反应详情

To a flame dried round bottom flask with 8-(benzoxazol-2-ylsulfanyl)octylamine (0.155 g, 0.558 mmol) in benzene:EtOH (1:1, 6 mL) at room temperature was added 3,5-bis-(m-chlorophenyl)-4-(2-hydroxyethoxy)benzoic acid (0.150 g, 0.372 mmol) followed by EEDQ (0.258 g, 1.04 mmol). After 3 days at this temperature, it was diluted with EtOAc (200 mL). This solution was washed with 1 N HCl (20 mL), sat. aq. NaHCO3 (20 mL), and brine (20 mL) and then dried (MgSO4). After concentration, the residue was purified by preparatory plate chromatography (30% EtOAc/petroleum ether) to afford the product (0.183 g, 74%) as a solid; 1H NMR (CDCl3) δ 1.28–1.42 (m, 6H), 1.42–1.68 (m, 5H), 1.77–1.97 (m, 2H), 3.27–3.41 (m, 6H), 3.46 (dd, J=6.1, 13.5 Hz, 2H), 6.09–6.17 (m, 1H), 7.22–7.47 (m, 7H), 7.47–7.5 (m, 2H), 7.54–7.66 (m, 3H), 7.74 (s, 2H); mass spectrum [(+) ESI], m/z 664 (M+H)+.

1. washThis solution was washed with 1 N HCl (20 mL), sat. aq. NaHCO3 (20 mL), and brine (20 mL)
2. dry with materialdried (MgSO4)
3. concentrationAfter concentration
4. customthe residue was purified by preparatory plate chromatography (30% EtOAc/petroleum ether)