tert-Butyl 3-(4,4-difluoro-1-piperidyl)azetidine-1-carboxylate → 1-(Azetidin-3-YL)-4,4-difluoropiperidine
反応式
C(OC([N:8]1[CH2:11][CH:10]([N:12]2[CH2:17][CH2:16][C:15]([F:19])([F:18])[CH2:14][CH2:13]2)[CH2:9]1)=O)(C)(C)C>C(Cl)Cl.C(O)(C(F)(F)F)=O>[NH:8]1[CH2:11][CH:10]([N:12]2[CH2:17][CH2:16][C:15]([F:18])([F:19])[CH2:14][CH2:13]2)[CH2:9]1参加物
3
実験手順
A 25 mL round-bottomed flask was charged with a solution of 3-(4,4-difluoropiperidin-1-yl)azetidine-1-carboxylic acid tert-butyl ester (0.684 g, 2.47 mmol) in DCM/TFA (4 mL/4 mL). The reaction mixture was stirred for 3 h at room temperature. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge. The cartridge was washed with MeOH and the desired product was eluted using 2 M NH3 in MeOH to give 1-Azetidin-3-yl-4,4-difluoropiperidine as a pale yellow oil (0.279 g, 64%). 1H NMR (CDCl3, 400 MHz) δ 3.64-3.54 (m, 4H); 3.30-3.25 (m, 1H); 2.43-2.37 (m, 4H); 2.06-1.93 (m, 5H).