Abstract
An overview of the key achievements concerning C–C bond-forming processes with diazines
(pyridazines, pyrimidines, and pyrazines) and benzodiazines (cinnolines, phthalazines,
quinazolines, and quinoxalines) under transition-metal-catalyzed C–H activation is
presented. The focus is on examples in which C–H functionalization takes place in
the diazine or benzodiazine core because of the relevance of these compounds in material
science and as active pharmaceutical ingredients. These metal-catalyzed protocols
benefit from the biased reactivity of the C–H bonds targeted or from the presence
of a rationally designed directing group proximate to the C–H bond to be functionalized.
As such, innovative alkylations, alkenylations, alkynylations, arylations, and carboxylations
are accomplished within such skeletons in a step- and atom-economy fashion.
1 Introduction
2 Transition-Metal-Catalyzed C–H Alkylation of Diazines
3 Transition-Metal-Catalyzed C–H Alkynylation of Diazines
4 Transition-Metal-Catalyzed C–H Alkenylation of Diazines
5 Transition-Metal-Catalyzed C–H Arylation of Diazines
6 Transition-Metal-Catalyzed C–H Carboxylation of Diazines
7 Conclusion
Key words
diazines - C–H activation - arylation - alkenylation - alkylation - metal catalyst