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Benzoquinoline amines – Key intermediates for the synthesis of angular and linear dinaphthonaphthyridines

A systematic study on the condensation reaction of 2,4-dichlorobenzo[h]quinoline and naphth-1-ylamine in the presence of CuI as catalyst to functionalised mono- and di-substituted (naphthalen-1-yl)benzo[h]quinoline amines was described. Subsequently these mono- and di-substituted amines on polyphosphoric acid catalysed cyclisation reaction with aromatic/ heteroaromatic carboxylic acids led to the construction of angular and linear aromatic/ heteroaromatic substituted dinaphthonaphthyridines in good yields. | Benzoquinoline amines – Key intermediates for the synthesis of angular and linear dinaphthonaphthyridines