The enantioselectivereactions of lithiated benzyl trifluoromethyl sulfones with a substoichiometric amount of a bis(oxazoline) and various aldehydes is disclosed. The products were formed with excellent diastereo- and enantioselectivities. Fluorination of the sulfone with N-fluorobenzenesulfonimide and a stoichiometric amount of a bis(oxazoline) gave products with extremely high enantioselectivities
公开了锂化的苄基三氟甲基砜与亚化学计量的双(恶唑啉)和各种醛的对映选择性反应。形成的产物具有优异的非对映选择性和对映选择性。用N-氟苯磺酰亚胺和化学计量的双(恶唑啉)对砜进行氟化,得到的产物具有极高的对映选择性(高达99%ee; ee =对映体过量)。确认对映选择性反应通过动态热力学拆分途径进行。