The palladium-catalysed copper-free Sonogashira coupling of isoindoline nitroxides: a convenient route to robust profluorescent carbon–carbon frameworks
作者:Daniel J. Keddie、Kathryn E. Fairfull-Smith、Steven E. Bottle
DOI:10.1039/b806963h
日期:——
intermediate for this coupling, giving acetylene-substituted isoindolinenitroxides in high yield. Subsequent reaction of the deprotected ethynyl nitroxide 12 with iodinated polyaromatics furnished novel aromatic nitroxides with extended-conjugation. Such nitroxides have been described as profluorescent, as their quantum yields are significantly lower than those of the corresponding diamagnetic derivatives