“…The cis-hexahydro-4,5-dihydroxy-l-methylsulfonylazepine 11 crystallized. It was collected, washed, and dried: mp 170-173 °C (45.1 g, 0.215 mol, 78%); NMR (Me2SO) 4.36 (exchangeable, 2), 3.74 (m, 2), 3.22 (t, 4), 2.82 (s, 3), 2.0-1.5 (m, 4); IR (Nujol) 3360-3280 (s), 1130 (s), 958 (s), 868 (s), 708 (m) cm"1; TLC (CHC13/CH30H 9:1 on silica gel GF) Rf 0.40.…”