反应详情

(E)-3-amino-1-(5-(2-cyclohexylvinyl)furan-2-yl)propan-1-ol (0.25 g, 1.0 mmol) was dissolved in CH2Cl2 (5 mL) and ethyl trifluoroacetate (0.5 mL) was added. The reaction mixture was stirred at room temperature for 30 min and concentrated under reduced pressure. Purification by flash chromatography (10%-50% EtOAc—hexanes gradient) gave (E)-N-(3-(5-(2-cyclohexylvinyl)furan-2-yl)-3-hydroxypropyl)-2,2,2-trifluoroacetamide as a colorless oil. Yield (0.26 g, 75%). (E)-N-(3-(5-(2-Cyclohexylvinyl)furan-2-yl)-3-hydroxypropyl)-2,2,2-trifluoroacetamide (0.15 g, 0.434 mmol) was dissolved in MeOH:H2O (3:1, 8 mL) and K2CO3 (0.13 g, 0.94 mmol) was added. The reaction mixture was stirred at room temperature overnight and concentrated under reduced pressure. Flash chromatography purification (2%-16% 7N NH3/MeOH—CH2Cl2 gradient) gave Example 14 as a light yellow oil. Yield (0.025 g, 23%); 1H NMR (400 MHz, CD3OD) δ 6.00-6.40 (m, 4H), 4.64-4.74 (m, 1H), 2.70-2.80 (m, 2H), 2.01-2.14 (m, 1H), 1.90-2.00 (m, 2H), 1.50-1.80 (m, 5H), 1.10-1.40 (m, 5H); RP-HPLC tR=10.06 min; ESI-MS m/z 232.2 [M−H2O+H]+.

1. concentrationconcentrated under reduced pressure
2. customPurification by flash chromatography (10%-50% EtOAc—hexanes gradient)