Stereoselective Entry to the Bicycle[4.3.0] Skeleton of Oplopanes Using a Transannular Cyclization Strategy
作者:Guillermo Delgado、Salvador Guzmán
DOI:10.1055/s-1999-3121
日期:——
Treatment of budlein B with acid gave a H-4β,H-9α-oplopane via lactone cleavage, allylic rearrangement, transannular cyclization and pinacol-type rearrangement. This transformation is stereochemically complementary to that of schkuhriolide, which produces an H-4α,H-9β-oplopane.