Ru(ii)-catalyzed C-H alkynylation of ferrocenes with bromoalkynes directed by carboxamide groups

An efficient synthesis of ferrocene derivatives via Ru(ii)-catalyzed direct selective C-H mono-alkynylation with easily accessible bromoalkyne compounds under the influence of weakly coordinating amide groups has been presented. This protocol provides an approach for accessing various ferrocene derivatives with easily transformed alkynes using carboxamides, giving alkynylated ferrocenes in up to 89% yield.

Automated summary

An efficient synthesis of ferrocene derivatives has been achieved via Ru(ii)-catalyzed direct selective C-H mono-alkynylation using easily accessible bromoalkyne compounds and weakly coordinating amide groups. This method allows for the synthesis of alkynylated ferrocenes with high yields (up to 89%) by utilizing carboxamides for easy alkyne transformation.