Abstract
This review article summarizes progress in N-alkylations, N-alkenylations, N-and C-arylations and hetarylations, halogenations, as well as organometallic chemistry of pyrazoles mainly achieved during the last decade. In addition, the generation and chemistry of N-heterocyclic carbenes of pyrazole (pyrazol-3-ylidenes) and remote N-heterocyclic carbenes of pyrazole (pyrazol-4-ylidenes) are described.
Keywords: Alkylation, Alkenylation, Arylation, Halogenation, Nitration, Sulfonation, Suzuki-Miyaura reaction, Regioselectivity, Metalorganic reactions, Cyclic allenes, Pyrazolium salts, Rearrangement, hetarylations, bromoacetanilides, diethylaminopropyl (DEAPTS) groups
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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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