A nickel-based catalytic system has been developed for [2 + 2 + 2] cyclotrimerization of various alkynes, especially ynoates. This catalytic system enables facile construction of substituted aromatic compounds in excellent yields with high regioselectivity.
![Graphical abstract: Efficient and regioselective nickel-catalyzed [2 + 2 + 2] cyclotrimerization of ynoates and related alkynes](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C3OB41872C&imageInfo.ImageIdentifier.Year=2013)
S. K. Rodrigo, I. V. Powell, M. G. Coleman, J. A. Krause and H. Guan, Org. Biomol. Chem., 2013, 11, 7653 DOI: 10.1039/C3OB41872C
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