Synthesis and crystal structure of 1,3-bis(5-formylpyrrol-2-yl)benzene and its conversion to a macrocyclic derivative

This report details the synthesis and characterization of a new diformyl pyrrole derivative 2 and its macrocyclic derivative 3. The new compounds were characterized by FT-IR, ¹³C NMR, and ¹H NMR spectroscopies and via mass spectrometric analysis. The structure of 2 in the solid state was determined using X-ray diffraction methods (monoclinic, P2₁/c, a = 17.3760(7), b = 4.9719(2), c = 15.5374(5) Å, β = 105.892(2)°, V = 1291.00(9) ų, and Z = 4). The molecular structure is stabilized by N-H...O and C-H...O intermolecular hydrogen bonds. The present bisformylpyrrole derivative 2 provides a new precursor that may be useful in the synthesis of new, functional macrocyclic systems.