New Heteroarenes: Synthesis and Spectroscopic Properties of Indolizino[6,5,4,3‐aij]quinoline (‘Ullazine’) and of some Derivatives The synthesis, 1H‐NMR, 13C‐NMR and electronic absorption spectra of indolizino[6,5,4,3‐aij]quinoline (6a), a new π‐excess heteroarene, and of three 3,9‐disubstituted derivatives are described.
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Heinz Balli (1983) studied this question.
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