Abstract
The synthetic utility of enolates in the heterocycles synthesis constitutes the main topic of this review. Appropriate enolates, in a number of synthetic approaches, are easily formed in situ from a variety of carbonyl compounds (aldehydes, ketones, amides, etc.) and used for the ring construction of (poly)substituted heterocycles. Often, the synthesis of five-membered rings such as isoxazoles, triazoles, pyrazoles, etc. has been performed by using these intermediates through a two-step or even by one pot procedures. The selectivity and the versatility of enolates intermediates will be discussed, with particular attention to those methodologies useful for preparation of heterocycle containing pharmacologically active molecules.
Keywords: Five-membered rings, Enolates, 1, 3-Dipoles, Regioselective Cycloadditions, Isoxazoles, Pyrazoles, Triazoles, Furans.
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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