3. Compounding selectivity in reactions of diastereoisomeric radical intermediates: An experimental demonstration that the yield of a product from a diastereotopic-group-selective reaction can significantly exceed the level of group selectivity

Article abstract of DOI:10.1002/hlca.19960790104

Reduction of a bis-radical precursor, 6-pnenyl-1,1-bis[3-(phenylselanyl)propyl]-3a,4-dihydro-1H,3H-cyclopenta[c]furan- 5-one (6), with 3 equiv. of Ph₃SnH provides mixtures of cis,cis- or cis,trans-angular triquinane products (3aα,5aβ,8β,8aR*)-