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Formaldehyde → 3-(5-fluoro-2-hydroxyphenyl)-3-(hydroxymethyl)-1-pentyl-1,3-dihydro-2H-indol-2-one

HRID 545696
Notes
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Reaction equation

HRID 545696 reaction equation
[F:1][C:2]1[CH:3]=[CH:4][C:5]([OH:23])=[C:6]([CH:8]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]([CH2:17][CH2:18][CH2:19][CH2:20][CH3:21])[C:9]2=[O:22])[CH:7]=1.[CH2:24]=[O:25].C([N-]C(C)C)(C)C.[Li+].[Cl-].[NH4+]>C1COCC1.C(OCC)(=O)C>[F:1][C:2]1[CH:3]=[CH:4][C:5]([OH:23])=[C:6]([C:8]2([CH2:24][OH:25])[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]([CH2:17][CH2:18][CH2:19][CH2:20][CH3:21])[C:9]2=[O:22])[CH:7]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 712FormaldehydeHCID 25517Ammonium ChlorideHCID 2724682Lithium diisopropylamideHCID 588724603-(5-Fluoro-2-hydroxyphenyl)-1-pentylindolin-2-one

Product 1

HCID 120043053-(5-fluoro-2-hydroxyphenyl)-3-(hydroxymethyl)-1-pentyl-1,3-dihydro-2H-indol-2-one

Reagents, catalysts & solvents 2

HCID 8028
Tetrahydrofuran
Solvent
HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 3-(5-fluoro-2-hydroxyphenyl)-1-pentyl-1,3-dihydro-2H-indol-2-one (2.10 g, 6.70 mmol) in THF (20.0 mL) were added paraformaldehyde (1.76 g, 58.8 mmol) and lithium diisopropylamide (7.35 mL, 2.0 M in THF, 14.7 mmol) at 0° C. The reaction mixture was stirred at 0° C. for 2 hrs followed by the addition of ammonium chloride solution (10.0 mL) and ethyl acetate (100 mL). The organic layer was washed with water and brine, dried over Na2SO4 and filtered. The filtrate was concentrated in vacuo to dryness to give the title compound: 1H NMR (300 MHz, CDCl3) δ 9.55-9.10 (br, 1H), 7.53-6.86 (m, 6H), 6.57-6.49 (m, 1H), 4.74-4.30 (br, 1H), 4.18-4.07 (m, 2H), 3.79-3.60 (m, 2H), 1.77-1.61 (m, 2H), 1.41-1.24 (m, 4H), 0.87 (t, 3H); MS (ES+) m/z 326 (M−17), 366 (M+23).

Workup

  1. washThe organic layer was washed with water and brine
  2. dry with materialdried over Na2SO4
  3. filtrationfiltered
  4. concentrationThe filtrate was concentrated in vacuo to dryness

Sources & evidence

ORD record
ord-2b03fc0a91c543acb5079ca890293917
Source dataset
uspto-grants-2011_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07935721B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes