“…The data are identical with those in the literature. [40] Methyl Following the procedure for 5 a, donor 3 a (80.8 mg, 107.05 μmol, 1.5 equiv) and alcohol 4 i (70.0 mg, 71.36 μmol, 1.0 equiv) were treated with Tf 2 NH (4.0 mg, 14.23 μmol, 0.2 equiv) at 0 °C to give 5 i (89.0 mg, 57.07 μmol, 80 %) as a white foam after purification by silica gel column chromatography (3 : 1, PE/EA, v/v). a ½ � 27 D = + 66.5 (c 2.0, CHCl 3 ); 1 H NMR (400 MHz, CDCl 3 ) δ 7.94-7.82 (m, 12H), 7.76 (dd, J = 7.7, 4.4 Hz, 4H), 7.67 (dd, J = 7.8, 3.9 Hz, 4H), 7.48-7.38 (m, 6H), 7.…”