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1-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperidin-4-yl acetate → 1-Methyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)piperidine

HRID 2281835
Notes
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Reaction equation

HRID 2281835 reaction equation
C(OC1CCN([C:11]2[CH:16]=[CH:15][C:14]([B:17]3[O:21][C:20]([CH3:23])([CH3:22])[C:19]([CH3:25])([CH3:24])[O:18]3)=[CH:13][CH:12]=2)CC1)(=O)C.BrC1C=CC([O:31][CH:32]2[CH2:37][CH2:36][N:35]([CH3:38])[CH2:34][CH2:33]2)=CC=1>CCOC(C)=O.O>[CH3:38][N:35]1[CH2:36][CH2:37][CH:32]([O:31][C:11]2[CH:12]=[CH:13][C:14]([B:17]3[O:18][C:19]([CH3:24])([CH3:25])[C:20]([CH3:22])([CH3:23])[O:21]3)=[CH:15][CH:16]=2)[CH2:33][CH2:34]1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 667303481-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperidin-4-yl acetateHCID 667304064-(4-Bromophenoxy)-1-methylpiperidine

Product 1

HCID 667342511-Methyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)piperidine

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8857Ethyl Acetate
Solvent

Procedure

The title compound was synthesized according to the method described for the synthesis of 1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperidin-4-yl acetate, except substituting 4-(4-bromophenoxy)-1-methylpiperidine (300 mg, 1.11 mmol). The reaction was then allowed to cool to rt and was diluted with EtOAc and water was added. The resulting mixture was extracted with EtOAc and the combined organic extracts were washed with brine, dried over MgSO4 and concentrated to give the crude product. Crude product was purified by flash chromatography using MeOH/CH2Cl2 (2:98 to 15:85) to give the title compound as a brown solid (200 mg, 57%). 1H NMR (400 MHz, CD3OD) δ 7.68 (d, J=7.6 Hz, 2H), 6.94 (d, J=7.7 Hz, 2H), 4.53 (br s, 1H), 2.94-2.91 (m, 2H), 2.58-2.50 (m, 2H), 2.40 (s, 3H), 2.18-2.00 (m, 2H), 1.93-1.78 (m, 2H), 1.34 (m, 12H); MS ESI 318.1 [M+H]+, calcd for [C18H28BNO3+H]+ 318.22.

Workup

  1. additionwas added
  2. extractionThe resulting mixture was extracted with EtOAc
  3. washthe combined organic extracts were washed with brine
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customto give the crude product

Sources & evidence

ORD record
ord-182645e345b745269cd8177c91432e76
Source dataset
uspto-grants-2015_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09139563B2

Reaction notes

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