Potassium Carbonate → tert-butyl [(1S)-2-({1-[6-(cyclopropylmethoxy)-1,3-benzoxazol-2-yl]piperidin-4-yl}oxy)-1-methylethyl]carbamate

HRID 2368063Notes

Reaction equation

HRID 2368063 reaction equation
[OH:1][C:2]1[CH:28]=[CH:27][C:5]2[N:6]=[C:7]([N:9]3[CH2:14][CH2:13][CH:12]([O:15][CH2:16][C@@H:17]([NH:19][C:20](=[O:26])[O:21][C:22]([CH3:25])([CH3:24])[CH3:23])[CH3:18])[CH2:11][CH2:10]3)[O:8][C:4]=2[CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:36][CH:37]1[CH2:39][CH2:38]1>CN(C=O)C.C(OCC)(=O)C>[CH:37]1([CH2:36][O:1][C:2]2[CH:28]=[CH:27][C:5]3[N:6]=[C:7]([N:9]4[CH2:10][CH2:11][CH:12]([O:15][CH2:16][C@@H:17]([NH:19][C:20](=[O:26])[O:21][C:22]([CH3:24])([CH3:23])[CH3:25])[CH3:18])[CH2:13][CH2:14]4)[O:8][C:4]=3[CH:3]=2)[CH2:39][CH2:38]1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 81503BromomethylcyclopropaneHCID 86658692tert-butyl [(1S)-2-{[1-(6-hydroxy-1,3-benzoxazol-2-yl)piperidin-4-yl]oxy}-1-methylethyl]carbamate

Product 1

HCID 86658693tert-butyl [(1S)-2-({1-[6-(cyclopropylmethoxy)-1,3-benzoxazol-2-yl]piperidin-4-yl}oxy)-1-methylethyl]carbamate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of tert-butyl [(1S)-2-{[1-(6-hydroxy-1,3-benzoxazol-2-yl)piperidin-4-yl]oxy}-1-methylethyl]carbamate (445 mg) in DMF (3 mL) were added potassium carbonate (471 mg) and (bromomethyl)cyclopropane (0.331 mL), and the mixture was stirred with heating at 60° C. for 7 hr under a nitrogen atmosphere. The reaction mixture was allowed to cool to room temperature, diluted with ethyl acetate, washed with saturated brine, and dried over anhydrous sodium sulfate. The extract was applied to silica gel chromatography (NH, ethyl acetate), and concentrated under reduced pressure, and the obtained residue was purified by silica gel chromatography (hexane/ethyl acetate) to give the title compound (439 mg).

Workup

  1. temperatureto cool to room temperature
  2. washwashed with saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customthe obtained residue was purified by silica gel chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-3764050a5c4f40e1bdda9d844ee657e0
Source dataset
uspto-grants-2014_04
Patent number
US08703758B2

Reaction notes

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