Annulative Coupling of Sulfoxonium Ylides with Aldehydes and Naphthols or Coumarins: Easy Access to Fused Dihydrofurans.

We present a novel, metal- and additive-free method for the robust synthesis of dihydrofuran-fused naphthalenes and coumarins. This approach utilizes the annulative coupling of sulfoxonium ylides with aldehydes, naphthols, or coumarins at ambient temperature. The method exhibits broad substrate compatibility, accommodating various functional groups on sulfoxonium ylides and naphthol or coumarin derivatives and resulting in good to high yields of the desired products.

I-Mediated Site-Selective C-H Functionalization: Access to -Amino-Substituted Unsymmetrical Benzils and Quinoxalines from Sulfoxonium Ylides.

An I-mediated approach for selective C-H functionalization of unprotected aniline derivatives for synthesizing benzils and quinoxaline derivatives from sulfoxonium ylides has been described. Aniline derivatives and sulfoxonium ylides ornamented with different functional groups showed good compatibility. They afforded the corresponding products with moderate to high yields via a mild and simple procedure.