Regiochemical Control in Intramolecular Cyclization of Methylene-Interrupted Epoxydiols
作者:Radha S. Narayan、Meenakshi Sivakumar、Ezzeddine Bouhlel、Babak Borhan
DOI:10.1021/ol016118h
日期:2001.8.9
regiochemical routes for cyclization. The 5-exo process is the most prevalent under acidic conditions. However, the regioselectivity can be controlled by the appropriate choice of acid promoter and pendant groups adjacent to the epoxide. The 5-exo product is obtained exclusively without the presence of a carbocation-stabilizing pendant group. Alkenyl and thiophenyl groups adjacent to the epoxide alter the regioselectivity