Reusable scandium/ionic liquid catalyst system for sequential C-C and C-O bond formations between phenols and dienes with atom economy

Article abstract of DOI:10.1055/s-2007-990963

Mild, efficient, and atom economical sequential C-C/C-O bond formations between phenols and dienes using the reusable catalyst system, Sc(OTf) ₃-[bmim] [PF₆], have been developed to afford in good yields a variety of dihydrobenzopyran and dihydrobenzofuran ring systems, which are important motifs in both naturally occurring and biologically active compounds. In these reactions the ionic liquid acts as not only an efficient additive but also an immobilizing agent for facilitating catalyst recycling. Georg Thieme Verlag Stuttgart.