Trimethylsulfonium iodide → 3(S)-[N-(t-butoxycarbonyl)-N-benzylamino]-1,2-(S)-epoxy-4-phenylbutane

HRID 1825016Notes

Reaction equation

HRID 1825016 reaction equation
[I-].C[S+](C)C.[CH3:6]C(C)([O-])C.[K+].[C:12]([O:16][C:17]([N:19]([CH2:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[C@H:20]([CH:28]=[O:29])[CH2:21][C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)=[O:18])([CH3:15])([CH3:14])[CH3:13]>C(#N)C.O>[C:12]([O:16][C:17]([N:19]([C@@H:20]([CH2:21][C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1)[C@@H:28]1[O:29][CH2:6]1)[CH2:30][C:31]1[CH:32]=[CH:33][CH:34]=[CH:35][CH:36]=1)=[O:18])([CH3:15])([CH3:13])[CH3:14]

Participants

6

Reactant 3

HCID 75127Trimethylsulfonium iodideHCID 11099858N-benzyl-N-(tert-butoxycarbonyl)-L-phenylalaninalHCID 23665647Potassium tert-butoxide

Product 1

HCID 154318943(S)-[N-(t-butoxycarbonyl)-N-benzylamino]-1,2-(S)-epoxy-4-phenylbutaneYield 99.7%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6342AcetonitrileSolvent2×

Procedure

To a suspension of 0.90 g (4.42 mmoles) of trimethylsulfonium iodide in 18 mL of acetonitrile was added 0.495 g (4.42 mmoles) of potassium t-butoxide. A solution of 1.0 g (2.95 mmoles) of N-(t-butoxycarbonyl)-N-benzyl-L-phenylalaninal in 7 mL of acetonitrile was added and the mixture was stirred at room temperature for one hour. The mixture was diluted with 80 mL of water and extracted twice with 80 mL of ethyl acetate. The organic layers were combined and washed with 100 mL water, 30 mL brine, dried over sodium sulfate, filtered and concentrated under reduced pressure to give 1.04 g of a yellow crude oil. The crude product was a mixture of the two diastereomers N,αS-bis(phenylmethyl)-N-(t-butoxycarbonyl)-2S-oxiranemethanamine and N,αS-bis(phenylmethyl)-N-(t-butoxycarbonyl)-2R-oxiranemethanamine.

Workup

  1. extractionextracted twice with 80 mL of ethyl acetate
  2. washwashed with 100 mL water, 30 mL brine
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-c4894664161a40179cbcf2b0c34ffaf9
Source dataset
uspto-grants-2006_05
Patent number
US07045518B2

Reaction notes

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