Synthesis of toxyloxanthone BTools Giallombardoa, Daniele, Nevin, Adam C., Lewis, William, Nawrat, Christopher C., Kitson, Russell R.A. and Moody, Christopher J. (2014) Synthesis of toxyloxanthone B. Tetrahedron, 70 (6). pp. 1283-1288. ISSN 0040-4020 Full text not available from this repository.AbstractA synthesis of the naturally occurring xanthone toxyloxanthone B is described, in which the key step is the regioselective addition of a methyl salicylate to a substituted benzyne followed by cyclization of the intermediate aryl anion to form the xanthone, the regiochemistry of the aryne addition being confirmed by X-ray crystallography. Subsequent introduction of the pyran ring by [3,3]-rearrangement and deprotection completed the synthesis
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