Polycyclic aminopyridine compounds which are acetylcholinesterase inhibitors, process for preparing them and their use
First Claim
1. Polycyclic aminopyridine compounds of general Formula I ##STR26## and their pharmaceutically acceptable salts, in which:
- R is hydrogen, alkyl, aralkyl, or acyl;
R1 and R2 are, independently, hydrogen, alkyl, aralkyl, alkoxy, alkoxycarbonyl, amino or amino substituted with one or two alkyl, aralkyl or acyl groups, m and n are independently 1, 2 or 3;
X is a bond between two carbons, an oxygen or sulphur atom, a group N--R3 --in which the group R3 has one of the meanings defined about for R--or an alkylene or alkenylene bridge containing from 1 to 5 carbon atoms and which may contain one or more substituents R4 --which are, respectively, hydrogen, lower alkyl, alkenyl or alkylidene having one to four carbon atoms with a linear or branched chain, phenyl, phenyl substituted with one or more lower alkyl groups having one to four carbon atoms, lower alkoxy groups having one to four carbon atoms or halogen groups, aralkyl, lower alkoxy containing from one to four carbon atoms, and hydroxyl--and when X is an alkenylene group, the latter may be fused to a saturated or unsaturated carbocyclic ring system, it being possible for the ring to be substituted with one or more groups R5 --which are lower alkyl or lower alkoxy having one to four carbon atoms, or halogen;
Y is an alkenylene bridge containing from 3 to 5 carbon atoms and which may contain one or more substituents R4 as defined above; and
##STR27## p being an integer which is 3 or 4, q being an integer from 1 to 3 inclusive, and r being an integer from 1 to 4 inclusive, and R6 and R7 being substituents which are individually hydrogen, halogen, lower alkoxy or lower alkyl.
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Abstract
New polycyclic aminopyridine compounds which are acetylcholinesterase inhibitors, process for preparing them and their use. The polycyclic aminopyridine compounds correspond to the formula ##STR1## in which the various radicals have the meanings stated in the specification. The process for preparing these compounds is characterized in that ketones of general formula (II) are reacted with aminonitriles of general formula (III) and, if necessary, the compounds of formula (I) are alkylated, aralkylated or acylated, or alternatively the corresponding keto precursor is reduced. The compounds of the general formula (I) are especially suitable for the preparation of medicaments against memory disorders such as senile dementia or Alzheimer'"'"'s disease.
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Citations
14 Claims
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1. Polycyclic aminopyridine compounds of general Formula I ##STR26## and their pharmaceutically acceptable salts, in which:
- R is hydrogen, alkyl, aralkyl, or acyl;
R1 and R2 are, independently, hydrogen, alkyl, aralkyl, alkoxy, alkoxycarbonyl, amino or amino substituted with one or two alkyl, aralkyl or acyl groups, m and n are independently 1, 2 or 3;
X is a bond between two carbons, an oxygen or sulphur atom, a group N--R3 --in which the group R3 has one of the meanings defined about for R--or an alkylene or alkenylene bridge containing from 1 to 5 carbon atoms and which may contain one or more substituents R4 --which are, respectively, hydrogen, lower alkyl, alkenyl or alkylidene having one to four carbon atoms with a linear or branched chain, phenyl, phenyl substituted with one or more lower alkyl groups having one to four carbon atoms, lower alkoxy groups having one to four carbon atoms or halogen groups, aralkyl, lower alkoxy containing from one to four carbon atoms, and hydroxyl--and when X is an alkenylene group, the latter may be fused to a saturated or unsaturated carbocyclic ring system, it being possible for the ring to be substituted with one or more groups R5 --which are lower alkyl or lower alkoxy having one to four carbon atoms, or halogen;
Y is an alkenylene bridge containing from 3 to 5 carbon atoms and which may contain one or more substituents R4 as defined above; and
##STR27## p being an integer which is 3 or 4, q being an integer from 1 to 3 inclusive, and r being an integer from 1 to 4 inclusive, and R6 and R7 being substituents which are individually hydrogen, halogen, lower alkoxy or lower alkyl. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 14)
- R is hydrogen, alkyl, aralkyl, or acyl;
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10. A process for obtaining polycyclic aminopyridine compounds of general Formula I ##STR31## and their pharmaceutically acceptable salts, in which:
- R is hydrogen, alkyl, aralkyl, or acyl;
R1 and R2 are, independently, hydrogen, alkyl, aralkyl, alkoxy, alkoxycarbonyl, amino or amino substituted with one or two alkyl, aralkyl or acyl groups;
m and n are independently 1, 2 or 3;
X is a bond between two carbons, an oxygen or sulphur atom, a group N--R3 --in which the group R3 has one of the meanings defined about for R--or an alkylene or alkenylene bridge containing from 1 to 5 carbon atoms and which may contain one or more substituents R4 --which are, respectively, hydrogen, lower alkyl, alkenyl or alkylidene having one to four carbon atoms with a linear or branched chain, phenyl, phenyl substituted with one or more lower alkyl groups having one to four carbon atoms, lower alkoxy groups having one to four carbon atoms or halogen groups, aralkyl, lower alkoxy containing from one to four carbon atoms, and hydroxyl--and when X is an alkenylene group, the latter may be fused to a saturated or unsaturated carbocyclic ring system, it being possible for the ring to be substituted with one or more groups R5 --which are lower alkyl or lower alkoxy having one to four carbon atoms, or halogen;
Y is an alkenylene bridge containing from 3 to 5 carbon atoms and which may contain one or more substituents R4 as defined above; and
##STR32## p being an integer which is 3 or 4, q being an integer from 1 to 3 inclusive, and r being integer from an 1 to 4 inclusive, and R6 and R7 being substituents which are individually hydrogen, halogen, lower alkoxy or lower alkyl, the said process wherein ketones of general Formula (11) ##STR33## are reacted with the aminonitriles of general formula (III) ##STR34## in which general formulae (II) and (III) A, R1 and R2, X, Y, m and n have the meanings defined above, and, if necessary, when it is desired to obtain compounds in which R is other than hydrogen, the compounds of general structure (I) in which R is hydrogen are subjected to alkylation, aralkylation or acylation;
or, when it is desired to obtain compounds in which R4 is an endo hydroxyl group, the corresponding keto precursor in which R4 is an oxo group is subjected to reduction;
thereafter, if so desired, to form a pharmaceutically acceptable acid addition salt, a basic compound obtained is reacted with a suitable acid. - View Dependent Claims (11, 12)
- R is hydrogen, alkyl, aralkyl, or acyl;
Specification