A series of mesogenic compounds consisting of 6-amino-1,3-dimethyluracil and 4-(alkyloxy)biphenyl-4-carboxylate interlinked by iminophenylcarboxylate was synthesised. The molecular structures of these compounds were substantiated by FT-IR, 1H NMR and C-13 NMR along with elemental analysis. The mesomorphic properties were investigated by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). The result indicated that the compounds exhibited mesophase except in compounds 3a and 3g, when n = 6 and 18. Focal-conic or Schlieren domains to the smectic A (SmA) phases were found in compounds when the alkyl chain Cn-1H2n-1(n = 8, 10 and 12).