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Ethyl Acetate → methyl 3-[(3-methyl-4-oxo-3,4-dihydro-2H-1,3-benzoxazin-7-yl)oxy]-5-[(3S)-tetrahydrofuran-3-yloxy]benzoate

HRID 548735
Notes
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Reaction equation

HRID 548735 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]([CH:9]=[C:10]([O:12][C@H:13]2[CH2:17][CH2:16][O:15][CH2:14]2)[CH:11]=1)[C:5]([O:7][CH3:8])=[O:6].F[C:19]1[CH:30]=[CH:29][C:22]2[C:23](=[O:28])[N:24]([CH3:27])[CH2:25][O:26][C:21]=2[CH:20]=1.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>C(#N)C>[CH3:27][N:24]1[C:23](=[O:28])[C:22]2[CH:29]=[CH:30][C:19]([O:1][C:2]3[CH:3]=[C:4]([CH:9]=[C:10]([O:12][C@H:13]4[CH2:17][CH2:16][O:15][CH2:14]4)[CH:11]=3)[C:5]([O:7][CH3:8])=[O:6])=[CH:20][C:21]=2[O:26][CH2:25]1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 576631937-Fluoro-3-methyl-2,3-dihydro-4H-1,3-benzoxazin-4-oneHCID 59127189Methyl 3-hydroxy-5-{[(3S)-oxolan-3-yl]oxy}benzoate

Product 1

HCID 57663180methyl 3-[(3-methyl-4-oxo-3,4-dihydro-2H-1,3-benzoxazin-7-yl)oxy]-5-[(3S)-tetrahydrofuran-3-yloxy]benzoateYield 39%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
160 °C

Procedure

A mixture of methyl 3-hydroxy-5-[(3S)-tetrahydrofuran-3-yloxy]benzoate (184 mg, 0.77 mmol), 7-fluoro-3-methyl-2,3-dihydro-4H-1,3-benzoxazin-4-one (140 mg, 0.77 mmol) and potassium carbonate (214 mg, 1.54 mmol) in acetonitrile (5 mL) was stirred in a microwave reactor at 160° C. for 10 hours then reduced in vacuo and ethyl acetate (50 mL) added. The organics were washed with brine (50 mL), dried (MgSO4), and reduced in vacuo and the crude oil purified by chromatography on silica, eluting with 30%-80% ethyl acetate in isohexane, to give the desired compound as a colourless oil (0.12 g).

Workup

  1. additionadded
  2. washThe organics were washed with brine (50 mL)
  3. dry with materialdried (MgSO4)
  4. customthe crude oil purified by chromatography on silica
  5. washeluting with 30%-80% ethyl acetate in isohexane

Sources & evidence

ORD record
ord-d69d1368e58643e6a4cb1ea3eb09a20b
Source dataset
uspto-grants-2011_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07943607B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes