Ionic iodocarbocyclization reactions involving intramolecular attack of a carbon nucleophile at a double bond activated by an electrophilic iodinating reagent are efficient processes to construct carbocyclic frameworks. Iodocarbocyclization involving 1,3-dicarbonyl compounds, such as 4-alkenyl and 4-alkynyl malonates, was extensively studied by Taguchi and co-workers. 1 The related ionic selenocarbocyclization of α-seleno ketones was investigated by Toru's ...