Triethylamine → 1229022-23-4

HRID 1473753Notes

Reaction equation

HRID 1473753 reaction equation
[OH:1][C:2]1[C:6]2([CH2:11][CH2:10][N:9]([O:12][CH3:13])[CH2:8][CH2:7]2)[N:5]([CH3:14])[C:4](=[O:15])[C:3]=1[C:16]1[C:21]([CH3:22])=[CH:20][C:19]([CH3:23])=[CH:18][C:17]=1[CH3:24].C(N(CC)CC)C.Cl[C:33]([O:35][CH2:36][CH3:37])=[O:34]>CN(C)C1C=CN=CC=1.O1CCCC1.C(OCC)(=O)C.O>[CH3:13][O:12][N:9]1[CH2:10][CH2:11][C:6]2([N:5]([CH3:14])[C:4](=[O:15])[C:3]([C:16]3[C:21]([CH3:22])=[CH:20][C:19]([CH3:23])=[CH:18][C:17]=3[CH3:24])=[C:2]2[O:1][C:33](=[O:34])[O:35][CH2:36][CH3:37])[CH2:7][CH2:8]1

Participants

8

Reactant 3

HCID 8471TriethylamineHCID 10928Ethyl chloroformateHCID 58537907HCID 58537907, compound

Product 1

HCID 462168251229022-23-4

Reagents, catalysts & solvents 4

HCID 142844-(Dimethylamino)pyridineCatalystHCID 962WaterSolventHCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 4-hydroxy-8-methoxy-1-methyl-3-(2,4,6-trimethyl-phenyl)-1,8-diaza-spiro[4.5]dec-3-en-2-one (238 mg, 0.72 mmol), triethylamine (0.15 ml, 109 mg, 1.08 mmol) and 4-dimethylaminopyridine (2 mg) in tetrahydrofuran (10 ml) at 0° C. was added ethyl chloroformate (0.075 ml, 85 mg, 0.79 mmol) dropwise. The suspension was stirred at 0° C. for one hour. The reaction mixture was diluted with ethyl acetate and water, the layers separated, the aqueous phase extracted with ethyl acetate, the combined organic phases washed with brine, dried over sodium sulfate and concentrated. The residue was purified by chromatography on silica gel (ethyl acetate/heptane 5:1). Yield: 145 mg of carbonic acid ethyl ester 8-methoxy-1-methyl-2-oxo-3-(2,4,6-trimethyl-phenyl)-1,8-diaza-spiro[4.5]dec-3-en-4-yl ester (title compound P1.2) as a white solid, mp 134-136° C.

Workup

  1. customthe layers separated
  2. extractionthe aqueous phase extracted with ethyl acetate
  3. washthe combined organic phases washed with brine
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated
  6. customThe residue was purified by chromatography on silica gel (ethyl acetate/heptane 5:1)

Sources & evidence

ORD record
ord-293fb83e83b94fac9a618f4610739b34
Source dataset
uspto-grants-2015_04
Patent number
US09018135B2

Reaction notes

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