Beilstein J. Org. Chem.2021,17, 1849–1938, doi:10.3762/bjoc.17.126
using nonprecious Fe and Cu catalysis have been described by Sutherland and co-workers in 2020 (Scheme 32B and C) [165]. Benzofurans are important scaffolds present in several bioactive compounds, such as balsaminoneA (91, antipruritic activity), xylarianaphthol-1 (92, anticancer activity), and
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Graphical Abstract
Scheme 1:
Schematic overview of transition metals studied in C–H activation processes.
Beilstein J. Org. Chem.2020,16, 2026–2031, doi:10.3762/bjoc.16.169
Sharna-kay Daley Nadale Downer-Riley Department of Chemistry, The University of the West Indies, Mona, Jamaica 10.3762/bjoc.16.169 Abstract The application of oxidative dimerization for the biomimetic synthesis of balsaminoneA and ellagic acid is described. BalsaminoneA is synthesized via the
oxidative dimerization of 1,2,4-trimethoxynaphthalene under anhydrous conditions using CAN, PIDA in BF3·OEt2 or PIFA in BF3·OEt2 in 7–8% yields over 3 steps. Ellagic acid is synthesized from its biosynthetic precursor gallic acid, in 83% yield over 2 steps.
Keywords: balsaminoneA; biomimetic synthesis
) [17] and violet-quinone (3) [18] (Figure 1).
Similar to those natural products, the biomimetic synthesis of balsaminoneA (4) and ellagic acid (5) can be attained using oxidative dimerization reactions, based on their proposed biosynthesis (Scheme 1 and Scheme 2) [19][20]. These pathways, which start
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Graphical Abstract
Figure 1:
Selected natural products synthesized via oxidative dimerization.