Revised Relative and Absolute Stereochemistry of (+)-Purpurin
The relative and absolute stereochemistries of (+)-purpurin (3), a flavanone natural product from Tephrosia, were determined to be 2S,7aR,10S,10aS by synthesis from semiglabrin in conjunction with X-ray crystallographic analysis.
Pirrung
MC
Department of Chemistry, P. M. Gross Chemical Laboratory, Duke University, Durham, North Carolina 27708-0346.
Lee
YR
Morehead
AT
McPhail
AT