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Beilstein J. Org. Chem. 2011, 7, 1255–1260, doi:10.3762/bjoc.7.146
Graphical Abstract
Figure 1: Some representative dihydroxybenzofuran derived natural products.
Scheme 1: Retrosynthetic analysis of 4,n-dimethoxy-substituted benzo[b]furans.
Scheme 2: Deprotonative zincation of 3-haloanisoles 1.
Beilstein J. Org. Chem. 2011, 7, 786–793, doi:10.3762/bjoc.7.89
Scheme 1: Formation of 3-(inden-2-yl)indoles 3 and 4 from 3-propargylindoles. Energy barriers (kcal/mol) for ...
Scheme 2: Tandem 1,2-indole migration/aura-Nazarov cyclization from 3-propargylindoles bearing an aromatic su...
Figure 1: ORTEP diagram for 4a. Ellipsoids are shown at 30% level (hydrogen atoms are omitted for clarity).
Scheme 3: Comparison of the reactivity of C-2 substituted indoles 1j and 1k. Conditions: a) (Ph3P)AuCl/AgSbF6...
Scheme 4: Reactions of 3-propargylindoles 1l and 1m with bulky alkyl substituents at the propargylic position...