The synthesis and spectral properties of modified cytidine analogues are described here. To confer fluorescent properties, the cytidine fluorophore was extended by a cinnamyl moiety at the cytidine 5-position, (analogues 1a–c), or extended by a phenyl-imidazolo ring, (analogues 3a–d). Those compounds were synthesized via the Suzuki–Miyaura coupling reaction and via condensation of 5-amino-cytidine