Water → (E)-4-(4,4,4-Trifluoro-3-(3,4,5-trichlorophenyl)but-1-enyl)-2-vinylbenzoic acid

To a stirred solution of (E)-2-bromo-4-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-enyl)benzoic acid (600 mg, 1.23 mmol) in dry toluene (10 mL) was added tributyl(vinyl)stannane (470 mg, 1.48 mmol) and the mixture was degassed with argon for 15 min Pd(PPh3)4 (72 mg, 0.06 mmol) was added and the reaction mixture was refluxed for 2 h. The reaction mixture was brought to ambient temperature, water was added and the mixture extracted with EtOAc. The organic layer was washed with 2N HCl and brine, dried (Na2SO4), filtered, and concentrated. The residue was purified by column chromatography on silica eluting with 30% EtOAc in petroleum ether to afford the title compound as brown solid (295 mg, 55%): 1H NMR (300 MHz, DMSO-d6) δ 13.05 (bs, 1H), 7.91 (s, 2H), 7.81-7.75 (m, 2H), 7.59 (d, J=8.1 Hz, 1H), 7.48 (dd, J=17.4, 10.8 Hz, 1H), 7.03 (dd, J=15.9, 8.7 Hz, 1H), 6.84 (d, J=15.6 Hz, 1H), 5.88 (d, J=16.5 Hz, 1H), 5.39 (d, J=12.3 Hz, 1H), 4.89-4.82 (m, 1H); ESIMS m/z 432.18 ([M−H]−); IR (thinfilm) 3418, 1689, 1114, 747 cm−1.

1. additionwas added
2. temperaturethe reaction mixture was refluxed for 2 h
3. customwas brought to ambient temperature
4. extractionthe mixture extracted with EtOAc
5. washThe organic layer was washed with 2N HCl and brine
6. dry with materialdried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by column chromatography on silica eluting with 30% EtOAc in petroleum ether

ORD record

ord-503ec1c7a70e40e1823545c05ca26ca8

Source dataset

uspto-grants-2016_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09226501B2