Reaction Steps
A solution of the product of Example 1 (1.00 g, 1.92 mmol), ethanethiol (0.45 mL, 6.18 mmol), and aluminum chloride (1.54 g, 11.55 mmol) in anhydrous methylene chloride (40 mL) was stirred for 3.5 hours. The mixture was quenched with saturated potassium sodium tartrate (also known as Rochelle's salt) and extracted with ethyl acetate. The organic layer was washed with saturated sodium potassium tartrate and brine, dried (sodium sulfate), and concentrated. The residue was purified by chromatography (silica gel, 0-10% methanol in methylene chloride) to give 520 mg (53%) of the title product as a dark yellow/green foam: 1H NMR (300 MHz, CDCl3) δ1.46 (m, 2H), 1.65 (m, 4H), 2.54 (m, 4H), 2.73 (t, J=5.4 Hz, 2H), 3.96 (t, J=5.4 Hz, 2H), 6.37 (d, J=8.7 Hz, 2H), 6.88 (dd, J=1.9 Hz, 8.8 Hz, 1H), 7.23-7.29 (m, 2H), 7.37-7.51 (m, 5H), 7.62-7.70 (m, 3H), 8.02-8.05 (m, 1H), 8.28 (br s, 1H); 13C NMR (75 MHz, CDCl3) δ23.3, 24.7, 54.4, 57.0, 64.5, 106.9, 113.0, 115.2, 124.2, 124.3, 125.2, 125.5, 126.1, 127.6, 128.7, 128.7, 130.3, 130.5, 131.2, 131.6, 131.8, 132.8, 133.4, 140.7, 141.1, 154.6, 161.6, 192.1; MS (FD) m/e 508 (MH+); Anal. calc'd. for C32H29NO3S: C, 75.71; H, 5.76; N, 2.76. Found: C, 75.43; H, 6.02; N, 3.03.
