Direct enantiomeric separation of all four optical isomers of 2-phenylcyclopropanecarboxylate ester was first achieved on each of the three different β-cyclodextrin chiral stationaryphases (CSPs) in GC. Using these CSPs, enantiomeric excess of the products of enantioselectivecyclopropanation can be determined directly, conveniently and fast.
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