Benzyl Bromide → HCID 68690796, compound

HRID 1296250Notes

Reaction equation

HRID 1296250 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:22][CH2:21][N:11]2[C:12](=[O:20])[C:13]3[C:18]([CH:10]2[CH2:9]1)=[CH:17][CH:16]=[CH:15][C:14]=3[OH:19])=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH2:23](Br)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.C(OCC)(=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:22][CH2:21][N:11]2[C:12](=[O:20])[C:13]3[C:18]([CH:10]2[CH2:9]1)=[CH:17][CH:16]=[CH:15][C:14]=3[O:19][CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 3

HCID 7498Benzyl BromideHCID 11430Potassium CarbonateHCID 68688831HCID 68688831, compound

Product 1

HCID 68690796HCID 68690796, compound

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

To a solution of N-(t-butoxycarbonyl)-(±)-1,3,4,10b-tetrahydro-7-hydroxy-pyrazino[2,1-a]isoindol-6(2H)-one (30 mg, 0.10 mmol) from Example 72, Step B, in N,N-dimethylformamide (1.5 mL) was added benzyl bromide (0.017 L, 0.15 mmol) and potassium carbonate (41 mg, 0.29 mmol). The resulting mixture was warmed to 80° C. After 4 h the reaction was cooled to room temperature, diluted with ethyl acetate, washed with 50% saturated aqueous sodium chloride, and the the organic layer was dried over sodium sulfate, filtered, and concentrated. The resulting residue was purified by radial chromatography (30% ethyl acetate in hexanes) to give the desired product as a clear residue (31 mg, 80%). MS (ESI) 395.4 (M+H).

Workup

  1. temperatureAfter 4 h the reaction was cooled to room temperature
  2. washwashed with 50% saturated aqueous sodium chloride
  3. dry with materialthe the organic layer was dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe resulting residue was purified by radial chromatography (30% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-085e46d2a9434d7abb4b71c82d6616a6
Source dataset
uspto-grants-2007_07
Patent number
US07244843B2

Reaction notes

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