta.-carbolin-3-carboxylic acid derivatives of the general formula ##STR1## wherein R.sup.1 is methyl, ethyl, n-propyl or iso-propyl, and whereinR.sup.2 is hydrogen, methyl, ethyl, n-propyl or iso-propyl, provided that R.sup.1 is not methyl, when R.sup.2 is hydrogen, are produced by different methods.The compounds are useful in psychopharmaceutical preparations, being antagoinists of benzodiazepines.

Abstract: New substituted .beta.-carbolines of formula I ##STR1## wherein R.sup.3 is hydrogen or a non-carboxyl based substituent, and R.sup.4-9 have various meanings,are valuable pharmaceutical products with long lasting action on the central nervous system.

Abstract: Novel substituted .beta.-carboline derivatives of Formula I ##STR1## wherein R.sup.3 is an oxadiazolyl residue of the formula ##STR2## wherein R.sup.5 stands for lower alkyl of up to 3 carbon atoms or an ester ##STR3## with R.sup.6 being hydrogen or lower alkyl of up to 3 carbon atoms, R.sup.4 is hydrogen, lower alkyl of up to 3 carbon atoms, or CH.sub.2 OR.sup.9 wherein R.sup.9 is lower alkyl of up to 3 carbon atoms,R.sup.A is phenyl or a hydrocarbon residue containing 2-10 carbon atoms which can be cyclic or acyclic, saturated or unsaturated, branched or unbranched, and which can optionally be substituted by oxo, formyl OH, O-alkyl of up to 3 carbon atoms or phenyl, and wherein, in a cyclic hydrocarbon residue, a CH.sub.2 -group can be replaced by oxygen,exhibit an effect on the central nervous system and thus are suitable as psychopharmaceuticals.

Abstract: .beta.-carboline derivatives of general Formula I ##STR1## wherein R.sup.3 is ##STR2## wherein R.sup.5 is C.sub.1-5 alkyl, R.sup.6 is lower alkyl, aralkyl, or alkoxyalkyl of up to 7 carbon atoms, and R.sup.7 and R.sup.8 are hydrogen C.sub.1-5 alkyl, or, collectively with the amido nitrogen atom, piperidino,R.sup.4 is hydrogen, C.sub.1-3 alkyl, or CH.sub.2 OR.sup.9 wherein R.sup.9 is C.sub.1-3 alkyl, atoms, andR.sup.A is --COOR.sup.10 ##STR3## wherein R.sup.10 is hydrogen, lower alkyl, alkoxyalkyl or alkenyl of up to 5 carbon atoms, or benzyl, or X is oxygen or sulfur, and R.sup.11 and R.sup.12 each are hydrogen, lower alkyl or alkenyl or, collectively with the amido nitrogen atom, represent a hetero ring, are prepared by conventional methods and exhibit, inter alia, an effect on the central nervous system and are suitable for use as psychopharmaceuticals.

Abstract: 3-Substituted beta-carbolines of the formula ##STR1## wherein R.sup.A is H, F, Cl, Br, I, NO.sub.2, CN, CH.sub.3, CF.sub.3, SCH.sub.3, NR.sup.16 R.sup.17 or NHCOR.sup.16,wherein R.sup.16 and R.sup.17 are the same or different and each is hydrogen or alkyl, alkenyl or alkynyl each of up to 6 C-atoms, aralkyl or cycloalkyl each of up to 10 C-atoms,or wherein R.sup.16 and R.sup.17 together form a saturated or unsaturated 3-7 membered heterocyclic ring;said compounds possess valuable psychotropic properties which make them useful for example as tranquilizers.

Abstract: Substituted 5H-pyrimido[5,4-b]indoles of Formula I ##STR1## wherein R.sup.2 is halogen; the oxadiazolyl group ##STR2## wherein R" is lower alkyl with up to 3 carbon atoms; C.sub.1-5 -alkyl, cycloalkyl, aralkyl, or aryl; OR.sup.I, SO.sub.n R.sup.I with n being 0, 1, or 2, or ##STR3## wherein R.sup.I is hydrogen, C.sub.1-5 -alkyl, cycloalkyl, aralkyl, or aryl; ##STR4## wherein R.sup.II and R.sup.III are hydrogen, C.sub.1-5 -alkyl, C.sub.3-5 -alkenyl, cycloalkyl, aralkyl, aryl, or, with the connecting N-atom, a 5- or 6-membered heterocyclic ring; andR.sup.A is hydrogen; the oxadiazolyl group ##STR5## wherein R" is lower alkyl with up to 3 carbon atoms; halogen, nitro, OR.sup.I, SO.sub.n R.sup.I with n being 0, 1, or 2, ##STR6## wherein R.sup.I is hydrogen, C.sub.1-5 -alkyl, cycloalkyl, aralkyl, or aryl; ##STR7## wherein R.sup.II and R.sup.III are hydrogen, C.sub.1-5 -alkyl, cycloalkyl, C.sub.3-5 -alkenyl, aralkyl, aryl, or, with the connecting N-atom, a 5- or 6-membered heterocyclic ring; orPO(OR).sub.

Abstract: New oxadiazolyl-imidazo-[1,4]benzodiazepine derivatives having benzodiazepine receptor activity have the formula ##STR1## R' is hydrogen, chlorine, fluorine or nitro in the 7- or 8-position, R.sup.1 is hydrogen or lower alkyl of up to 3 carbon atoms,R.sup.3 is the oxadiazolyl grouping of the formula ##STR2## wherein R" is lower alkyl with up to 3 carbon atoms and A B is a grouping of the formula ##STR3## wherein R.sup.5 is hydrogen or methyl and R'" is hydrogen or chlorine. The compounds possess valuable pharmacological properties. In particular, they act on the central nervous system and are suitable for use in psychopharmaceutical preparations.

Abstract: 3-substituted beta-carbolines of the formula ##STR1## wherein R.sup.C is hydrogen, lower alkyl, alkoxyalkyl of up to 6 C-atoms, cycloalkyl of 3-6 C-atoms, aralkyl of up to 8 C-atoms, or (CH.sub.2).sub.n OR.sup.20wherein R.sup.20 is alkyl of up to 6 C-atoms, cycloalkyl of 3-6 C-atoms or aralkyl of up to 8 C-atoms and n is an integer of 1 to 3;Y is oxygen, two hydrogen atoms or NOR.sup.1,wherein R.sup.1 is hydrogen, lower alkyl, aryl or aralkyl of up to 6 C-atoms, COR.sup.2, wherein R.sup.2 is lower alkyl of up to 6 C-atoms,or Y is CHCOOR.sup.3, wherein R.sup.3 is hydrogen or lower alkylor Y is NNR.sup.4 R.sup.5,wherein R.sup.4 and R.sup.5 can be the same or different and each is hydrogen, lower alkyl, C.sub.6-10 -aryl, C.sub.7-10 -aralkyl or CONR.sup.6 R.sup.7,wherein R.sup.6 and R.sup.7 can be the same or different and each is hydrogen or lower alkyl or R.sup.4 and R.sup.

Abstract: A .beta.-carbolin-3-carboxylic acid derivative of the formula ##STR1## has valuable pharmacological properties when administered to patients, e.g. humans as a drug, have been shown to possess interesting tranquilizing activity.