Results Bicyclo [4.1. O] heptane (1) and bicyclo [3.1. 0] hexane (2) were selected as the starting cyclopropyl compounds. In the preparative experiment, the methanolic solution of 1 was oxidized at room temperature using tetraethylammonium p-toluenesulfonate as a supporting electrolyte. A carbon rod was used as the electrode and 2 F/mol of electricity was passed. The analysis of the reaction products indicated the formation of compounds 3a, ...