Water → HCID 11230046, compound

HRID 2105549Notes

Reaction equation

HRID 2105549 reaction equation
[CH3:1][O:2][C:3]1[CH:21]=[CH:20][C:6]([CH2:7][N:8]2[C:14](=[O:15])[CH2:13][CH2:12][CH2:11][C:10]3[CH:16]=[CH:17][CH:18]=[CH:19][C:9]2=3)=[CH:5][CH:4]=1.[Li+].[CH3:23][CH:24]([N-:26]C(C)C)C.Br[CH2:31][C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33].[OH2:39]>C1COCC1>[OH:39][NH:26][C:24](=[O:33])[CH2:23][CH:13]1[C:14](=[O:15])[NH:8][C:9]2[CH:19]=[CH:18][CH:17]=[CH:16][C:10]=2[CH2:11][CH2:12]1.[C:35]([O:34][C:32](=[O:33])[CH2:31][CH:13]1[C:14](=[O:15])[N:8]([CH2:7][C:6]2[CH:5]=[CH:4][C:3]([O:2][CH3:1])=[CH:21][CH:20]=2)[C:9]2[CH:19]=[CH:18][CH:17]=[CH:16][C:10]=2[CH2:11][CH2:12]1)([CH3:38])([CH3:37])[CH3:36]

Participants

7

Reactant 4

HCID 962WaterHCID 79177tert-Butyl bromoacetateHCID 14749841,3,4,5-Tetrahydro-1-[(4-methoxyphenyl)methyl]-2H-1-benzazepin-2-oneHCID 2724682Lithium diisopropylamide

Product 2

HCID 11230046HCID 11230046, compoundHCID 69004791HCID 69004791, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

A solution of 1-(4-methoxy-benzyl)-1,3,4,5-tetrahydro-benzo[b]azepin-2-one (0.71 mmol) in 2 mL of anhydrous THF is cooled down to −78° C. and freshly prepared LDA (0.85 mmol) is slowly added to the mixture. After the addition, the mixture is allowed to warm up to 0° C., then stirred for 30 minutes and cooled down again to −78° C. Tert-butyl bromoacetate (1.0 mmol) is added. The mixture is stirred at −78° C. for 1 hour and then allowed to warm up to 0° C. To quench the reaction, 1 mL of a mixture of EtOH and water (1:1) is added to the mixture at 0° C. and the mixture is allowed to warm up to room temperature. Water (20 mL) is added followed by extraction (EtOAc, 3×15 mL). The combined organic layers are washed with brine and dried over MgSO4. Solvent is removed under vacuum and the residue is purified by flash column chromatography (silica gel, 0-25% EtOAc/hexane) to provide the desired product [1-(4-methoxy-benzyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-3-yl]-acetic acid tert-butyl ester as white solid. Yield: 30%. 1H NMR (400 MHz, CDCl3): δ 7.24 (m, 2H), 7.13 (m, 4H), 6.75 (d, 2H), 5.10 (d, 1H), 4.80 (d, 1H), 2.86(m, 2H), 2.38-2.50(m, 2H), 2.17(q, 1H), 1.80-2.05(m, 2H), 1.40(s, 9H). MS: (ES+): 396 [M+1].

Workup

  1. additionAfter the addition
  2. temperaturecooled down again to −78° C
  3. stirringThe mixture is stirred at −78° C. for 1 hour
  4. temperatureto warm up to 0° C
  5. customTo quench
  6. customthe reaction, 1 mL of a mixture of EtOH and water (1:1)
  7. additionis added to the mixture at 0° C.
  8. temperatureto warm up to room temperature
  9. extractionfollowed by extraction (EtOAc, 3×15 mL)
  10. washThe combined organic layers are washed with brine
  11. dry with materialdried over MgSO4
  12. customSolvent is removed under vacuum
  13. customthe residue is purified by flash column chromatography (silica gel, 0-25% EtOAc/hexane)

Sources & evidence

ORD record
ord-06a4c55cc22d4e66abb9756cb0dcf0a5
Source dataset
uspto-grants-2009_08
Patent number
US07579363B2

Reaction notes

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