Ring Construction Strategies in Synthesis Database

Fierz-David, H.E. Blangey, L. The Fundamental Processes of Dye Chemistry, Interscience Publishing New York, 1949, pp. 224, 225, 228, 314. 

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Veitch, G.E. Beckmann, E. Ley, S.V. Angew. Chem. Int. Ed. 2009, 48, 1317. Left-hand side of molecule as mentioned earlier Right-hand side of molecule  

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