Lithium Hydroxide → (2S,5R)-6-(Benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid

HRID 2272851Notes

Reaction equation

HRID 2272851 reaction equation
[Li+].[OH-].[CH2:3]([O:10][N:11]1[C:17](=[O:18])[N:16]2[CH2:19][C@H:12]1[CH2:13][CH2:14][C@H:15]2[C:20]([O:22]CC)=[O:21])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1>C1COCC1.O>[CH2:3]([O:10][N:11]1[C:17](=[O:18])[N:16]2[CH2:19][C@H:12]1[CH2:13][CH2:14][C@H:15]2[C:20]([OH:22])=[O:21])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 72204974Ethyl (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylate

Product 1

HCID 57389355(2S,5R)-6-(Benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acidYield 85.6%

Reagents, catalysts & solvents 1

HCID 21881883Oxolane--water (1/1)Solvent

Procedure

LiOH (1.2 g, 29.6 mmol) was added to a solution of (2S,5R)-ethyl 6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylate (9 g, 29.6 mmol) in THF/H2O (3:1, 240 mL). The mixture was then stirred at rt overnight. The reaction mixture was washed with EtOAc twice, then the aqueous solution was adjusted pH 2-3 with 1N HCl. The resulting mixture was extracted with DCM three times, and the combined organic layer was dried over saturated Na2SO4 and concentrated under reduced pressure to provide (2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxylic acid (7.0 g, 77.7%), which was directly used in the next step without further purification. ESI-MS (EI+, m/z): 277.31. 1H NMR (300 MHz, CDCl3) δ 7.49-7.29 (m, 5H), 5.06 (d, J=11.4 Hz, 1H), 4.91 (d, J=11.4 Hz, 1H), 4.15-4.10 (m, 1H), 3.36-3.34 (m, 1H), 3.15-3.11 (m, 1H), 2.83 (d, J=11.8 Hz, 1H), 2.32-2.15 (m, 1H), 2.11-2.01 (m, 2H), 1.74-1.56 (m, 1H).

Workup

  1. washThe reaction mixture was washed with EtOAc twice
  2. extractionThe resulting mixture was extracted with DCM three times
  3. dry with materialthe combined organic layer was dried over saturated Na2SO4
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-c2eb53be985f4303bfbd4b30c259af50
Source dataset
uspto-grants-2015_09
Patent number
US09120795B2

Reaction notes

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