Abstract
Betainic pyridinium alkaloids and analogs are members of the four major classes of heterocyclic mesomeric betaines, i.e. conjugated (CMB), cross-conjugated (CCMB), pseudo-cross-conjugated heterocyclic mesomeric betaines (PCCMB), and conjugated Nylides and thus offer the possibility of detailed comparisons of the types of conjugation. The chemistry of these systems is surveyed.
Keywords: mesomeric betaines, alkaloids, 3- hydroxypyridine, pyridin-n-oxide, picolinic acid
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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