Stereochemistry and rearrangement reactions of hydroxylignanolactones.
ORGANIC & BIOMOLECULAR CHEMISTRY(2008)
摘要
Various conflicting data on the rearrangement and absolute stereochemistry of hydroxylignano-9,7'-lactones are resolved using O-18 labeled compounds, also confirmed by an X-ray analysis of a pure lignano-9,7'-lactone enantiomer, obtained for the first time. Under NaH/DMF rearrangement conditions a silyl protected hydroxylignano-9,9'-lactone underwent an unexpected silyl migration.
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