Download 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. ... The synthesis of six-, seven- and eight-membered 3-oxo oxacycloalkenes by using ring-closing metathesis has been achieved from 1-(ω-alkenyloxy)-but-3-en-2-ones. ... 3-Oxo oxacycloalkenes were synthesized in good to excellent yields from 1-(ω-alkenyloxy)-but-3-en-2-ones.