Trans-Selective Radical Silylzincation of Ynamides

Recent progress towards gold-catalyzed synthesis of N-containing tricyclic compounds based on ynamides

The recent advances in the gold-catalyzed construction of N-containing tricycles based on ynamides are reviewed by highlighting their specificity and applicability, and the mechanistic rationale.

Regioselective iodoamination of terminal ynamides for the synthesis of α-amino-β,β-diiodo-enamides

We developed the intermolecular iodoamination of terminal ynamides for the synthesis of α-amino-β,β-diiodo-enamides.

A Silver(I)-Catalyzed Intramolecular Ficini's [2 + 2] Cycloaddition Employing Ynamides

An intramolecular [2 + 2] cycloaddition using N-sulfonyl substituted ynamides tethered to an enone motif is described here. This thermally driven [2 + 2] cycloaddition manifold can be catalyzed effectively using AgNTf₂, and represents the first examples of an intramolecular Ficini reaction.

Development of zinc alkyl/air systems as radical initiators for organic reactions

This paper reports a series of comparative experiments on the activity of carbon- and oxygen-centred radical species in a model reaction of the radical addition of THF to imines mediated by a series of zinc alkyl/air reaction systems. The study strongly contradicts the notion that generally R˙ radicals are the initiating species in organic reactions mediated by R n M/air systems, and simultaneously demonstrates that oxygen-centred radical species are the key intermediates responsible for the initiation process. In addition, a new efficient RZn(L)/air initiating system for radical organic reactions exampled by a model reaction of radical addition of THF to imines is developed. Moreover, the isolation and structural characterization of the first zinc alkylperoxide supported by a carboxylate ligand, [Zn4(μ3-OOtBu)3(μ4-O)(O2CEt)3]2, as well as the novel octanuclear zinc oxo(alkoxide) aggregate with entrapped O-THF species, [Zn4(μ4-O)(μ3-2-O-THF)(O2CEt)5]2, provide clear mechanistic signatures for the mode of function of the RZn(O2CR')/air system.