反应详情

温度

60 °C

To a solution of (1R,2S)-1-[3,5-bis(trifluoromethyl)phenyl]-N2-{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}propane-1,2-diamine (25.1 mg, 0.0424 mmol) in dichloroethane (1.5 mL) was added triethylamine (15 μL, 0.105 mmol) and diphenyl cyanocarbonimidate (13 mg, 0.053 mmol). The reaction was heated at 60° C. overnight, cooled to room temperature, filtered, and loaded directly onto a silica gel column for purification by flash chromatography with 10 to 40% EtOAc/hexanes to afford ((4R,5S)-4-[3,5-bis(trifluoromethyl)phenyl]-1-{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}-5-methylimidazolidin-2-ylidene)cyanamide. Rf=0.20 (25% EtOAc/hexanes). LCMS=643.3 (M+1)+. 1H NMR (C6D6, 500 MHz; atropisomers present, doubling of some peaks) δ 6.53-8.83 (m, 10H), 3.61-4.91 (m, 3H), 3.28-2.70 (m, 5H), 1.14-1.25 (m, 6H), −0.39-0.26 (m, 3H).

1. temperaturecooled to room temperature
2. filtrationfiltered
3. customloaded directly onto a silica gel column for purification by flash chromatography with 10 to 40% EtOAc/hexanes