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Concise Total Synthesis of Lundurines A-C Enabled by Gold Catalysis and a Homodienyl Retro-Ene/Ene Isomerization. | LitMetric

AI Article Synopsis

  • - The total synthesis of lundurines A-C has been successfully achieved in both racemic (mixed) and enantiopure (single form) variations in 11-13 and 12-14 steps, respectively.
  • - This synthesis was performed without the need for protection or deprotection of functional groups, simplifying the process.
  • - Key techniques used included a new tandem double condensation/Claisen rearrangement, gold(I)-catalyzed alkyne hydroarylation, cyclopropanation through a [3 + 2] cycloaddition, and a unique olefin migration method that enhances efficiency in the final stages.

Article Abstract

The total synthesis of lundurines A-C has been accomplished in racemic and enantiopure forms in 11-13 and 12-14 steps, respectively, without protection/deprotection of functional groups, by a novel tandem double condensation/Claisen rearrangement, a gold(I)-catalyzed alkyne hydroarylation, a cyclopropanation via formal [3 + 2] cycloaddition/nitrogen extrusion, and a remarkable olefin migration through a vinylcyclopropane retro-ene/ene reaction that streamlines the endgame.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4819460PMC
http://dx.doi.org/10.1021/jacs.6b01428DOI Listing

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