Abstract: Isoquinoline-4-carboxylic acid derivatives of the formula I ##STR1## in which m, n, R.sup.1, R.sup.2, R.sup.3, A and X have the meansings indicated, and physiologically acceptable acid addition salts thereof, a process for their preparation, pharmaceutical formulations based on these compounds and the use thereof as antiarrythmic agents.

Abstract: New isoquinoline derivatives of the general formula ##STR1## and their physiologically acceptable salts, which exert pharmacological actions on the central nervous system and the heart circulation system, a process for the preparation of these compounds, medicaments containing them, and their use as neuroleptic, antihypertonic and antiarrhythmic agents, are described.

Abstract: 1-Phenylisoquinoline derivatives of the general formula I ##STR1## and a process for their preparation are described. They act on the central nervous system, in particular as antidepressants.

Abstract: What is disclosed are prostacyclin analogs of the general formula I ##STR1## which have a more specific action and/or a longer action than the naturally occurring prostacyclin PGI.sub.2, as well as intermediate products for their preparation and a process for their preparation. The compounds of formula I are distinguished by inhibitory action on thrombocyte aggregation and by relaxation of the vascular walls, in particular of the coronary arteries. They can thus be used as medicaments.

Abstract: What is disclosed are compounds of the formula ##STR1## which are structurally related to natural prostaglandins and a process for their manufacture. The compounds have valuable pharamacological properties and, therefore, they can be used as medicaments.

Abstract: Isoquinolines of the formula ##STR1## of which representative compounds are such as 3-N-methylpiperazino-1-phenyl-isoquinoline-4-aldehyde, 3-N-methylpiperazino-1-(2-fluorophenyl)-isoquinoline-4-aldehyde, or 3-N-[3-(4-fluoro-benzoyl)-propyl]-piperazino-1-phenyl-isoquinoline-4-aldeh yde and medicaments containing the isoquinolines which are useful as antidepressants.

Abstract: Isoquinolines of the formula ##STR1## in which R.sub.1 is piperidino, piperazino or piperazino N-substituted thereof by alkyl of 1 to 4 carbon atoms, alkylene of 1 to 4 carbon atoms wherein said alkylene is substituted in turn by fluorobenzoyl, or CHO; R.sub.2 is phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, halogen, amino or nitro; and R.sub.3 is hydrogen or halogen, a process for their preparation and medicaments containing the isoquinolines, especially the use of said medicaments as antidepressants.

Abstract: Isoquinoline derivatives of the formula ##STR1## wherein the substituent is such as chlorine or bromine; R.sub.1 is phenyl etc.; R.sub.2 is hydrogen, halogen etc.; R.sub.3 is e.g. aminoalkyl and their use as medicaments, in particular as antidepressants.

Abstract: Isoquinoline-4-aldehydes of the formula ##STR1## in which X denotes bromine or chlorine, R.sub.1 is phenyl optionally mono- or disubstituted by halogen, hydroxy, nitro, amino, or amino substituted by one or two aliphatic, cycloaliphatic or aromatic hydrocarbon radicals having from 2 to 18 carbon atoms, the nitrogen atom possibly being included in a heterocyclic ring, acyl amino, alkyl or alkoxy each having from 1 to 6 carbon atoms, benzoyloxy, or trifluoromethyl, or is pyridyl or thienyl;R.sub.2 is hydrogen, halogen, hydroxy, alkyl or alkoxy having from 1 to 6 carbon atoms, nitro, amino, benzyloxy, methylene dioxy or ethylene dioxy andm is 1 or 2;which are effective in the treatment of spasms and as tranquilizers.

Abstract: Cyclohexanedione-(1,4)-tetramethyl diketal of the formula ##STR1## is obtained by catalytic hydrogenation of p-benzoquinone tetramethyl diketal in a basic medium, at a temperature of from about -10.degree. to +150.degree. C. The product gives cyclohexanedione-(1,4), on acid hydrolysis, which is a valuable starting product for various syntheses, for example for tetracyanoquinodimethane, a desired compound in the field of semiconductors.Hydroquinone dimethyl ether, which is a valuable intermediate for the dyestuff preparation, is obtained from cyclohexanedione-(1,4)-tetramethyl diketal by catalytic dehydrogenation.

Abstract: Cyclohexanedione-(1,4)-tetramethyl diketal of the formula ##STR1## is obtained by catalytic hydrogenation of p-benzoquinone tetramethyl diketal in a basic medium, at a temperature of from about -10.degree. to +150.degree. C. The product gives cyclohexanedione-(1,4), on acid hydrolysis, which is a valuable starting product for various syntheses, for example for tetracyanoquinodimethane, a desired compound in the field of semiconductors.Hydroquinone dimethyl ether, which is a valuable intermediate for the dyestuff preparation, is obtained from cyclohexanedione-(1,4)-tetramethyl diketal by catalytic dehydrogenation.