P-Xylene → 1,3-Difluoro-5-[2-(4-fluorophenyl)ethenyl]benzene

Temperatur

120 °C

A 25 mL round bottom flask was charged with p-xylene (10 mL), Pd(OAc)2 (11.3 mg, 0.05 mmol), 1,3-bis-(2,6-diisopropylphenyl)imidazolinium chloride (21.4 mg, 0.05 mmol), 3,5-difluorobenzoyl chloride (0.89 g, 5 mmol), 4-fluorostyrene (0.74 g, 6 mmol), and N-methyl morpholine (0.69 g, 6 mmol). The mixture was stirred at 120° C. for 3.5 h under nitrogen atmosphere. Then it was cooled to room temperature and EtOAc was added and filtered. The filtrate was washed with brine and dried over Na2SO4. Then it was filtered and purified via flash chromatography and gave the product (0.94 g, 80%) as white solid. Data are: 1H NMR (CDCl3, 300 MHz) δ 7.47 (m, 2H), 7.08-6.88 (m, 6H), 6.70 (tt, 1H); 13C NMR (CDCl3, 75 MHz) δ 163.52 (dd), 162.98 (d), 140.82 (t), 132.77, 130.26, 128.58 (d), 126.53, 116.03 (d), 109.20 (q), 102.98 (t); 19F NMR (CDCl3, 282 MHz) δ −31207.2 (q, 2F), −31965.6 (q, 1F); HRMS (EI+) found 234.0645 M+, calcd 234.0656 for C14H9F3.

1. temperatureThen it was cooled to room temperature
2. filtrationfiltered
3. washThe filtrate was washed with brine
4. dry with materialdried over Na2SO4
5. filtrationThen it was filtered
6. custompurified via flash chromatography

ORD-Eintrag

ord-d65cb79ebeeb483aa774de122614010f

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08841477B2