Potassium Carbonate → tert-butyl [(1S)-2-({1-[5-(cyclobutylmethoxy)-1,3-benzoxazol-2-yl]piperidin-4-yl}oxy)-1-methylethyl]carbamate

HRID 2368086Notes

Reaction equation

[OH:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([N:10]3[CH2:15][CH2:14][CH:13]([O:16][CH2:17][C@@H:18]([NH:20][C:21](=[O:27])[O:22][C:23]([CH3:26])([CH3:25])[CH3:24])[CH3:19])[CH2:12][CH2:11]3)=[N:7][C:6]=2[CH:28]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:36][CH:37]1[CH2:40][CH2:39][CH2:38]1>CN(C=O)C.C(OCC)(=O)C>[CH:37]1([CH2:36][O:1][C:2]2[CH:3]=[CH:4][C:5]3[O:9][C:8]([N:10]4[CH2:15][CH2:14][CH:13]([O:16][CH2:17][C@@H:18]([NH:20][C:21](=[O:27])[O:22][C:23]([CH3:24])([CH3:26])[CH3:25])[CH3:19])[CH2:12][CH2:11]4)=[N:7][C:6]=3[CH:28]=2)[CH2:40][CH2:39][CH2:38]1

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of tert-butyl [(1S)-2-{[1-(5-hydroxy-1,3-benzoxazol-2-yl)piperidin-4-yl]oxy}-1-methylethyl]carbamate (389 mg) in DMF (5 mL) were added potassium carbonate (413 mg) and (bromomethyl)cyclobutane (297 mg), and the mixture was stirred with heating at 60° C. for 6 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 magnesium sulfate. The solvent was evaporated under reduced pressure, and the obtained residue was purified by silica gel chromatography (hexane/ethyl acetate) to give the title compound (380 mg).

Workup

temperatureto cool to room temperature
washwashed with saturated brine
dry with materialdried over anhydrous magnesium sulfate
customThe solvent was evaporated under reduced pressure
customthe obtained residue was purified by silica gel chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record: ord-550c85ae716341f59598af45e797dc5a
Source dataset: uspto-grants-2014_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08703758B2

Reaction notes

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