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Metal-free ring opening reactions of activated and unactivated aziridines with different silyl chalcogenides are described. Judicious tuning of the reaction conditions enables the synthesis of chiral enantioenriched N-Ts and N-Boc 1,2-mercaptoamines in good yields from the corresponding aziridines and bis(trimethylsilyl)sulfide. N-Protected and N-H unactivated aziridines are efficiently converted into the corresponding β-arylchalcogeno amines upon treatment with suitable arylchalcogenosilanes. The silicon-mediated ring opening reactions proceed with excellent regioselectivity and stereospecificity, allowing to access a wide array of synthetically and biologically valuable enantioenriched chalcogenoamines.

Mild and selective silicon-mediated access to enantioenriched 1,2-mercaptoamines and β-amino arylchalcogenides