55854-60-9Relevant articles and documents
Structural development of canthin-5,6-dione moiety as a fluorescent dye and its application to novel fluorescent sensors
Yokoo, Hidetomo,Ohsaki, Ayumi,Kagechika, Hiroyuki,Hirano, Tomoya
, p. 5872 - 5879 (2016/09/07)
Canthin-5,6-dione is a common structure of the fluorescent natural products amarastelline A and nigakinone. Here, we synthesized various derivatives, and studied their fluorescence properties. The effects of substituent groups at the N3-, 4- and 10-positions were clarified. N3-Substitution influenced the solvent-dependent fluorescent change by modulating tautomerization between canthin-5,6-dione and the 5-hydroxy-6-one form. 10-Substitution also influenced the fluorescence, especially in aqueous solution, in combination with N3-substitution. Among the synthesized compounds, 5 showed an ‘OFF-ON-OFF’-type fluorescence change with increase of pH, and therefore served as a novel fluorescent sensor for a specific range of pH. Our findings suggest that canthin-5,6-dione should be useful as a fluorophore moiety for fluorescent labeling of biomolecules and for development of fluorescent probes and sensors.
Synthesis and antitumor activity of javacarboline derivatives
Yoshino, Hiroshi,Koike, Kazuo,Nikaido, Tamotsu
, p. 281 - 293 (2007/10/03)
Syntheses of 12H-pyrido[2,1-a]-[β-carbolin-5-ium bromides (15-27) and 11H-pyrrolo[2,1-a]-β-carbolines (32-35), structurally related to the tetracyclic alkaloid javacarboline (1) have been achieved via 2 steps routes starting from the respective β-carbolines. Their synthetic compounds showed potent antitumor activities against P-388 murine leukemia cells and PC-6 human lung carcinoma cells.