O-Methylhydroxylamine hydrochloride → HCID 9881022, compound

HRID 1826192Notes

Reaction equation

HRID 1826192 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([N:14]2[CH2:18][C@H:17]([C:19](O)=[O:20])[O:16][C:15]2=[O:22])[CH:5]=[CH:6][C:7]=1[N:8]1[CH2:13][CH2:12][O:11][CH2:10][CH2:9]1.Cl.[CH3:24][O:25][NH2:26].Cl.CN(C)CCCN=C=NCC>O1CCCC1.O.O>[F:1][C:2]1[CH:3]=[C:4]([N:14]2[CH2:18][C@H:17]([C:19]([NH:26][O:25][CH3:24])=[O:20])[O:16][C:15]2=[O:22])[CH:5]=[CH:6][C:7]=1[N:8]1[CH2:9][CH2:10][O:11][CH2:12][CH2:13]1

Participants

6

Reactant 3

HCID 521874O-Methylhydroxylamine hydrochlorideHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 23730106HCID 23730106, compound

Product 1

HCID 9881022HCID 9881022, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 21881883Oxolane--water (1/1)Solvent

Procedure

A mixture of (5R)-(−)-3-[3-fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinecarboxylic acid (EXAMPLE 1, Step 1, 150 mg, 0.483 mmol) and O-methylhydroxylamine hydrochloride (61 mg, 0.724 mmol) in tetrahydrofuran/water (1/1, 4.8 mL) was treated with 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (278 mg, 1.45 mmol), and the resulting mixture was stirred at ambient temperature for 30 minutes and was then diluted with water (10 mL) and extracted with ethyl acetate (2×20 mL). The combined organic phase was washed with water (10 mL) and saline (10 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure, and the crude product was chromatographed on a Flash 40S silica gel (40 g, 32-63 μm) cartridge, eluting with methanol/methylene chloride (2.5/97.5). Pooling and concentration of those fractions with an Rf=0.53 by TLC (methanol/chloroform, 10/90) gives the title compound, mp 206-208° C. (decomp.); MS (ESI+) for C15H18FN3O5 m/z 340 (M+H)+; [α]25D=−56° (c 0.92, DMSO).

Workup

  1. extractionextracted with ethyl acetate (2×20 mL)
  2. washThe combined organic phase was washed with water (10 mL) and saline (10 mL)
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customthe crude product was chromatographed on a Flash 40S silica gel (40 g, 32-63 μm) cartridge
  6. washeluting with methanol/methylene chloride (2.5/97.5)

Sources & evidence

ORD record
ord-62d9a35716974ca9bb4c44e9625719f2
Source dataset
uspto-grants-2006_05
Patent number
US07049443B2

Reaction notes

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