Boraindenes as versatile precursors to benzannulated boron heterocycles

Chem. Sci., 2025, Accepted Manuscript DOI: 10.1039/D5SC08526H, Edge Article Nele Wieprecht, Ivo Krummenacher, Leonie Wüst, Maximilian Michel, Marco Neder, Andreas Häfner, Jordan Karg, Holger Braunschweig Five-membered boroles and their doubly benzannulated 9-borafluorene derivatives are established precursors for synthesizing a broad range of boron-doped heterocycles of broad applied interest. Extending this chemistry, we show that a...