Unexpected One-Pot Method to Synthesize Spiro[fluorene-9,9‘-xanthene] Building Blocks for Blue-Light-Emitting Materials

An unexpected one-pot synthetic approach toward spiro[fluorene-9,9‘-xanthene] (<b>SFX</b>) under excessive MeSO<sub>3</sub>H conditions has been developed. The key step involves a thermodynamically controlled cyclization reaction. Blue-light-emitting materials based on <b>SFX</b> building blocks that exhibit high thermal stability have also been synthesized.