Reaktion #325990

Reaktionsgleichung

vinyl acetate

(R)-4-fluoro-N-(1-(4-fluoro-3-hydroxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenyethyl)-3-(trifluoromethyl)benzamide

Na2CO3

→

(R)-4-fluoro-N-(1-(4-fluoro-3-(vinyloxy)phenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-3-(trifluoromethyl)benzamide

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   FiltrationThe resulting mixture was filtered
2. 2
   Waschenthe solid was washed with CH2Cl2
3. 3
   WaschenThe CH2Cl2 layer was washed with 1 N NaOH, H2O
4. 4
   Trocknendried over Na2SO4
5. 5
   Filtrationfiltered
6. 6
   SonstigeThe solvent was evaporated under reduced pressure
7. 7
   Sonstigethe residue was purified by silica gel column

Vorschrift

To a solution of (R)-4-fluoro-N-(1-(4-fluoro-3-hydroxyphenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenyethyl)-3-(trifluoromethyl)benzamide (Example 264, 100 mg, 0.158 mmol) in toluene (0.2 ml) was added Na2CO3 (25 mg, 0.235 mmol) and catalystical amount of [Ir(cod)Cl]2 (2 mg), followed by vinyl acetate (68 mg, 0.79 mmol). The reaction mixture was stirred at 100° C. for 16 h. The resulting mixture was filtered and the solid was washed with CH2Cl2. The CH2Cl2 layer was washed with 1 N NaOH, H2O and dried over Na2SO4 and filtered. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column using 0 to 60% EtOAc in hexane to afford (R)-4-fluoro-N-(1-(4-fluoro-3-(vinyloxy)phenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-3-(trifluoromethyl)benzamide eluting out at 20% EtOAc in hexane as colorless oil (80 mg, 77%). LCMS: RT=2.237 min [M+H] 658.3 (2 min Phenomenex Luna C18 column, 4.6×30 mm eluting with 10-90% MeOH/H2O over 2 minutes containing 0.1% TFA; 5 mL/min, monitoring at 220 nm. NMR: 400 MHz 1H (CD3OD) ppm 3.87 (d, J=12.74 Hz, 1H), 4.05-4.15 (m, 1H), 4.35 (dd, J=5.93, 1.98 Hz, 1H), 4.55 (dd, J=13.84, 1.98 Hz, 1H), 6.12-6.41 (m, 1H), 6.48 (dd, J=13.62, 6.15 Hz, 1H), 6.72 (d, J=7.03 Hz, 2H), 6.87-7.24 (m, 9H), 7.37-7.51 (m, 1H), 7.88-8.04 (m, 2H).

Quelle