N-aryl-n-(4-(1-heterocyclic alkyl)piperidinyl)amide and pharmaceutical composition and use of such compound

NEW MATERIAL: A compd. represented by formula I [wherein R is a (substd.) phenyl, R 1 is a 2-6C alkyl, alkenyl or alkoxy, R 2 is a pyrrolylalkyl, a pyrazolylalkyl, an imidazolyl(thio)alkyl, a thienyloxyalkyl, a thienylhydroxyalkyl, a benzoimidazolylalkyl or a heterocyclicalkyl of a naphthalenecarboxamidylalkyl and R 3 is an alkoxycarbonyl or an alkoxymethyl]. EXAMPLE: N-(Phenyl)-N-[1-(2-(1H-pyrrol-1-yl)ethyl)-4-methoxycarbonyl-4- piperidinyl]propanamide. USE: A narcotic like analgesic compsn. having an immediate effect, a short acting period and very strong analgesic action. PROCESS: For example, a compd. represented by formula II (R 4 is H) and a compd. represented by formula III (X is a halide) or formula IV are reacted to obtain the compd. represented by formula I. COPYRIGHT: (C)1990,JPO