been converted into enantiomericallypure endocyclic 2-alkenyl sulfoximines. Titanated derivatives thereof undergo highlydiastereoselective γ-hydroxy-alkylation reactions with various amino aldehydes yielding isomerically pure vinyl sulfoximines, which can be cyclized by N-deprotection. The resulting heterobicyclic systems are expected to be interesting scaffolds for the synthesis of topological mimetics