Abstract Reduction of 4-cyclopentylacetophenone oxime gave the title compound II which was transformed by a combination of acylation, alkylation, reduction and substitution reactions to compounds III-XI. 2-Benzylcyclopentanone oxime was reduced to 2- benzylcyclopentylamine (XVI) and converted by a reaction with methylmagnesium iodide and by the following Ritter reaction to the formamide derivative XVIII which was used as ...