Diastereoselective Oxyselenylation of 1,n-Diolefins Utilizing PET Generated [PhSeSePh]+. as an Electrophilic Species: An Efficient and General Strategy for the Synthesis of α,α′-trans-Dialkyl Cyclic Ethers - Pandey, Ganesh; Sochanchingwung, R; Tiwari, Shashi Kant (Synlett, 1999)