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DOI: 10.1055/s-0031-1289561
Understanding and Modulating Indolyne Regioselectivities
Publication History
Publication Date:
25 October 2011 (online)
Abstract
Heterocyclic arynes hold much promise for applications in modern synthetic chemistry. One particular class of hetarynes is those derived from the indole heterocycle (i.e., indolynes). Indolynes can be generated under mild fluoride-based reaction conditions using silyltriflate precursors. Indolyne-trapping experiments provide access to benzenoid-substituted indoles in a controlled manner with synthetically useful yields. Regioselectivities can be predicted prior to experiments using simple calculations, ultimately allowing for the modulation of selectivities by careful design. This strategy has enabled a concise synthesis of indolactam V.
Key words
arynes - indoles - regioselectivity - total synthesis - indolynes
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References and Notes
A Reaxys search reveals that over 100,000 bioactive indole-containing compounds have been discovered. See ref. 31.
28The B3LYP/6-31G(d) geometry-optimization studies of indolynes could also be carried out using MacSpartan, computations for simple hetarynes are typically complete within 10 min.
31Reaxys, version 1.0.8822; Elsevier Properties SA: Frankfurt, 2011.