An
enantioselective synthesis of functionalized cyclohepta[b]indoles via Pd-catalyzed cyclopropane C–H activation followed
by olefination and indole–vinylcyclopropane rearrangement is
reported. The design of the chiral cyclopropane precursor was such
that both enantiomeric cyclohepta[b]indoles were
accessed from a single compound exhibiting a “hidden”
symmetry plane. The scope of the method was demonstrated by varying
the substituents on the cyclopropane as well as on the heterocycle
itself.
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