Abstract
Applications of the retro Diels-Alder reaction (cycloreversion) under mild conditions for the laboratory preparation of heteromonocycles or condensed-ring heterocycles are reviewed. A new method utilizes diendo- or diexo-3-aminonorbornene-2-carboxylic acids and their derivatives for the formation of heterocyclic ring systems which are difficult to access by other routes or which can be prepared only in complicated multi-step procedures. The synthesis of substituted 1,3-dienes (e.g. furan derivatives) and O,N- or N,N-heterocycles (oxazoles, isoxazoles, pyrazoles, imidazoles, triazoles, pyrimidinones, oxazinones, pyridazinones etc) are discussed.
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
Chemistry and Biology of Carbohydrates
Carbohydrates are one of the most abundant natural products and are considered to be extremely important biomolecules for their ever-increasing impact on chemistry and biology. Their role in several important biological processes, notably energy storage, transport, modulation of protein function, intercellular adhesion, malignant transformation, signal transduction, viral, and bacterial cell ...read more
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