HIV Protease Inhibitor Part 1: Use of Evans’ Oxazolidinone in Intermolecular Diels-Alder Reaction en route to 3,4-Substituted Cyclohexanones - Crackett, Peter; Demont, Emmanuel; Eatherton, Andrew; Frampton, Christopher S; Gilbert, Jenny; Kahn, Irfan; Redshaw, Sally; Watson, William (Synlett, 2004)