Verfahren zur Herstellung von Dihydrotiazinen

摘要

Novel compounds of the Formula I or IA and acid addition salts thereof, wherein R1 represents a hydrogen atom or a lower alkyl, lower alkenyl, lower alkoxyalkyl, lower cycloalkyl, phenyl or naphthyl optionally substituted by lower alkyl, lower aralkyl, lower alkaralkyl, lower alkoxyaralkyl, or lower haloaralkyl; R2 represents a di - lower alkylamino, di - lower alkenylamino, N - lower alkyl - lower alkenylamino, aziridinyl, azetidinyl, pyrrolidiny, piperidino, hexahydroazepinyl, heptamethyleneimino, octamethyleneimine or morpholino radical, each of said heterocyclic radicals being optionally substituted on carbon atoms thereof by 1 to 3 lower alkyl radicals, inclusive, the nitrogen atom of the radical R2 being the point of attachment of R2 to the triazine ring, and R3 represents a hydrogen atom or a lower alkyl, lower alkenyl, lower cycloalkyl, phenyl or naphthyl radical optionally substituted by lower alkyl radicals, wherein the lower alkyl and lower alkoxy radicals have 1 to 8 carbon atoms, lower alkenyl radicals have 2 to 8 carbon atoms, and lower cycloalkyl radicals have 3 to 8 carbon atoms optionally substituted by C1- 8 alkyl radicals; and the aryl part of lower aralkyl, lower alkaralkyl, lower alkoxyaralkyl and lower haloaralkyl radicals is a phenyl or naphthyl radical, are prepared by treating a triazine of the Formula II with a percarboxylic acid or, where R1, R2 and R3 represent radicals which do not contain a carbon-carbon double bond, by hydrogenating in the presence of a hydrogenation catalyst a compound of the Formula I wherein R1, R2 and R3 are as above defined with the proviso that at least one lower alkenyl group must be present, and optionally converting the product into an acid addition salt thereof. Triazines of the Formula II may be prepared by reacting a biguanide of the formula R2-C(= NH)-NH-C(= NH)-NHR3 with a carboxylic acid ester. Triazines of the Formula II may be prepared by replacing the chlorine atoms of a 2-R1-4,6-dichloro-1,3,5-triazine by the radicals -NHR3 and R2 successively, by known methods. 5 - Cyclohexyl - 1,1 - ethylene biguamide may be prepared by reacting ethyleneimine hydrochloride with 3-cyclhexyl-1 -cyanoguanidine. 1 - Allyl - 1 - methylbiguanide hydrochloride may be prepared by reacting N-methylallylamine hydrochloride with cyanoguanidine. Therapeutic compositions with antihypertensive, vasodilatory, antisecretory and central nervous system depressant properties in the forms of tablets, capsules, powders, pills, granules, syrups, elixirs, solutions, dispersions and suppositories for oral, parenteral or topical application, comprise compounds of the Formula I or IA, or an acid addition salt thereof, with a pharmaceutically acceptable carrier therefor.