Viktória Ujj, J. Schindler, T. Novák
Aug 22, 2008
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Journal
Tetrahedron-asymmetry
Abstract
Abstract A convenient and efficient resolution of 1-phenyl- 1a and 1-naphthyl-3-methyl-3-phospholene 1-oxides 1b is described. The separation is based on the finding that the calcium hydrogen O , O ′-dibenzoyl-(2 R ,3 R )-tartrate 2 or calcium hydrogen O , O ′-di- p -toluyl-(2 R ,3 R )-tartrate 3 forms diastereomeric coordination complexes with the enantiomers of phospholene 1-oxides 1a and 1b . The stereostructure of the supramolecular formation of Ca( 1a ) 2 (H-DBTA) 2 and absolute configuration of the 3-phospholene oxide 1a were elucidated by single crystal X-ray crystallography.