Abstract: Novel compounds of the formula ##STR1## where the phenyl ring can also contain a nitrogen atom instead of a CH group, R.sub.1 is C.sub.2 -C.sub.6 -alkenyl, C.sub.2 -C.sub.6 -alkynyl, hydroxy, C.sub.1 -C.sub.6 -alkoxy, C.sub.3 -C.sub.6 -alkenyloxy, C.sub.3 -C.sub.6 -alkynyloxy, C.sub.2 -C.sub.6 -alkanoyloxy, benzoyloxy, morpholinocarbonyloxy, C.sub.1 -C.sub.6 -alkyloxycarbonyloxy, C.sub.1 -C.sub.6 -alkylaminocarbonyloxy, C.sub.1 -C.sub.6 -dialkylaminocarbonyloxy or the group -Alk-A, where Alk represents C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -hydroxyalkyl or C.sub.3 -C.sub.6 -cycloalkyl and the symbol A represents hydrogen or other substituents.R.sub.2, R.sub.3 and R.sub.4 represent various substituents, where R.sub.1 may also be hydrogen, when R.sub.2 is the group ##STR2## and R.sub.5 represents phenyl, C.sub.1 -C.sub.4 -alkoxyphenyl or diphenylmethyl and R.sub.3 and R.sub.4 are hydrogen and their salts. The compounds provide anti-allergic, anti-asthmatic, anxiolytic and hypotensive effects.

Abstract: Compounds corresponding to the formula ##STR1## are disclosed, wherein Alk represents a C.sub.2 -C.sub.5 -alkylene groups optionally substituted by a hydroxy group and Ar represent an optionally substituted phenyl, naphthyl, tetrahydronaphthyl, indanyl or indenyl radical or a monocyclic or condensed bicyclic or tricyclic heterocyclic radical which is optionally substituted, the heterocyclic radical consisting of individual rings having 5 or 6 members and optionally containing from 1 to 4 hetero atoms, and the acid addition salts thereof. A process for producing these compounds is also disclosed. These substituted aminoalkyl guanidines block the .beta.-receptors of the adrenergic nerve system, and also reduce blood pressure.

Abstract: Basic substituted alkyl theophylline derivatives of the formula ##STR1## in which Alk is a straight or branched chain alkylene group with 2 to 4 carbon atoms and R is hydrogen or a methyl group are produced by catalytic hydrogenation of compounds of the formula ##STR2## where the phenolic hydroxyl groups and/or the secondary basic nitrogen atom can contain protective groups using as the solvent a compound of the formula ##STR3## where R', R" and R'" are the same or different and are alkyl groups of 1 to 2 carbon atoms and R' together with R'" can also be an alkylene bridge with 3 to 4 carbon atoms and in a given case the protective groups present are split off.