Treatment of 1,3-diformylazulene (1) with 1.2 equiv. of alpha,omega -alkane
diamines (3 and 4) and tris(2-aminoethyl)amine (5a) in ethanol for 24 h at
room temperature gave tetaraazaazulenocoronands (2 and 9) and octaazaazulen
ocryptand (10) in one-pot procedure in good yields.