反应详情

A solution of compound 113 (0.18 g, 0.704 mmol) in dry ethanol (10 mL) was treated with thiophene-2-carboximidothioic acid methyl ester hydroiodide (0.4 g, 1.409 mmol) at room temperature and stirred for 24 h. Solvent was evaporated and crude was diluted with sat. NaHCO3 solution (20 mL) and product was extracted into CH2Cl2 (2 25 mL). The combined CH2Cl2 layer was washed with brine (20 mL) and dried (Na2SO4). Solvent was evaporated and crude was purified by column chromatography (2 M NH3 in methanol: CH2Cl2, 1:9) to obtain compound 114 (0.24 g, 90%) as a solid. mp 113-115° C.; 1H NMR (DMSO-d6) δ 1.42-1.53 (m, 1H), 1.97-2.02 (m, 1H), 2.08-2.22 (m, 8H), 2.31-2.60 (m, 3H), 6.03 (s, 1H), 6.21 (brs, 2H), 6.65 (dd, 1H, J=1.2, 8.4 Hz), 7.09 (t, 1H, J=4.2 Hz), 7.20 (s, 1H), 7.28-7.31 (m, 2H), 7.58 (d, 1H, J=4.5 Hz), 7.71 (d, 1H, J=2.7 Hz), 10.88 (s, 1H), ESI-MS m/z (%): 365 (MH+, 39), 320 (38), 183 (76), 160 (100); ESI-HRMS calculated for C21H25N4S (MH+), Calculated: 365.1813: Observed: 365.1794.

1. customSolvent was evaporated
2. additioncrude was diluted with sat. NaHCO3 solution (20 mL) and product
3. extractionwas extracted into CH2Cl2 (2 25 mL)
4. washThe combined CH2Cl2 layer was washed with brine (20 mL)
5. dry with materialdried (Na2SO4)
6. customSolvent was evaporated
7. customcrude was purified by column chromatography (2 M NH3 in methanol: CH2Cl2, 1:9)