A versatile synthesis of diverse 3,4-fused cinnolines via the base-catalysed condensation of 2-amino-2′-nitrobiaryls
2007
Slevin, Åsa | Koolmeister, Tobias | Scobie, Martin
Benzo[c]cinnolines, thieno[3,2-c]cinnolines, pyrido[3,2-c]cinnolines and the previously undescribed quinoxalino[6,7-c]cinnoline ring system are conveniently prepared by a short synthetic route comprised of Suzuki coupling, base-catalysed cyclisation and deoxygenation. The use of tandem borylation–Suzuki coupling further extends the scope of this process to include highly substituted benzo[c]cinnolines.
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