(4R,4'R,5S,5'S)-2,2'-Cyclopropylidenebis[4,5-dihydro-4,5-diphenyloxazole], 98%, (99% ee)

Technical Notes：
1.Ligand used in the Ru- and Cu-catalyzed enantios elective propargylic alkylation of propargylic alcohols with ß-ketoesters [1] and ß-keto phosphonates.
2.Used in the synthesis of highly substituted chiral v-lactams via catalytic asymmetric formal [3+2][3+2]- and [3+3]-cycloadditions of(Z)-v-ethyI enoldiazoacetate with diaziridine.