Dichloromethane → HCID 10863893, compound

Participants

Reaction Steps

EX-220B) To a dichloromethane (9 mL) solution of the EX-220A amine (3.27 g, 8.65 mmol) was added 1,1,1-trifluoro-2,3-epoxypropane (0.968 mL, 11.3 mmol) and Yb(OTf)3 (0.536 g, 0.86 mmol). The cloudy mixture was stirred at room temperature for 24 hours, then diluted with diethyl ether. The organic layer was washed with water and brine, dried (MgSO4) and evaporated to yield 4.20 g (99%) of the desired 3-[(3-bromophenyl)-[[3-(1,1,2,2-tetrafluoroethoxy)phenyl]methyl]amino]-1,1,1-trifluoro-2-propanol product as a pale brown oil which can be used without further purification. The formation of the desired product was confirmed by the presence of the alcohol peak (δ1.5, d) in the 1H NMR spectrum (C6D6). An analytical sample was purified by silica gel chromatography eluting with 20% ethyl acetate in hexane to give the desired pure product as a yellow oil. FABMS m/z=491[M+H]+. 1H NMR (CDCl3) δ3.55-3.63 (m, 1H), 3.88 (dd, 1H), 4.36 (m, 1H), 4.69 (s, 2H), 5.914 (tt, 1H), 6.66 (dd, 1H), 6.92 (m, 2H), 7.06 (s, 1H), 7.09 (m, 3H), 7.36 (t, 1H).

Provenance & Evidence