Abstract Oxacalix [4] aromatics comprised of terphenylene units have been synthesized by cyclooligomerization of 5′-tert-butyl-1, 1′: 3′, 1 ″-terphenyl-4, 4 ″-diol (1) and electron- deficient meta-dihalogenated benzene and heterocycles. Single-crystal X-ray analysis revealed that oxacalix [2] terphenylene [2] pyrazine 13 adopts a chair conformation, forming a molecular cavity to trap an ethyl acetate guest molecule in the solid state. 1, 3-Alternate ...
