Short-RInChIKey=SA-FUHFF-UHFFFADPSC-MFYKDMZDJH-UHFFFADPSC-NUHFF-NFAQW-NUHFF-ZZZ

A mixture of the (4R)-2,4-diphenyl-4,5-dihydro-1,3-oxazole (501 mg, 2.24 mmol, 1.00 equiv), [RuCl2(benzene)]2 (569 mg, 1.14 mmol, 0.507 equiv), KPF6 (1.67 g, 9.05 mmol, 4.03 equiv), and NaOH(aqua) (1 m, 2.25 mL, 2.25 mmol, 1.00 equiv) in MeCN (25 mL, degassed) was stirred for 48 h at 80 °C in a Schleck tube under argon atmosphere. The reaction mixture was diluted with water (25 mL), extracted with DCM (3 × 20 mL) and was dried over Na2SO4. The solvent was removed under reduced pressure.