Ammonium Chloride → 4-(2-Benzyloxyethoxy)-3-trifluoromethyl-phenylamine

HRID 576141Notes

Reaction equation

[CH2:1]([O:8][CH2:9][CH2:10][O:11][C:12]1[CH:17]=[CH:16][C:15]([N+:18]([O-])=O)=[CH:14][C:13]=1[C:21]([F:24])([F:23])[F:22])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH4+].[Cl-]>CO.[Zn]>[CH2:1]([O:8][CH2:9][CH2:10][O:11][C:12]1[CH:17]=[CH:16][C:15]([NH2:18])=[CH:14][C:13]=1[C:21]([F:22])([F:23])[F:24])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 20 °C

Procedure

To a mixture of 1-(2-(benzyloxy)ethoxy)-4-nitro-2-(trifluoromethyl)benzene (8.1 g, 23.73 mmol) in MeOH (100 mL) was added zinc (15.52 g, 237 mmol) and NH4Cl (12.70 g, 237 mmol). The mixture was stirred at 20° C. for 3 h. LCMS showed the reaction was finished. The mixture was filtered, and the filtrate was concentrated to give crude product, which was purified by silica gel column (PE/EA=5:1, Rf=0.4) to obtain 4-(2-(benzyloxy)ethoxy)-3-(trifluoromethyl)aniline (5.1 g, 14.40 mmol, 60.7% yield). 1H NMR (400 MHz, CDCl3) 7.35-7.24 (m, 5H), 6.81 (t, J=8.4 Hz, 2H), 6.78 (d, J=2.8 Hz, 1H), 4.63 (s, 2H), 4.13 (t, J=4.8 Hz, 2H), 3.83 (t, J=3.6 Hz, 2H); ES-LCMS m/z 312 (M+H).

Workup

filtrationThe mixture was filtered
concentrationthe filtrate was concentrated
customto give crude product, which
customwas purified by silica gel column (PE/EA=5:1, Rf=0.4)

Sources & evidence

ORD record: ord-2269e24eabf44093a4f1de282aadb91b
Source dataset: uspto-grants-2015_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09035063B2

Reaction notes

Loading…