Synthesis of indenoindene-fused α-methylene-γ-butyrolactones via a tandem intra- and intermolecular Friedel–Crafts reaction
作者:Bo Ram Park、Se Hee Kim、Yu Mi Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2011.01.153
日期:2011.4
An efficient synthesis of indenoindene-fused α-methylene-γ-butyrolactones was carried out via a tandem intra- and intermolecular Friedel–Crafts reaction from the spiro-lactone, which can be easily prepared from ninhydrin by indium-mediated Barbier reaction of cinnamyl bromide.