Novel N-(bicyclic heterocyclyl)-4-piperidinamines

Abstract

Novel N-(bicyclic heterocyclyl)-4-piperidinamines having anti-histamimic and serotonin-antagonistic properties which are useful in the treatment of allergic diseases.

What is claimed is: 
     
       1. A piperidine of the following formula (III-a): ##STR40## wherein A is a bivalent radical having the formula (III-a):   .[.--CH═CH--CH═CH--                                (a).].       --N═CH--CH═CH--                                    (b)       .[.--CH═N--CH═CH--                                 (c)       --CH═CH--N═CH--                                    (d) or       --CH═CH--CH═N--                                    (e).].     wherein one or two hydrogen atoms in said .[.radicals (a)-(e).]. .Iadd.radical (b) .Iaddend.may, each independently from each other, be replaced by halo, lower alkyl, lower alkyloxy, trifluoromethyl or hydroxy;   R is a member selected from the group consisting of hydrogen and lower alkyl;   R 1  is a lower alkyl substituted with methyl substituted furanyl;   R 2  is a member selected from the group consisting of hydrogen, lower alkyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, .[.--CO--.]. .Iadd.(lower alkyl)--CO-- .Iaddend.and Ar 2  -lower alkyl; and wherein Ar 2  is a member selected from the group consisting of phenyl being optionally substituted with up to three substitutents each independently selected from the group consisting of halo, hydroxy, nitro, cyano, trifluoromethyl, lower alkyl, lower alkyloxy, lower alkylthio, mercapto, amino mono- and di(lower alkyl)amino, carboxyl, lower alkyloxycarbonyl and (lower alkyl)-CO. .[.     
     
     
       2.  The piperidine of claim 1 wherein A is a bivalent radical having the formula:   --CH═CH--CH═CH--                                   (a)..]. .[.3. The piperidine of claim 1 wherein A is a bivalent radical having the formula:       --N═CH--CH═CH--                                    (b)..]. .[.4. The piperidine of claim 1 wherein A is a bivalent radical having the formula:       --CH═N--CH═CH--                                    (c)..]. .[.5. The piperidine of claim 1 wherein A is a bivalent radical having the formula:       --CH═CH--N═CH--                                    (d)..]. .[.6. The piperidine of claim 1 wherein A is a bivalent radical having the formula:     
     
     
       --CH═CH--CH═N--                                    (e)..]. 7. The 
     
     
        piperidine of claim 1 wherein R is hydrogen. 8. The piperidine of claim 1 
     
     
        wherein R is lower alkyl. 9. The piperidine of claim 1 wherein R 2  is hydrogen.