Rhodium‐Catalyzed [2+2+2] Cycloaddition–Aromatization of 1,6‐Diynes with Cyclic Enol Ethers at Room Temperature

Abstract

Abstract A cationic rhodium(I)/BINAP [2,2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl] complex is capable of catalyzing the [2+2+2] cycloaddition–aromatization of 1,6‐diynes with cyclic enol ethers (2,3‐dihydrofuran and dihydropyran) at room temperature to produce the corresponding aryl alkanol derivatives in good yields. In this process, a conjugated dihydrofuran showed a significantly higher reactivity than a nonconjugated one.