Total Synthesis of (+)-Lophirone H and Its Pentamethyl Ether Utilizing an Oxonium–Prins Cyclization AbasHossay LinsdallSean M. MambouryMathias RzepaHenry S. SpiveyAlan C. 2017 The first total synthesis of (+)-lophirone H (<b>1</b>) and its pentamethyl ether <b>29</b>, featuring an oxonium–Prins cyclization/benzylic cation trapping reaction, is described.