[3+2] Cycloaddition of N‐benzylazomethine Methylide with Various Arylidene‐Azolones

Spirocyclic skeletons are highly attractive for design of biologically active compounds. [3+2] Cycloaddition of N ‐benzylazomethine methylide with various arylidene‐azolones achieve to synthesize promising series of substituted spirocyclic structures. Systematic study of the scope and stereochemical outcome of [3+2]‐cycloaddition was performed.