反应详情

Methylene chloride (0.6 L) was added to a 1 L flask containing 2-allyl-4-(trifluoromethyl)-1-vinylbenzene (80.0 g, 0.377 mol). Bis(tricyclohexylphosphine)benzylidine ruthenium(IV) dichloride (Grubbs catalyst, 1st generation) (3.1 g, 0.0038 mol) was added to the solution and the resulting solution was refluxed overnight (18 h). The solvent was evaporated to give a dark oil, which was passed through a silica gel plug using pentane. After pentane was carefully removed, 57 g (82.8%) of pure product was collected as slight brown oil. 1H NMR (400 MHz, CDCl3) δ (ppm) 7.72 (s, 1H), 7.55 (d, 1H), 7.48 (d, 1H), 6.93 (m, 1H), 6.74 (m, 1H), 3.46 (brs, 1H).

1. temperaturethe resulting solution was refluxed overnight (18 h)
2. customThe solvent was evaporated
3. customto give a dark oil, which
4. customAfter pentane was carefully removed
5. custom57 g (82.8%) of pure product was collected as slight brown oil