A Chemo- and Regioselective Tandem [3 + 2]Heteroannulation Strategy for Carbazole Synthesis: Combining Two Mechanistically Distinct Bond-Forming Processes
作者:Emma Campbell、Andrea Taladriz-Sender、Olivia I. Paisley、Alan R. Kennedy、Jacob T. Bush、Glenn A. Burley
DOI:10.1021/acs.joc.1c02943
日期:2022.4.1
A modular approach to prepare tri- and tetracyclic carbazoles by a sequential [3 + 2]heteroannulation is described. First, optimization of Pd-catalyzedBuchwald–Hartwigamination 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