Jul-Aug 1989 Novel Chromophoric Heterocycles Based on Maleimide and Naphthoquinone Alan R. Katritzky*, Wei-Qiang Fan, Qiao-Ling Li and Shibli Bayyuk Department of Chemistry, University of Florida, Gainesville, Florida, 32611, USA Received December 21, 1987 l-Phenyl-3,4-dichloromaleimide, l-rt-propyl-3-bromomaleimide, and 2,3-dichloro-l,4-naphthoquinone have been condensed with various mono- and bis-nucleophiles to yield a range of novel ...