Rational Design, Green Synthesis, and Initial Evaluation of a Series of Full-Color Tunable Fluorescent Dyes Enabled by the Copper-Catalyzed N-Arylation of 6-Phenyl Pyridazinones and Their Application in Cell Imaging
pyridazinones were synthesized rationally by this methodology as full‐color tunable fluorescent agents (426–612 nm). The N2 position of pyridazinones was modified by different aryl group such as benzothiazole, N,N‐dimethylaniline, 3‐quinoline, 4‐isoquinoline and 2‐thiophene, resulting in a series of full‐color tunable fluorescent reagents. Meanwhile, the effects of electron‐donating and electron‐withdrawing