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

HRID 2252611
Notes
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Reaction equation

HRID 2252611 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]
ParticipantsProcedureWorkupSources & evidenceReaction notes

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 Acetate
Solvent

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) and the mixture heated to reflux for 1.5 hours, cooled to room temperature and then diluted with 500 mL of ethyl acetate. The solution was successively washed with water (2×100 mL), brine (2×100 mL), dried (MgSO4), filtered, and concentrated in vacuo to provide the title intermediate.

Workup

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

Sources & evidence

ORD record
ord-c5e1dc9f8f73457e8881587468d20c5c
Source dataset
uspto-grants-2008_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07323447B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes