Water → tert-butyl{(2S)-1-[4-chloro-2-(1,1,1-trifluoro-2-methylpropan-2-yl)phenoxy]propan-2-yl}carbamate

HRID 2178701Notes

Reaction equation

C(=O)([O-])[O-].[Cs+].[Cs+].[Cl:7][C:8]1[CH:13]=[CH:12][C:11]([OH:14])=[C:10]([C:15]([CH3:21])([CH3:20])[C:16]([F:19])([F:18])[F:17])[CH:9]=1.CS(O[CH2:27][C@@H:28]([NH:30][C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH3:29])(=O)=O.O>CN(C)C=O>[Cl:7][C:8]1[CH:13]=[CH:12][C:11]([O:14][CH2:29][C@@H:28]([NH:30][C:31](=[O:32])[O:33][C:34]([CH3:35])([CH3:37])[CH3:36])[CH3:27])=[C:10]([C:15]([CH3:21])([CH3:20])[C:16]([F:17])([F:18])[F:19])[CH:9]=1

Participants

Conditions

Temperature: 60 °C

Procedure

Cesium carbonate (2.05 g, 6.28 mmol) was added to a solution of 4-chloro-2-(1,1,1-trifluoro-2-methylpropan-2-yl)phenol (C48) (500 mg, 2.10 mmol) in N,N-dimethylformamide (5 mL). (2S)-2-[(tert-Butoxycarbonyl)amino]propyl methanesulfonate (P12) (0.53 g, 2.1 mmol) was added, and the reaction mixture was heated to 60° C. After 30 minutes, additional P12 (0.53 g, 2.1 mmol) was added, and heating was continued for 18 hours. Water (100 mL) was added, and the mixture was extracted with diethyl ether (3×50 mL). The combined organic layers were dried over magnesium sulfate, filtered, and concentrated under reduced pressure. Silica gel chromatography (Gradient: 0% to 15% ethyl acetate in heptane) afforded the product as a colorless oil. Yield: 625 mg, 1.58 mmol, 75%.

Workup

additionadditional P12 (0.53 g, 2.1 mmol) was added
temperatureheating
waitwas continued for 18 hours
extractionthe mixture was extracted with diethyl ether (3×50 mL)
dry with materialThe combined organic layers were dried over magnesium sulfate
filtrationfiltered
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-eb8cedd37a054055b331dcec2b8eb380
Source dataset: uspto-grants-2015_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09067934B2

Reaction notes

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