Potassium Carbonate → Di-tert-butyl (4S)-N-(tert-butoxycarbonyl)-4-[4-(3-fluoropropoxy)benzyl]-L-glutamate

HRID 591256Notes

Reaction equation

HRID 591256 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:10][C@H:11]([CH2:19][C:20]1[CH:25]=[CH:24][C:23]([OH:26])=[CH:22][CH:21]=1)[C:12]([O:14][C:15]([CH3:18])([CH3:17])[CH3:16])=[O:13])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].I[CH2:41][CH2:42][CH2:43][F:44]>CN(C)C=O>[C:1]([O:5][C:6]([NH:8][C@H:9]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:10][C@H:11]([CH2:19][C:20]1[CH:25]=[CH:24][C:23]([O:26][CH2:41][CH2:42][CH2:43][F:44])=[CH:22][CH:21]=1)[C:12]([O:14][C:15]([CH3:16])([CH3:18])[CH3:17])=[O:13])=[O:7])([CH3:2])([CH3:3])[CH3:4]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 128991281-Iodo-3-fluoropropaneHCID 70957078di-tert-butyl (4S)-N-(tert-butoxycarbonyl)-4-(4-hydroxybenzyl)-L-glutamate

Product 1

HCID 70674426Di-tert-butyl (4S)-N-(tert-butoxycarbonyl)-4-[4-(3-fluoropropoxy)benzyl]-L-glutamate

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

To 93 mg (0.20 mmol) of di-tert-butyl (4S)—N-(tert-butoxycarbonyl)-4-(4-hydroxybenzyl)-L-glutamate (Example 1b) in 9 mL N,N-dimethylformamide were added 60.7 mg (0.44 mmol) of powdered potassium carbonate and 45 mg (0.24 mmol) of 1-iodo-3-fluoropropane (ABCR GmbH, Germany) and the resulting suspension was stirred for 5 h at 60° C. and overnight at room temperature. The reaction mixture was than filtered, the solvent evaporated and the residue was taken up in ethyl acetate and water. The organic phase was separated off, washed with water until neutral, dried over sodium sulfate and filtered, and the filtrate was concentrated in vacuo. The crude product obtained in this manner was chromatographed on silica gel using a dichloromethane/methanol gradient, and the appropriate fractions were combined and concentrated.

Workup

  1. filtrationthan filtered
  2. customthe solvent evaporated
  3. customThe organic phase was separated off
  4. washwashed with water until neutral,
  5. dry with materialdried over sodium sulfate
  6. filtrationfiltered
  7. concentrationthe filtrate was concentrated in vacuo

Sources & evidence

ORD record
ord-82c6a512333d4a8daa38c41fb2626900
Source dataset
uspto-grants-2016_01
Patent number
US09238631B2

Reaction notes

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