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Paper | Regular issue | Vol 60, No. 8, 2003, pp.1805-1810
Published online, 7th July, 2003
DOI: 10.3987/COM-03-9792
A Simple Preparative Method of N-Arylindigos and Substitution Effect in UV/Visible Absorption

Yukihiro Matsumoto and Hitoshi Tanaka*

*Department of Optical Science and Technology, Faculty of Engineering, University of Tokushima, Minamijosanjima-cho, Tokushima 770-8506, Japan


N-Aryl- and N, N’-diarylindigos were prepared by refluxing corresponding aryl iodides or bromide with indigo in o-dichlorobenzene. Variation of their UV/visible spectra with the ring-substitution was discussed on the basis of the captodative and steric effects.