The following synthetic conversion can be obtained through oxymercuration–demercuration of alkenes.
Work Step by Step
1) Electrophilic attack of $ ^+Hg(OAc)$ forms a mercurinium ion. 2) Methoxide attacks the most substituted carbon and opens the ring to give an organomercurial ether. 3) Demercuration with $NaBH_4$ replaces the mercuric fragment with hydrogen to give an ether.