Dimethylformamide → (E)-5-(4-((2-(4-fluoro-2-methylphenyl)-6-methoxybenzo[b]thiophen-3-yl)oxy)styryl)-1,3,4-oxadiazol-2(3H)-one

Participants

Reaction Steps

To a 30 mL screw cap vial, (E)-3-(4-((2-(4-fluoro-2-methylphenyl)-6-methoxybenzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid (40 mg, 0.092 mmol) was dissolved in DMF (1 mL). The vial was charged with hydrazine (5.90 mg, 0.184 mmol), HATU (52.5 mg, 0.138 mmol), and DIEA (0.048 mL, 0.276 mmol). The reaction mixture was stirred for 10 min at room temperature. The reaction was quenched with sat. aq. NH4Cl and diluted with DCM. The organic phase was collected (phase separator) and concentrated by vacuum to afford to crude product. The crude material was purified by column chromatography (SiO2, 1-20% MeOH/DCM) to afford (E)-5-(4-((2-(4-fluor-2-methylphenyl)-6-methoxybenzo[b]thiophen-3-yl)oxy)styryl)-1,3,4-oxadiazol-2(3H)-one (38 mg, 0.085 mmol, 92% yield). LC/MS (m/z, MH+): 449.1

Provenance & Evidence