“…X 10 in. silica gel dry column (10% ether in hexane) to yield 1.23 g (87%) of the desired product at Rf = 0.3: ir (CC14) 1739, 1625, 1595; NMR (CC14) 5 6.7-7.9 (11 H, m), 3.80 (3 H, s), 3.60 (3 H, s), 3.3-3.8 (1 H, obscured by the methyl singlets), 3.05 (2 H, br t, / = 8), 2.15 (2 H, m); mass spectrum (m/e, %) 368 (3), 367 (8), 366 (33), 259 (13), 258 (25), 256 (14), 197 (38), 184 (23), 172 (36), 171 (100), 153 (23), 141 (17), 129 (17), 128 (100), 115 (20), 109 (26), 77 (15), 67 (21). Caled for C22H22O3S: 366.1289.…”