Abstract Acylation of 4-cyclopentylaniline (I) with chloracetyl chloride, 3-chloropropionyl chloride, 4-chlorobutyryl chloride and 2-bromo-4-methylvaleryl bromide gave the halogenoacyl derivatives IV-VII out of which the first two were subjected to substitution reactions with diethylamine and piperidine. The N-(aminoacyl) derivatives VIII-XI obtained were reduced with lithium aluminium hydride to the N-(aminoalkyl) derivatives XII and XV. ...