Trifluoroacetic acid → 4-(4-chlorophenoxy)Benzeneethanamine
反応式
C(OC(=O)[NH:7][CH2:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([O:16][C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)=[CH:12][CH:11]=1)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[Cl:23][C:20]1[CH:21]=[CH:22][C:17]([O:16][C:13]2[CH:14]=[CH:15][C:10]([CH2:9][CH2:8][NH2:7])=[CH:11][CH:12]=2)=[CH:18][CH:19]=1参加物
4
実験手順
{2-[4-(4-Chloro-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (600 mg, 1.72 mmol, 1 eq) and TFA (658 μl) were dissolved in 50 ml of dry DCM under argon atmosphere. The mixture was stirred at room temperature for 60 hours. The solvent was evaporated, the resulting crude was dissolved in 10 ml of MeOH and was purified using 20 g SCX column. The free base was rinsed from the column using 1 N NH3/ethanol solution. The solvent was evaporated and obtained was 2-[4-(4-chloro-phenoxy)-phenyl]-ethylamine (404 mg, yield=90.8%, purity=96%) in form of yellowish oil. MS: [M+H]+=248.21 1H NMR (300 MHz; CDCl3) δ/ppm 1.22 (s, 2H), 2.71 (t, J=6.62 Hz, 2H), 2.95 (t, J=6.62 Hz, 2H), 6.85-6.96 (m, 4H), 7.16 (d, J=7.60 Hz, 2H), 7.25 (d, J=7.60 Hz, 2H)