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N {2 [(1 R Cyclopropyl)methyl]prop 2 enyl} N,N dimethylamines were prepared in 80-90% yields by the reaction (5 h, 23-25°C) of propargylamines R-C≡C-CH 2 NMe 2 (where R = alkyl, Ph) with a system of reactants CH 2 I 2 -Et 3 Al taken in the molar ratio [propargylamine] : [Et 3 Al] : [CH 2 I 2 ] = 1 : 6 : 6. In the case of phenyl substituted propargyl amine, N ({1 [(1 phenylcyclopropyl)methyl]cyclopropyl}methyl) N,N dimethylamine is selectively formed in 76% yield upon the elongation of the reaction time to 4 days.