35822-60-7Relevant academic research and scientific papers
Gold-catalyzed oxa-povarov reactions for the synthesis of highly substituted dihydrobenzopyrans from diaryloxymethylarenes and olefins
Pagar, Vinayak Vishnu,Tseng, Chang-Chin,Liu, Rai-Shung
, p. 10519 - 10526 (2014)
Oxa-Povarov reactions involving readily available diaryloxymethylarenes and aryl-substituted alkenes are reported. Their [4+2] cycloadditions were efficiently catalyzed by IPrAuSbF6 (IPr=1,3-bis(diisopropylphenyl) imidazol-2-ylidene) with high diastereoselectivity. Product analysis revealed that the reactions likely proceed by a stepwise ionic mechanism, because both E- and Z-configured β-methylstyrene gave the same cycloadducts in the same proportions.
