Direct FeX<sub>3</sub>-Based Stereocontrolled Access to (<i>Z</i>)-3-Alkenyl-oxindoles from Allenols
作者:Benito Alcaide、Pedro Almendros、Amparo Luna、Natividad Prieto
DOI:10.1021/jo302296r
日期:2012.12.21
Iron trihalides (FeCl3 and FeBr3) smoothly promote the halogenation/rearrangement of 2-indolinone-tethered allenols to efficiently afford 3-halodienyl-oxindoles with good yield and total selectivity. Also, 2-halo-1,3-dienes are synthetically interesting building blocks for the preparation of functionalized 3-alkenyl-oxindoles through a Suzuki-Miyaura reaction.