N-(PYRROL-1-YL)PYRIDINAMINES, A PROCESS FOR THEIR PREPARATION AND THEIR USE AS MEDICAMENTS

摘要

There are disclosed novel compounds of the formula where n is 0 or 1; R is hydrogen or loweralkyl; R1 is hydrogen, loweralkyl, halogen, cyano, loweralkanoyl, arylloweralkanoyl, aroyl,-CH(OH)R4,-C(OH)R4R5 or -CH20R5, -CH=CR6R7,-CH=CHCN,-CH=CHOCH3,-CH=CHCO2C2H5,-CH= , -CH=, -CH=CH , -CH=CH , -CH=CH, -CH2CHR6R7, -CH2CH2CN, -CH2CH2OCH3,-CH2CH2CO2C2H5, -CH2- , , -CH2-, , -CH2CH2 , or -CH2CH2 , R4 being hydrogen, loweralkyl, arylloweralkyl or aryl , R5 being loweralkyl, aryl or arylloweralkyl, R6 being hydrogen or loweralkyl and R7 being hydrogen, loweralkyl or aryl; R2 is hydrogen, loweralkyl, loweralkenyl, loweralkynyl, -CH2CO2C2H5, arylloweralkyl, phenyl, nitrophenyl, cyanophenyl, trifluoromethylphenyl, aminophenyl, loweralkanoylaminophenyl, loweralkoxycarbonyl, arylloweralkoxycarbonyl, aryloxycarbonyl, loweralkylaminocarbonyl, arylloweralkylaminocarbonyl, arylaminocarbonyl, alkanoyl, arylloweralkanoyl, aroyl, alkenoyl, alkynoyl,-CH2C?CCH2-NR'R",-CH2CH=CHCH2-NR'R", or -CH2CH2CH2CH2-NR'R", R' and R" being independently loweralkyl or -NR'R" taken as a whole being or ; and R3 is hydrogen, NO2, NH2, halogen, loweralkanoylamino, arylloweralkanoylamino, aroylamino or loweralkyl; with the proviso that when n is 0, R2 is phenyl, R3 is hydrogen and the pyridine moiety is 2-pyridinyl, R and R1 may not be 2-methyl and 5-methyl; or pharmaceutically acceptable acid addition salts thereof, which are useful for enhancing memory, methods for synthesizing them, pharmaceutical compositions comprising an effective memory enhancing amount of such a compound and a method of treating a patient in need of memory enhancement which comprises administering such a compound to the patient.