Summary of the specific rotation and enantiomeric excess of α-OHTAM stereoisomers
Values of ee were determined by the formation of the α-camphanate ester of each enantiomer and evaluation of 1H NMR spectra of the esters.
α-OHTAM | [α]D25 | ee |
|---|---|---|
| % | ||
| E-(+)-α-OHTAM | +110.7 | 99 |
| E-(-)-α-OHTAM | -94.7 | 85 |
| Z-(+)-α-OHTAM | +77.1 | 92 |
| Z-(-)-α-OHTAM | -74.5 | 90 |