“…s, 1 H, 3-H), 7.25(d, low-field branch superimposed by the singlet of CHCl 3 , J 5,6 = 7.9 Hz, 1 H, 5-H), 7.83 ppm (d, J 6,5 = 8.1, 1 H, 6-H). The preceding data are consistent with those reported in the literature 46. The ee was determined by chiral HPLC (Chiralcel OD-H, n-heptane/i-PrOH 90:10, 1 mL/min, λ detector = 250 nm): t r (R) =16.83 min, t r (S) = 22.21 min.…”