Dimethylformamide → 4-{5-[1-[4-(2,4-Bis-trifluoromethyl-benzyloxy)-3-methoxy-phenyl]-methylidene]-4-oxo-4,5-dihydro-thiazol-2-yl}-piperazine-1-carbothioic acid (4-methoxy-phenyl)-amide

Participants

Reaction Conditions

Reaction Steps

To a N2 purged flask was added 5-[1-[4-(2,4-bis-trifluoromethyl-benzyloxy)-3-methoxy-phenyl]-methylidene]-2-piperazin-1-yl-thiazol-4-one (120 mg, 220 μmol) from Example 23, DMF (8 mL) and MeCN (8 mL). To the reaction solution was added 4-methoxylphenyl isothiocyanate (55 mg, 330 μmol). The reaction was stirred at 55° C. for 20 h and LC analysis should product was formed. The reaction solution was concentrated under reduced pressure and then taken into EtOAc (100 mL), washed with aq. NH4Cl (70 mL) and brine (50 mL), dried over Na2SO4, filtered, and concentrated in vacuo. The crude material was chromatographed using reverse phase preparative HPLC, H2O/MeCN gradient 90:10 to 10:90) to provide the title compound as a white solid (24 mg, 13% yield). 1H NMR (DMSO-d6) δ 8.17 (1H, d, J=8.1 Hz), 8.11 (1H, s), 8.02 (1H, d, J=8.1 Hz), 7.64 (1H, s), 7.15-7.23 (5H, m), 6.88 (2H, d, J=8.9 Hz), 5.42 (2H, s), 4.16 (2H, br s), 4.09 (2H, m), 4.03 (2H, m), 3.86 (3H, s), 3.80 (2H, m), 3.74 (3H, s); MS (ESI) 711 (MH+).

Provenance & Evidence