反应详情

Hexafluoropropene (15 g, 0.10 mol) was added over 30 minutes (nitrogen atmosphere) at 0° C. to a stirred mixture of CH2═CH(CO)NHCH2CH2OH (6.25 g, 0.054 mol), acetonitrile (180 mL) and powdered K2CO3 (3.5 g). After complete addition, the stirred reaction mixture was gradually brought to room temperature (˜1 h). The resultant pale yellow solution was filtered, and the filtrate was concentrated at the rotary evaporator. The crude product was concentrated further at ˜2 mm Hg for 15 min on a vacuum line to afford 8.5 g of CH2═CH(CO)NHCH2CH2OCF2CFHCF3 as a light yellow, viscous liquid. EI/DIP MS: m/e 265 for M+ (C8H9F6NO); 19F NMR (CDCl3) δ−75.7 (m, 3F), −81.0 to −83.0 (ddm, 2 F), and −212.1 (m, 1 F) ppm. 1H NMR (CDCl3) δ 6.3 (dd, 1H), 6.2 (dd, 1H), 6.19 (dd, 1H), 5.7 (dd, 1H), 4.8 (dm, 1H, JHF=42 Hz), 4.1 (t, 2H) and 3.6 (dt, 2H).

1. additionAfter complete addition
2. customthe stirred reaction mixture
3. customwas gradually brought to room temperature
4. custom(˜1 h)
5. filtrationThe resultant pale yellow solution was filtered
6. concentrationthe filtrate was concentrated at the rotary evaporator
7. concentrationThe crude product was concentrated further at ˜2 mm Hg for 15 min on a vacuum line