Unexpected One-Pot Method to Synthesize Spirofluorene-9,9‘-xanthene Building Blocks for Blue-Light-Emitting Materials

reaction: see text An unexpected one-pot synthetic approach toward spirofluorene-9,9'-xanthene (SFX) under excessive MeSO(3)H conditions has been developed. The key step involves a thermodynamically controlled cyclization reaction. Blue-light-emitting materials based on SFX building blocks that exhibit high thermal stability have also been synthesized.