Abstract: A process for producing an azacycloalkane derivative represented by the following general formula (II): ##STR1## wherein m is an integer of from 1 to 3, n.sub.2 is an integer of from 2 to 10, andR represents an alkyl group having 3 to 12 carbon atoms,characterized by reacting a 1-(n-alkenyl)-azacycloalkan-2-one represented by the following general formula (I): ##STR2## wherein m is an integer of from 1 to 3, and n.sub.1 is an integer of from 0 to 8,with an alkyl mercaptan in the presence of a radical initiator in an organic solvent, treating the reaction mixture thus obtained with a reducing agent in a water-containing organic solvent, and then purifying the treated mixture by distillation.

Abstract: A dibenz[b,e]oxepin derivative represented by the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 are each hydrogen, halogen, lower alkyl or alkoxy; one of R.sup.3 and R.sup.4 is lower alkoxy, and other is a group represented by the formula (II) ##STR2## wherein R.sup.5 is hydrogen or lower alkyl, A is hydroxyl, --O(CH.sub.2).sub.m --R.sup.6 (wherein m is an integer of 1-6, R.sup.6 is hydrogen, lower alkyl or alkoxy, cycloamino, or lower alkoxycarbonyl), cycloamino, di-lower alkylamino or --NH(CH.sub.2).sub.n --R.sup.7 (wherein n is an integer of 0-3, R.sup.7 is hydrogen, hydroxyl, phenyl, thiazole or cycloamino).