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A new benzannulation reaction and its application in the multiple parallel synthesis of arylnaphthalene lignans

Flanagan, S. R., Harrowven, D. C. and Bradley, M. (2002) A new benzannulation reaction and its application in the multiple parallel synthesis of arylnaphthalene lignans Tetrahedron, 58, (30), pp. 5989-6001. (doi:10.1016/S0040-4020(02)00616-6).

Record type: Article


A new aromatic annulation reaction based on sequential Horner-Emmons and Claisen condensation reactions is described. The method is high yielding and provides a rapid entry to arylnaphthalenes. The lignan natural products justicidin B 1, retrojusticidin B 2, taiwanin C 3, justicidin E 4, chinensin 5 and retrochinensin 6 have all been synthesised in good overall yield using this protocol, demonstrating its potential in multiple parallel synthesis. The selective oxidation of diols 34-36 to the corresponding retrolactones with barium manganate(VI) is also noteworthy.

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Published date: 22 July 2002
Keywords: annulation, claisen condensation, combinatorial chemistry, homer-emmons, lignans, natural productsdiels-alder reaction, intramolecular cannizzaro reaction, modifyingantirheumatic drugs, 1-arylnaphthalene lignans, antiviral activity, reaction sequence, cascade process, justicidin-b, taiwanin-c, lactones


Local EPrints ID: 19735
ISSN: 0040-4020
PURE UUID: e388822f-a283-4f59-928c-3dbecb3eedc6

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Date deposited: 17 Feb 2006
Last modified: 17 Jul 2017 16:30

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Author: S. R. Flanagan
Author: D. C. Harrowven
Author: M. Bradley

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