Abstract: There are disclosed compounds of the formula, where n is 0, 1 or 2; A is where X in each occurrence is independently hydrogen, halogen, loweralkyl, hydroxy, nitro, loweralkoxy, amino, cyano, trifluoromethyl or methylthio; Y in each occurrence is independently hydrogen, halogen, loweralkyl, hydroxy, nitro, loweralkoxy, amino, cyano, trifluoromethyl or methylthio; K is N or CH; m is 1 or 2; k is 1 or 2; R1 and R2 are independently hydrogen, loweralkyl, or aryl except that when R1 is or aryl, R2 is hydrogen, or alternatively R1+R2 taken together with the carbon atom to which they are attached form a cyclopentane, cyclohexane, cycloheptane, pyran, thiopyran, indan or piperidine ring; R3 and R4 are independently hydrogen or loweralkyl, or alternatively R3+R4 taken together with the carbon atom to which they are attached form a cyclopentane, cyclohexane, cycloheptane, pyran, thiopyran, pyrrolidine or piperidine ring, the term aryl sig

Abstract: There are disclosed various substituted 4-amino-3-pyridinol compounds of the formula below, ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are as defined in the specification, which are useful for alleviating various memory dysfunctions characterized by a cholinergic deficit such as Alzheimer's disease.

Abstract: There are disclosed various substituted 4-amino-3-pyridinol compounds of the formula below, ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are as defined in the specification, which are useful for alleviating various memory dysfunctions characterized by a cholinergic deficit such as Alzheimer's disease.

Abstract: There are disclosed various substituted 4-amino-3-pyridinol compounds of the formula below, ##STR1## where R.sub.1, R.sub.2 and R.sub.3 are as defined in the specification, which are useful for alleviating various memory dysfunctions characterized by a cholinergic deficit such as Alzheimer's disease.

Abstract: A compound selected from the following formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, X, m and n are as defined in the specification having antipsychotic activity.

Abstract: This invention relates to compounds of the formula ##STR1## wherein X is halogen, hydroxy, (C.sub.1 -C.sub.6)alkoxy, amino or trifluoromethyl; andY is --CN or --NR.sup.1 R.sup.2 ;wherel is an integer of 0, 1 or 2;m is an integer of 0, 1 or 2;n is an integer of 2, 3 or 4, except when Y is CN, in which case n can also be 1;R.sup.1 is hydrogen, (C.sub.1 -C.sub.6)alkyl or (C.sub.1 -C.sub.6)alkylcarbonyl;R.sup.2 is hydrogen, (C.sub.1 -C.sub.10)alkylcarbonyl, (C.sub.3 -C.sub.12)cycloalkylcarbonyl, hydroxy-(C.sub.1 -C.sub.6)alkylcarbonyl, phenylcarbonyl, thienylcarbonyl or benzothienylcarbonyl;orR.sub.1 and R.sup.2 together with nitrogen atom to which they are attached form the ring ##STR2## where A is C.dbd.O or CH.sub.2 ;andB is C.dbd.O, CHOH, CH.sub.2 or CH.sub.2 CH.sub.2 ; andZ is halogen, hydroxy, (C.sub.1 -C.sub.6)alkoxy, amino or trifluoromethyl p is 0 or 1; and pharmaceutically acceptable acid addition salts thereof, pharmaceutical compositions thereof and their use for the treatment of psychoses.