On the Chemistry of Pyrrole Pigments LXXIX: The Structural Influence of Strongly Demanding Residues of 10-Substituted 1,19-Bilindiones

Article abstract of DOI:10.1007/BF00809647

1,19-Bilindiones bearing a phenanthryl, mesityl, tert-butyl, and isopropyl substituent at the C-10 position were synthesized.Conformational analysis using 13C- and 1H-NMR spectroscopic techniques and absorption spectroscopy together with semiempirical rev