Gold-catalyzed oxidative coupling of alkynes was developed as an efficient approach for the synthesis of challenging cyclic conjugated diynes (CCD). Compared with the classic copper-promoted oxidative coupling reaction of alkynes, this gold-catalyzed process exhibited a faster reaction rate due to rapid reductive elimination from the Au(III) intermediate. This unique reactivity thus allowed a challenging diyne macrocyclization to take place with high efficiency. Condition screening revealed an [(n-Bu)4N]+[Cl-Au-Cl] salt as the optimal pre- catalyst. Macrocycles with ring size between 13 and 28 atoms were prepared in moderate to good yields, which highlighted the broad substrate scope of this new strategy. Furthermore, cyclic conjugated diynes were engaged in the into polymer synthesis, which provided an unique external synthetic strategy for the polymer post-functionalization.

Gold-catalyzed oxidative coupling of alkynes toward the synthesis of cyclic conjugated diynes and its application on polymer post-functionalization

2019 Spring National Meeting

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