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31. Synthesis of quinoline-fused 2-quinolones and coumarines via azido compounds (Organic azides in heterocyclic synthesis, 6)
Stadlbauer W., Monatsh.Chem. 118 (1987) 1297

Abstract: Coumarins and 2-quinolones 1, which possess a 4-azido-3-benzyl-moiety, can easily be cyclized by thermo- or photolyis to 3,4-fused quino-coumarins and quino-2-quinolones (2,3).


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