Syntheses of 3-[(Alkylamino)methylene]-6-methylpyridine-2,4(1H,3H)-diones, 3-Substituted 7-Methyl-2H-pyrano[3,2-c]pyridine-2,5(6H)-dione Fluorescence Probes, and Tetrahydro-1H,9H-2,10-dioxa-9-azaanthracen-1-ones. -Various bicyclic and tricyclic heterocycles are synthesized by condensation and ring-closing reactions, e.g. Knoevenagel and lactonization reaction. Compounds (IX) and (XI) possess interesting fluorescence properties in MeOH and can be useful as fluorescence probes for biochemical research. -(PRIOR, A. M.; GUNARATNA, M. J.; KIKUCHI, D.; DESPER, J.; KIM, Y.; CHANG, K.-O.; MAEZAWA, I.; JIN, L.-W.; HUA*, D. H.; Synthesis 46 (2014) 16, 2179-2190, http://dx.