HETEROCYCLES FUSED TO TWO AROMATIC RINGS

In this chapter, diazines bearing fluoro or a-fluoroalkyl substituent at any carbon atoms of the heterocyclic ring, as well as their fused derivatives are discussed. The literature data are divided into two parts, which describe synthesis and chemical behavior of ring- and chain-fluorinated diazines (RFD and CFD respectively). It should be noted that only chain-fluorinated diazines having the fluorine atom at a position of the alkyl substituent are discussed, since more distant fluorine atoms have lesser effect on the chemistry of the corresponding heterocycles. Chain-fluorinated diazines with fluorine atoms or fluorine-containing substituents linked to the aromatic ring via heteroatoms are also beyond the scope of this literature survey. 

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