Bi(OTf)3-catalysed prenylation of electron-rich aryl ethers and phenols with isoprene: a direct route to prenylated derivatives
作者:Katie E. Judd、Lorenzo Caggiano
DOI:10.1039/c1ob05365e
日期:——
Electron-rich aryl ethers and phenols react with isoprene (2-methylbuta-1,3-diene) in the presence of catalytic Bi(OTf)3 at 40 °C to afford the corresponding prenylated or 2,2-dimethylchroman products, respectively, in moderate to good yields. This transformation offers a convenient and expedient entry to prenylated derivatives of electron-rich aromatics that often display enhanced biological activities
Synthesis of petrocarpan analogues: 6a,11a-dehydropterocarpan-coumestan conversion
作者:D. Ferreira、C.v.d.M. Brink、D.G. Roux
DOI:10.1016/s0031-9422(00)89953-7
日期:1971.5
Gold(I)-catalyzed intermolecular hydroarylation of allenes with nucleophilic arenes: scope and limitations
作者:Michael A. Tarselli、Ann Liu、Michel R. Gagné
DOI:10.1016/j.tet.2008.10.110
日期:2009.2
The addition of nucleophilic methoxyarenes to allenes proceeds at room temperature in dichloromethane with a catalytic amount of phosphite-gold(I) precatalyst and silver additive. The addition is regioselective for the allene terminus, and generates E-allylation products without the need for prefunctionalization of the synthons as organometallics or allyl bromides. Coordinating heteroaromatics and