反应详情

To 0.70 g (0.0022 mol) of the product obtained in Step B, dissolved in 10 mL toluene, was added 0.625 g (0.0030 mol) α,α,α-trifluoro-p-tolylisocyanate and 0.30 g (0.0029 mol) triethylamine. The reaction mixture was heated at reflux for 18 h, cooled to room temperature and concentrated under reduced pressure. The crude product was triturated with ether to afford 0.50 g of a white solid, mp 183°-184° C. 1H NMR (CDCl3) δ: 1.8-2.4 (m, 3H), 2.9 (d, 1H), 5.25 (bs, 1H), 6.95-7.4 (m, 9H), 7.7 (ABq, 4H), 9.02 (bs, 1H). IR (mineral oil): 3300, 1663 cm-1.

1. temperatureThe reaction mixture was heated
2. temperatureat reflux for 18 h
3. concentrationconcentrated under reduced pressure
4. customThe crude product was triturated with ether