Metal-Catalyzed Annulations through Activation and Cleavage of C−H Bonds.

Autor: Gulías, Moisés, Mascareñas, José Luis
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Zdroj: Angewandte Chemie International Edition; 9/5/2016, Vol. 55 Issue 37, p11000-11019, 20p
Abstrakt: The exponential increase in the number of catalytic transformations that involve a metal-promoted activation of hitherto considered inert C−H bonds is promoting a fundamental change in the field of synthetic chemistry. Although most reactions involving C−H activations consist of simple functionalizations or additions, recent years have witnessed an upsurge in related transformations that can be formally considered as cycloaddition processes. These transformations are particularly appealing from a synthetic perspective because they allow the conversion of readily available substrates into highly valuable cyclic products in a rapid and sustainable manner. In many cases, these annulations involve the formation of metallacyclic intermediates that resemble those proposed for standard metal-catalyzed cycloadditions of unsaturated precursors. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index