Tetrahydrofuran → tert-Butyl (1S,2S)-1-amino-2-ethylcyclopropane-1-carboxylate

HRID 1365009Notes

Reaction equation

HRID 1365009 reaction equation
[C:1]([O:5][C:6]([C@:8]1([NH:13]C(OCC[Si](C)(C)C)=O)[CH2:10][C@@H:9]1[CH2:11][CH3:12])=[O:7])([CH3:4])([CH3:3])[CH3:2].CCCC[N+](CCCC)(CCCC)CCCC.[F-].C1COCC1>C(OCC)(=O)C>[C:1]([O:5][C:6]([C@:8]1([NH2:13])[CH2:10][C@@H:9]1[CH2:11][CH3:12])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 8028TetrahydrofuranHCID 2724141Tetrabutylammonium FluorideHCID 86601847(1S,2S) 2-Ethyl-1-(2trimethylsilanylethoxycarbonylamino)cyclopropane-carboxylic acid tert-butyl ester

Product 1

HCID 86620254tert-Butyl (1S,2S)-1-amino-2-ethylcyclopropane-1-carboxylate

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

To the product of Step 3 (3 g, 9 mmol) was added a 1.0M TBAF solution in THF (9.3 mL, 9.3 mmol). The mixture was heated to reflux for 1.5 hours, cooled to room temperature, and diluted with 500 mL of ethyl acetate. The solution was successively washed with water (2×100 mL) and brine (2×100 mL), dried (MgSO4), filtered, and concentrated in vacuo to provide the desired product.

Workup

  1. temperatureThe mixture was heated
  2. temperatureto reflux for 1.5 hours
  3. washThe solution was successively washed with water (2×100 mL) and brine (2×100 mL)
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-4fafb7c25e3e441ba38328592ec42f77
Source dataset
uspto-grants-2011_02
Patent number
US07888464B2

Reaction notes

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