Phenylselenoetherification of some Δ4-alkenols facilitated by pyridine and some Lewis acids
作者:Biljana M. Šmit、Zorica M. Bugarčić
DOI:10.1002/jhet.487
日期:2010.11
Studies on the phenylselenoetherification of some Δ4‐alkenols in the presence of pyridine and some Lewis acids are described. All alkenols underwent intramolecular cyclization yielding corresponding tetrahydrofuran or tetrahydropyran derivatives. Yield and diastereomeric ratio of the cyclic products depend on counterion of selenylating reagent used. We found that external additives, such as pyridine