反应详情

To a solution of p-dodecylbenzenesulfonyl chloride (200 mg, 0.58 mmol) in pyridine (3 mL) was added 2-amino-5-hydroxymethyl-1,3,4-thiadiazole (70 mg, 0.53 mmol). The reaction mixture was stirred at room temperature for 4.5 h, then 2 M HCl (8 mL) was added to quench the reaction. The mixture was extracted with ethyl acetate (3×20 mL). The organic extracts were washed with water (10 mL), brine (10 mL), dried over Na2SO4, filtered, and concentrated. The residue was purified by chromatography on silica gel (70-230 mesh) eluted with CH2Cl2:methanol 19:1 to give the product as a solid, mp 138-139° C., in 65% yield (151 mg, 0.34 mmol); 1H NMR (300 MHz, DMSO-d6) δ 0.84 (t, 3H, J=6.6 Hz), 1.22 (m, 18H), 1.54-1.57 (m, 2H), 2.64 (t, 2H, J=7.8 Hz), 4.57 (s, 2H), 6.05 (br, 1H), 7.35 (d, 2H, J=8.1 Hz), 7.67 (d, 2H, J=7.8 Hz); 13C NMR (75 MHz, DMSO-d6) δ 13.9, 22.1, 28.6, 28.7, 28.8, 29.0, 30.6, 31.3, 34.9, 58.4, 125.8, 128.9, 139.2, 147.5, 161.1, 167.5; MS (LCQ, ESI+) Calcd for C21H34N3O3S2 440.2, found 440.2 (M+H)+; HRMS (ESI+, m/z) Calcd for C21H34N3O352 440.2042, found 440.2029 (M+H)+.

1. customto quench
2. customthe reaction
3. extractionThe mixture was extracted with ethyl acetate (3×20 mL)
4. washThe organic extracts were washed with water (10 mL), brine (10 mL)
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. customThe residue was purified by chromatography on silica gel (70-230 mesh)
9. washeluted with CH2Cl2:methanol 19:1