1,n-Enynes are a versatile class of unsaturated hydrocarbons that find broad applications in the synthetic community of natural products, biologically active structures and functional materials. Typical methods for the transformations… Click to show full abstract
1,n-Enynes are a versatile class of unsaturated hydrocarbons that find broad applications in the synthetic community of natural products, biologically active structures and functional materials. Typical methods for the transformations of 1,n-enynes include the radical-mediated [2+2+m] annulation reaction as they are particularly efficient accesses to functionalized polycyclic compounds. We herein highlighted recent process in the radical-mediated [2+2+m] annulation of 1,n-enynes, including [2+2+1] and [2+2+2] modes, for the construction of five- to six-membered-ring-fused polycyclic scaffolds. Meanwhile, the mechanisms for these transformations were described.
               
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