Abstract
Heterocycles are ubiquitous in biological compounds and methods to functionalize them have been of long standing interest. Reactions of early transition metal-carbon bonds with heterocycles are important in two major areas: (1) activation and functionalization of heterocycles and (2) ring-opening of aromatic heterocycles. In the first area, metalcarbon bonds determine ortho-metalation and insertion of unsaturated substrates to yield functionalized heterocycles. In the latter area, metal-element multiple bonds become important and provide the driving force for ring-opening reactions. This review will focus on reactions of nitrogen-containing heterocycles. Early transition metals are defined as elements belonging to groups III-V, the lanthanides, and the actinides; the reactivity of complexes featuring the metal in its highest oxidation state (d0fn electron count) and a carbon-based ligand will be described.
Keywords: Transition Metal, N-Heterocycles, ortho-metalation, lanthanides, oxidation state, ligand, Complexes
Call for Papers in Thematic Issues
Catalytic C-H bond activation as a tool for functionalization of heterocycles
The major topic is the functionalization of heterocycles through catalyzed C-H bond activation. The strategies based on C-H activation not only provide straightforward formation of C-C or C-X bonds but, more importantly, allow for the avoidance of pre-functionalization of one or two of the cross-coupling partners. The beneficial impact of ...read more
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