Synthesis of Alkylated Benzo[2,1-b:3,4-b']dithiophenes by Annulative Coupling and Their Direct Arylation under Palladium Catalysis

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• The annulative coupling of 3,3′-diiodo-2,2′-bithiophene with internal alkynes efficiently proceeds in the presence of a palladium catalyst to afford the corresponding benzo[2,1-<I>b</I>:3,4-<I>b</I>′]dithiophene derivatives. The dithiophenes also undergo palladium-catalyzed direct arylation with aryl bromides at the 2- and 7-positions selectively.

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公益社団法人 日本化学会 | 論文

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