Fig. 4: The substrate scope of oxygen-mediated cross-coupling of luteolin and flavones.
From: Oxygen mediated oxidative couplings of flavones in alkaline water

A luteolin as a radical precursor and acceptor, and related products, with ORTEP representations for compounds 2b and 2e. B B-catechol flavones as radical precursors. All yields were isolated and selectivity was determined by HPLC analysis. brsm = yields based on the recovery of starting materials. R = H if not specified.