Sodium hydride → Benzyl [(9S)-11-oxo-9-phenyl-6,10-diazaspiro[4.6]undec-10-yl]acetate

HRID 1367257Notes

Reaction equation

HRID 1367257 reaction equation
[H-].[Na+].[C:3]1([C@H:9]2[NH:19][C:18](=[O:20])[C:13]3([CH2:17][CH2:16][CH2:15][CH2:14]3)[NH:12][CH2:11][CH2:10]2)[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.Br[CH2:22][C:23]([O:25][CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)=[O:24]>C1COCC1>[O:20]=[C:18]1[C:13]2([CH2:17][CH2:16][CH2:15][CH2:14]2)[NH:12][CH2:11][CH2:10][C@@H:9]([C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:19]1[CH2:22][C:23]([O:25][CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)=[O:24]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 62576Benzyl bromoacetateHCID 66973323(9S)-9-phenyl-6,10-diazaspiro[4.6]undecan-11-one

Product 1

HCID 86616407Benzyl [(9S)-11-oxo-9-phenyl-6,10-diazaspiro[4.6]undec-10-yl]acetate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

To a suspension of sodium hydride (0.147 g, 6.14 mmol) in THF (10 mL) was added (9S)-9-phenyl-6,10-diazaspiro[4.6]undecan-11-one (0.300 g, 1.23 mmol) at ambient temperature. The reaction was warmed to 60° C. for 2 h, then cooled to ambient temperature. Benzyl bromoacetate (0.309 g, 1.35 mmol) was added dropwise to the reaction. After 1 h, the mixture was quenched with a saturated aqueous ammonium chloride solution. The mixture was concentrated in vacuo then partitioned between H2O and CH2Cl2. The aqueous phase was then extracted several times with CH2Cl2. The combined organic extracts were washed with saturated brine, then dried over MgSO4, filtered and concentrated in vacuo The residue was purified by silica gel chromatography, eluting with a gradient of EtOAc:hexane—0:100 to 100:0, to yield the title compound. MS: m/z=393 (M+1).

Workup

  1. temperaturecooled to ambient temperature
  2. customthe mixture was quenched with a saturated aqueous ammonium chloride solution
  3. concentrationThe mixture was concentrated in vacuo
  4. customthen partitioned between H2O and CH2Cl2
  5. extractionThe aqueous phase was then extracted several times with CH2Cl2
  6. washThe combined organic extracts were washed with saturated brine
  7. dry with materialdried over MgSO4
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo The residue
  10. customwas purified by silica gel chromatography
  11. washeluting with a gradient of EtOAc

Sources & evidence

ORD record
ord-4d52221fa4bb411695b928f7d19cd8de
Source dataset
uspto-grants-2011_02
Patent number
US07893079B2

Reaction notes

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