4‐Dimethylaminopyridine‐Mediated [3+3] Cycloaddition of Aza‐oxyallyl Cations and Nitrones

A new 4-dimethylaminopyridine (DMAP) mediated [3+3] cycloaddition of in situ generated aza-oxyallyl cations with nitrones is reported. This simple and efficient method delivers a series of new motifs in good to excellent yields under mild conditions. Furthermore, a 1.0 mmol scale reaction was performed in undiminished yield, demonstrating the practicality of this protocol for large-scale synthesis.