Low-valent cobalt complexes can promote intramolecular (3 + 2) cycloadditions of alkyne-tethered cyclopropenes to provide bicyclic systems containing highly substituted cyclopentadienyl moieties with electronically diverse functional groups. The adducts can be easily transformed into new types of CpRh(III) and CpIr(III) complexes, which show catalytic activity in several relevant transformations. Preliminary computational (DFT) and experimental studies provide relevant information on the mechanistic peculiarities of the cobalt-catalyzed process and allow us to rationalize its advantages over the homologous rhodium-promoted reaction.

中文翻译：

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环丙烯系链炔烃的钴催化 (3 + 2) 环加成：双环环戊二烯基体系及其 CpM 配合物的多功能获取


低价钴配合物可以促进炔系环丙烯的分子内（3 + 2）环加成，以提供含有高度取代的环戊二烯基部分和电子多样化官能团的双环系统。该加合物可以很容易地转化为新型的 CpRh(III) 和 CpIr(III) 配合物，在一些相关的转化中表现出催化活性。初步计算（DFT）和实验研究提供了有关钴催化过程的机械特性的相关信息，并使我们能够合理化其相对于同系铑促进反应的优势。