Hydrochloric Acid → N-dodecyl-3,5-bis(m-trifluoromethylphenyl)4-(2-hydroxyethoxy)benzamide

HRID 324051Notes

Reaction equation

[CH2:1]([NH2:13])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12].[Li]CCCC.C([O:21][C:22](=O)[C:23]1[CH:28]=[C:27]([C:29]2[CH:34]=[CH:33][CH:32]=[C:31]([C:35]([F:38])([F:37])[F:36])[CH:30]=2)[C:26]([O:39][CH2:40][CH2:41][OH:42])=[C:25]([C:43]2[CH:48]=[CH:47][CH:46]=[C:45]([C:49]([F:52])([F:51])[F:50])[CH:44]=2)[CH:24]=1)C.Cl>C1COCC1>[CH2:1]([NH:13][C:22](=[O:21])[C:23]1[CH:24]=[C:25]([C:43]2[CH:48]=[CH:47][CH:46]=[C:45]([C:49]([F:51])([F:52])[F:50])[CH:44]=2)[C:26]([O:39][CH2:40][CH2:41][OH:42])=[C:27]([C:29]2[CH:34]=[CH:33][CH:32]=[C:31]([C:35]([F:38])([F:37])[F:36])[CH:30]=2)[CH:28]=1)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12]

Participants

Conditions

Temperature: -78 °C

Procedure

To a flame-dried flask containing dodecyl amine (0.278 g, 1.5 mmol) in THF (5 mL) cooled to −78° C. was added n-BuLi (titrated to 2.37 M in hexanes) (0.670 mL, 1.59 mmol) dropwise. The solution was stirred at −78° C. for 20 min. and then warmed to room temperature over 20 min. The reaction was then recooled to −40° C. and 3,5-bis-(m-trifluoromethylphenyl)4-(2-hydroxyethoxy)benzoic acid ethyl ester (0.215 g, 0.43 mmol) in THF (5 mL) was added. This mixture was allowed to warm to room, temperature over 20 min. The reaction mixture was then poured into 0.1 N HCl solution and extracted with EtOAc. The combined organic layers were washed with 2 N HCl solution (3×), dried over MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography (30% EtOAc:hexane) to afford N-dodecyl-3,5-bis(m-trifluoromethylphenyl)-4-(2-hydroxyethoxy)benzamide (0.254 g, 93%) as a white solid. 1H NMR (CDCl3) δ7.90 (m, 2H); 7.82-7.76 (m, 4H); 7.65-7.56 (m, 4H); 6.22 (bt, 1H); 3.45 (dd, 2H); 3.30 (m, 4H); 1.60 (m, 2H); 1.25 (m, 18H); 0.84 (m, 3H).

Workup

temperaturewarmed to room temperature over 20 min
customwas then recooled to −40° C.
temperatureto warm to room, temperature over 20 min
extractionextracted with EtOAc
washThe combined organic layers were washed with 2 N HCl solution (3×)
dry with materialdried over MgSO4
concentrationconcentrated in vacuo
customThe residue was purified by flash chromatography (30% EtOAc:hexane)

Sources & evidence

ORD record: ord-d586ff4e98ed4d87a6e215a7f3f7ba5f
Source dataset: uspto-grants-2001_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06214877B1

Reaction notes

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