1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxamide

HRID 1406866Notes

Reaction equation

HRID 1406866 reaction equation
CC[N:3](C(C)C)C(C)C.[CH2:10]([O:17][N:18]1[C:24](=[O:25])[N:23]2[CH2:26][C@H:19]1[CH2:20][CH2:21][C@H:22]2[C:27]([OH:29])=O)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.[NH4+].[Cl-]>CN(C=O)C>[CH2:10]([O:17][N:18]1[C:24](=[O:25])[N:23]2[CH2:26][C@H:19]1[CH2:20][CH2:21][C@H:22]2[C:27]([NH2:3])=[O:29])[C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=1

Participants

7

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 25517Ammonium ChlorideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 57389355(2S,5R)-6-(Benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid

Product 1

HCID 57389435(2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxamideYield 80.3%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

DIPEA (5.8 mL, 36.2 mmol) was added to a solution of (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octane-2-carboxylic acid (5.0 g, 18.1 mmol), EDCI (5.2 g, 27.2 mmol), HOBT (3.7 g, 27.2 mmol) and NH4Cl (1.94 g, 36.2 mmol) in DMF (60 mL) at rt. The reaction mixture was stiffed for 17 hrs, then diluted with ice water (100 mL) and extracted with EtOAc (3×). The combined organic layer was dried over Na2SO4, and concentrated. The residue was purified by silica gel column chromatography (2:1 EtOAc/petroleum ether) to afford (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octane-2-carboxamide (4.0 g, 80%) as a white solid. ESI-MS (EI+, m/z): 276 [M+H]+.

Workup

  1. extractionextracted with EtOAc (3×)
  2. dry with materialThe combined organic layer was dried over Na2SO4
  3. concentrationconcentrated
  4. customThe residue was purified by silica gel column chromatography (2:1 EtOAc/petroleum ether)

Sources & evidence

ORD record
ord-d8e3902865864186b4318b38e064867f
Source dataset
uspto-grants-2014_12
Patent number
US08916709B2

Reaction notes

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