Chemistry of Four-Membered Cyclic Nitrones. 2. 1,3-Dipolar Cycloaddition Reactions with Electron-Deficient Acetylenes and Conversion of the 1,3-Dipolar Adducts into Pyridine Derivatives

Article abstract of DOI:10.1021/jo00144a005

The four-membered cyclic nitrones (2,3-dihydroazete 1-oxides) 1a-d react with dimethyl acetylenedicarboxylate by 1,3-dipolar cycloaddition to give the dihydroazeto<1,2-b>isoxazole derivatives 2a-d; cyclic nitrone 1e reacts in a similar way via the not iso