Regioselective synthesis and metallation of tributylstannylfluoropyrazines. Application to the synthesis of some new fluorinated liquid crystals diazines. Part 34

Starting from fluoropyrazine, a general synthetic route including metallation and palladium-catalyzed cross-coupling reactions is described to access to rod-like alkylaryl or diarylpyrazines. Among them, some have liquid crystalline properties.