Water → N-benzyl-N-(tert-butoxycarbonyl)-L-phenylalaninal

HRID 265694Notes

Reaction equation

HRID 265694 reaction equation
[C:1]([O:5][C:6]([N:8]([CH2:19][C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)[C@H:9]([CH2:17][OH:18])[CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.O>CS(C)=O>[C:1]([O:5][C:6]([N:8]([CH2:19][C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1)[C@H:9]([CH:17]=[O:18])[CH2:10][C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 962WaterHCID 8471TriethylamineHCID 15434535N-(t-Butoxycarbonyl)-N-benzyl-L-phenylalaninol

Product 1

HCID 11099858N-benzyl-N-(tert-butoxycarbonyl)-L-phenylalaninalYield 100%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

To a solution of 2.38 g(6.98 moles) of N-(t-butoxycarbonyl)-N-benzyl-L-phenylalaninol from Example 11 in 3.8 mL (27.2 mmoles) of triethylamine at 10° C. was added a solution of 4.33 g (27.2 mmoles) of sulfur trioxide pyridine complex in 17 mL of dimethyl sulfoxide. The mixture was warmed to room temperature and stirred for one hour. Water (16 mL) was added and the mixture was extracted with 20 mL of ethyl acetate. The oragnic layer was washed with 20 mL of 5% citric acid, 20 mL of water, 20 mL of brine, dried over magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure to give 2.37 g 100% yield) of N-(t-Butoxycarbonyl)-N-benzyl-L-phenylalaninal.

Workup

  1. extractionthe mixture was extracted with 20 mL of ethyl acetate
  2. washThe oragnic layer was washed with 20 mL of 5% citric acid, 20 mL of water, 20 mL of brine
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-0a0af5df1a1d4b93a32a3a5b805bdfad
Source dataset
uspto-grants-1997_07
Patent number
US05648511

Reaction notes

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