Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A cyclization of δ-(iodoacetoxy)-α,β-unsaturated ketones using iodotrimethylsilane involved a selective 1,4-addition of the acetate subunit to the enone and furnished δ-lactones in good yield. ... A 1,4-cyclization of α-iodoacetates to enones by iodotrimethylsilane affords δ- ...