1,2-Dichloroethane → (R)-tert-butyl 1-amino-1-oxo-3-(thiophen-2-yl)propan-2-ylcarbamate

HRID 332794Notes

Reaction equation

HRID 332794 reaction equation
[C:1]([NH:8][C@@H:9]([C:16]([OH:18])=O)[CH2:10][C:11]1[S:12][CH:13]=[CH:14][CH:15]=1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].C1C=C2[N:25]=NN(O)C2=CC=1.O.C(Cl)CCl.[NH4+].[OH-]>CN(C=O)C.CCOC(C)=O.O>[NH2:25][C:16](=[O:18])[C@H:9]([NH:8][C:1](=[O:2])[O:3][C:4]([CH3:7])([CH3:6])[CH3:5])[CH2:10][C:11]1[S:12][CH:13]=[CH:14][CH:15]=1

Participants

8

Reactant 4

HCID 111,2-DichloroethaneHCID 14923Ammonium HydroxideHCID 27960291-Hydroxybenzotriazole hydrateHCID 7017898Boc-D-2-thienylalanine

Product 1

HCID 67776928(R)-tert-butyl 1-amino-1-oxo-3-(thiophen-2-yl)propan-2-ylcarbamateYield 89.1%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of Boc-β-(2-thienyl)-D-alanine (504 mg, 1.86 mmol), HOBt hydrate (340 mg, 2.22 mmol) and EDC (460 mg, 2.39 mmol) in DMF (8 mL) was stirred at room temperature for 30 min. Conc. NH4OH (0.800 mL) was added. The mixture was stirred at room temperature for 20 h. Water and EtOAc were added. Organic phase was separated, washed with 5% NaHCO3, dried over Na2SO4, concentrated in vacuo to give (R)-tert-butyl 1-amino-1-oxo-3-(thiophen-2-yl)propan-2-ylcarbamate as a solid (448 mg).

Workup

  1. customOrganic phase was separated
  2. washwashed with 5% NaHCO3
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-5f416669ae574e3584c5449ea663b0f1
Source dataset
uspto-grants-2014_11
Patent number
US08877760B2

Reaction notes

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