With the focus of designing new fluorescent probes, four new 3-hydroxy-chromone derivatives bearing benzofuran and naphthofuran groups were synthesized. They show bathochromic absorption shifts relative to 3-hydroxyflavone with the ability of retention to
[Hino, Kazuyuki; Nakajima, Kiyohiko; Kawahara, Miyoko; Kiyota, Issui; Sekiya, Hiroshi Bulletin of the Chemical Society of Japan, 2011 , vol. 84, # 11 p. 1234 - 1236]
![2-[4-(dimethylamino)phenyl]-3-hydroxychromen-4-one Structure](https://image.chemsrc.com/caspic/289/101442-35-7.png)