2-Styrenyl allenoates are converted into cyclopentene-fused dihydrocoumarins through phosphine-catalyzed regio- and diastereoselective [3 + 2] cycloadditions. Remarkably, changing the solvent from THF
An Ir(III)-catalyzed oxidative cyclization of benzoic acids with propargyl alcohols to give substituted isocoumarins in a highly regioselective manner is described. This protocol has a broad substrat
Four organic compounds based on substituted coumarin derivatives (1–4) have been synthesized and characterized by X-ray structural studies with a detailed analysis of Hirshfeld surface and fingerprint