Synthesis and Reactivity of 5‑Heterotruxenes Containing Sulfur or Nitrogen as the Heteroatom

This paper presents an alternative
path for the synthesis of 5-thiatruxene
and the synthetic approach for 5-azatruxene not known so far. A new
method for 5-thiatruxene improves the overall reaction yield from
17.5 to 22.6%, diminishes the synthesis time and costs by reducing
synthetic steps from 5 to 2, and simplifies the isolation of intermediate
and final products. The overall reaction yield for 5-azatruxene is
32.4%. The typical reactivity of both aromatic systems is also demonstrated.
Recent research results suggest the use of 5-thiatruxene as the acceptor
subunit of soluble blue emitters.