Ammonium Chloride → (E)-3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylamide

To a 30 mL vial, (E)-3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid (98 mg, 0.23 mmol) was dissolved in DMF (2 mL). The vial was charged with HATU (129 mg, 0.34 mmol) and DIEA (0.119 mL, 0.68 mmol) and the mixture was stirred for 10 min. A color change from pale orange to a dark orange was observed. To the solution was added NH4Cl (24.24 mg, 0.45 mmol) and the reaction mixture was stirred for 30 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 to afford the crude product. The crude material was purified by column chromatography (SiO2, 1-10% MeOH/DCM) to afford (E)-3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylamide (77 mg, 0.18 mmol, 79% yield) as an off white solid. 1H NMR (400 MHz, CD3OD) δ ppm=8.00 (s, 4H), 7.59-7.70 (m, 2H), 7.45-7.55 (m, 2H), 7.42 (d, J=2.02 Hz, 1H), 7.24 (d, J=8.59 Hz, 1H), 6.84-7.02 (m, 4H), 6.52 (d, J=15.66 Hz, 1H), 3.88 (s, 2H), 3.79 (s, 3H). LC/MS (m/z, MH+): 432.3.

1. stirringthe reaction mixture was stirred for 30 min at room temperature
2. customThe reaction was quenched with sat. aq. NH4Cl
3. additiondiluted with DCM
4. customThe organic phase was collected (phase separator)
5. concentrationconcentrated
6. customto afford the crude product
7. customThe crude material was purified by column chromatography (SiO2, 1-10% MeOH/DCM)

ORD record

ord-4aa29fa34f5f43378d5e399490b1f9e5

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08877801B2