反应 #661871

反应方程式

2-ethylbutanoic acid

HCl

4-(trifluoromethoxy)phenyl isocyanate

1-(4-aminopiperidin-1-yl)-2-ethylbutan-1-one

→

desired compound

收率 54.0%

1-(1-(2-ethylbutanoyl)piperidin-4-yl)-3-(4-(trifluoromethoxy)phenyl)urea

收率 54.0%

溶剂

THF

反应条件

后处理

1. 1
   萃取followed by extraction with EtOAc
2. 2
   洗涤Flash chromatography eluted with 50:1 DCM
3. 3
   其他MeOH followed by recrystallization from acetone

实验过程

To an ice cold solution of 4-(trifluoromethoxy)phenyl isocyanate (60.9 mg, 0.3 mmol) in THF (1.5 ml) was added 1-(4-aminopiperidin-1-yl)-2-ethylbutan-1-one (59.4 mg, 0.3 mmol), prepared via Example 14 and Example 15 using 2-ethylbutanoic acid. The reaction mixture was allowed to warm to rt and stirred overnight. 1 M HCl aqueous solution was added followed by extraction with EtOAc. Flash chromatography eluted with 50:1 DCM:MeOH followed by recrystallization from acetone afforded desired compound (65 mg, 54%) as a white solid. Mp 167.0-167.4° C. 1H NMR (600 MHz, DMSO-d6) δ 8.50 (s, 1H), 7.47 (d, J=9.0 Hz, 2H), 7.22 (d, J=8.4 Hz, 2H), 6.28 (d, J=7.8 Hz, 1H), 4.27 (brd, J=13.2 Hz, 1H), 3.95 (brd, J=15.6 Hz, 1H), 3.75-3.69 (m, 1H), 3.18 (t, J=11.1 Hz, 1H), 2.81 (t, J=10.8 Hz, 1H), 2.68-2.60 (m, 1H), 1.88 (d, J=10.8 Hz, 1H), 1.82 (d, J=10.8 Hz, 1H), 1.51-1.45 (m, 2H), 1.45-1.30 (m, 2H), 1.30-1.10 (m, 2H), 0.83-0.75 (m, 6H). F NMR (300 MHz, DMSO-d6) −57.545 (s).

来源