Abstract
Coumarins and 2-quinolones (1), having a 4-azido-3-benzyl-moiety, can easily by cyclized by thermo- or photolysis to 3,4-fused quino-coumarins and quino-2-quinolones (2,3).
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Stadlbauer, W. Synthese von chinolin-kondensierten 2-Chinolonen und Cumarinen via Azidoverbindungen. Monatsh Chem 118, 1297–1300 (1987). https://doi.org/10.1007/BF00816872
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DOI: https://doi.org/10.1007/BF00816872