Cobalt-mediated [2+2+2] cycloaddition of alkynyl boronates to indole and pyrrole double bonds.

[摘要]：The complex [CpCo(C2H4)2] facilitates the [2+2+2] cycloaddn. of borylalkynes to N-(4-pentynoyl)indole and -pyrrole to furnish heterocyclofused borylcyclohexadienes regioselectively.

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