Crystal Structures of (3R,3aR,4S,7R,7aS)-3-(Allyloxy)hexahydro-4,7-epoxyisobenzofuran-1(3H)-one and (3S,3aR,4S,7R,7aS)-3-((E)-But-2-en-1-yloxy)hexahydro-4,7-epoxyisobenzofuran-1(3H)-one: Confirmation of NMR Predicted Stereocentre Geometry
Crystal Structures of (3R,3aR,4S,7R,7aS)-3-(Allyloxy)hexahydro-4,7-epoxyisobenzofuran-1(3H)-one and (3S,3aR,4S,7R,7aS)-3-((E)-But-2-en-1-yloxy)hexahydro-4,7-epoxyisobenzofuran-1(3H)-one: Confirmation of NMR Predicted Stereocentre Geometry
作者:Mark Tarleton、Paul V. Bernhardt、Adam McCluskey
DOI:10.1007/s10870-012-0275-z
日期:2012.6
Crystal structures of two isomeric norcantharidin derivatives (3R,3aR,4S,7R,7aS)-3-(allyloxy)hexahydro-4,7-epoxyisobenzofuran-1(3H)-one (7b), and (3S,3aR,4S,7R,7aS)-3-((E)-but-2-en-1-yloxy)hexahydro-4,7-epoxyisobenzofuran-1(3H)-one (8a) have been determined. In both instances the equivalent enantiomer was also obtained. The crystal structures of these compounds clarify the stereochemistry inferred only by NMR analysis before. Two norcantharidin analogues have been separated into their two possible diastereomers and the structural identity of each compound has been confirmed from their corresponding crystal structures and NMR.