5,10-Dihydroindeno[1,2-]indole has served as an important starting precursor for BARAC-fluor reagent in medicinal chemistry. Herein, an unprecedented -TsOH assisted intramolecular C2-arylation of NH-indoles via C(sp)-CN/C(sp)-H coupling, offering a series of 5,10-dihydroindeno[1,2-]indoles with moderate to good yields, has been showcased under redox-neutral conditions. Furthermore, successful scalability and synthetic applications highlight the practical nature of the method.
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