Hydrochloric Acid → Carbonic acid 3-(5-bromo-3-fluoro-2-methyl-phenyl)-8-methoxy-2-oxo-1,8-diaza-spiro[4.5]dec-3-en-4-yl ester ethyl ester

HRID 1962383Notes

Reaction equation

HRID 1962383 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([F:23])[C:5]([CH3:22])=[C:6]([C:8]2[C:9](=[O:21])[NH:10][C:11]3([CH2:18][CH2:17][N:16]([O:19][CH3:20])[CH2:15][CH2:14]3)[C:12]=2[OH:13])[CH:7]=1.Cl[C:25]([O:27][CH2:28][CH3:29])=[O:26].N1C=CC=CC=1.Cl>C(#N)C>[CH2:28]([O:27][C:25](=[O:26])[O:13][C:12]1[C:11]2([CH2:18][CH2:17][N:16]([O:19][CH3:20])[CH2:15][CH2:14]2)[NH:10][C:9](=[O:21])[C:8]=1[C:6]1[CH:7]=[C:2]([Br:1])[CH:3]=[C:4]([F:23])[C:5]=1[CH3:22])[CH3:29]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 1049PyridineHCID 10928Ethyl chloroformateHCID 580832043-(5-Bromo-3-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diazaspiro[4.5]dec-3-en-2-one

Product 1

HCID 59614596Carbonic acid 3-(5-bromo-3-fluoro-2-methyl-phenyl)-8-methoxy-2-oxo-1,8-diaza-spiro[4.5]dec-3-en-4-yl ester ethyl ester

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 3-(5-bromo-3-fluoro-2-methyl-phenyl)-4-hydroxy-8-methoxy-1,8-diaza-spiro[4.5]dec-3-en-2-one (350 mg) and ethyl chloroformate (77 μl) in acetonitrile (2 ml) was added pyridine (80 μA) and the reaction mixture stirred at room temperature for one hour. The mixture was poured on diluted HCl and extracted with ethyl acetate (3×). The combined organic layers were washed with brine, dried over sodium sulfate and concentrated. The residue was purified by chromatography on silica gel (ethyl acetate/cyclohexane 3:1). Yield: 310 mg of carbonic acid 3-(5-bromo-3-fluoro-2-methyl-phenyl)-8-methoxy-2-oxo-1,8-diaza-spiro[4.5]dec-3-en-4-yl ester ethyl ester (title compound E4) as a solid.

Workup

  1. extractionextracted with ethyl acetate (3×)
  2. washThe combined organic layers were washed with brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customThe residue was purified by chromatography on silica gel (ethyl acetate/cyclohexane 3:1)

Sources & evidence

ORD record
ord-65d0c58d06d34951835749a88ef06fde
Source dataset
uspto-grants-2013_04
Patent number
US08415369B2

Reaction notes

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