“…The organics were dried over MgS04 and then concentrated under vacuum to give a foam (4.5 g) which was chromatographed over silica gel with 1% MeOH/CH2Cl2. The first product eluted was recrystallized in EtOH to afford 730 mg (17%) of (S)-56: mp 156-158 °C; [a]D = +3.7°(c = 1, MeOH); NMR (300 MHz, CDCI3) <5 8.68 (s, 1H), 8.33 (dd, Ji = J2 = 2.07 Hz, 2H), 8.20 (s, 1H), 7.37 (d, J = 6.32 Hz, 4H), 7.25 (t, J = 7.18 Hz, 4H), 7.18 (t, J = 5.44 Hz, 2H), 6.42 (dd, Ji=Ji = 2.15 Hz, 2H), 4.45 (dd, Ji = 14.1 Hz, J2 = 1. 13 Hz, 1H), 4.20 (dd, Ji = 7.…”