作者:Daniele Giallombardo、Adam C. Nevin、William Lewis、Christopher C. Nawrat、Russell R.A. Kitson、Christopher J. Moody
DOI:10.1016/j.tet.2013.12.055
日期:2014.2
A synthesis of the naturally occurring xanthone toxyloxanthoneB 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
Regioselective Reactions of Highly Substituted Arynes
作者:Pamela M. Tadross、Christopher D. Gilmore、Pradeep Bugga、Scott C. Virgil、Brian M. Stoltz
DOI:10.1021/ol1000796
日期:2010.3.19
The fully regioselective reactivity of four new highly substituted silyl aryl triflate aryne precursors in aryne acyl-alkylation, acyl-alkylation/condensation, and heteroannulation reactions is reported. The application of these more complex arynes provides access to diverse natural product scaffolds and obviates late-stage functionalization of aromatic rings.
Aryne Acyl-Alkylation in the General and Convergent Synthesis of Benzannulated Macrolactone Natural Products: An Enantioselective Synthesis of (−)-Curvularin
作者:Pamela M. Tadross、Scott C. Virgil、Brian M. Stoltz
DOI:10.1021/ol100335y
日期:2010.4.2
A general approach for the synthesis of benzannulated macrolactone natural products utilizing an aryne acyl-alkylation reaction is described. Toward this end, the total syntheses of the natural products (−)-curvularin, curvulin, and (−)-diplodialide C are reported. Furthermore, the aryne insertion technology has enabled the rapid conversion of simple diplodialide natural products to curvularin, thereby