Access to 4-Oxazolidinones: A (3+2) Cycloaddition Approach

The novel reactivity of in situ generated azaoxyally1 cation intermediates with a variety of carbonyl compounds is reported to construct 4-oxazolidinones motifs with good yields and diastereoselectivities. This simple and efficient (3 + 2) cycloaddition method provides direct access to potential bioactive compounds.