Table 1.
Deprotection for 2 h at rt, followed by solvent removal and cross-coupling for 12 h at 70 °C.
Yield determined by 1H NMR versus 1,3,5-trimethoxybenzene as an internal standard.
The substrate was prepared by Cs2CO3-catalyzed diboration in THF/methanol and the solvent evaporated prior to subjection to cross-coupling.