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Abstract
A modular approach to prepare tri- and tetracyclic carbazoles by a sequential [3+2]heteroannulation is described. First, op-timization of a Pd-catalyzed Buchwald-Hartwig amination followed by C/N-arylation in a one-pot process is established. Second, mechanistic analyses identified the origins of chemo- and regioselective sequential control of both bond-forming steps. Finally, the substrate scope is demonstrated by the preparation of a range of tri- and tetracyclic carbazoles, including expedient access to several natural products and anti-cancer agents.
Supplementary materials
Title
Supplementary Material for: A Chemo- and Regioselective Tandem [3+2]Heteroannulation Strategy for Carbazole Synthesis: Synergizing Two Mechanistically Distinct Bond-Forming Processes
Description
Procedures describing the synthesis and characterisation of small molecules.
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Title
Supplementary Characterisation date for: A Chemo- and Regioselective Tandem [3+2]Heteroannulation Strategy for Carbazole Synthesis: Synergizing Two Mechanistically Distinct Bond-Forming Processes
Description
NMR, MS and X-ray crystallographic data for the small molecule synthetic components of the manuscript.
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