Thiourea → HCID 86625962, compound

Participants

Reaction Steps

To a stirred solution of 1.9 (500 mg, 1.38 mmol) in MeOH—CH2Cl2 (10:1, 11 mL) was added thiourea (262 mg, 3.45 mmol) at room temperature, and the mixture was stirred overnight. After concentration under reduced pressure, the residue was dissolved in ethyl ether. The ethyl ether solution was washed with water and brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane=2/5) to give 1.3 (400 mg, 77%) as a colorless oil. 1H NMR (500 MHz, CDCl3): δ 2.15 (dd, 1H, J=5.5, 2.0 Hz), 2.53 (dd, 1H, J=6.5, 2.0 Hz), 3.05 (m, 1H), 3.17 (dd, 1H, J=14.5, 7.0 Hz), 3.51 (dd, 1H, J=14.5, 5.5 Hz), 3.65 (s, 2H), 3.72 (s, 3H), 7.03-7.05 (m, 2H), 7.08-7.10 (m, 2H), 7.33-7.34 (m, 2H), 7.85-7.86 (m, 2H); 13C NMR (125 MHz, CDCl3): δ 24.2, 26.0, 40.3, 52.1, 62.6, 117.7, 120.5, 130.7, 130.9, 131.1, 131.9, 153.8, 162.8, 171.8; HRMS (FAB) calcd for C18H19O5S2 (M+H+) 379.0674. found 379.0645.

Provenance & Evidence