Dichloromethane → 1-(diphenylmethyl)-7-fluoro-3-hydroxy-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-1,3-dihydro-2H-indol-2-one

HRID 1407480Notes

Reaction equation

HRID 1407480 reaction equation
[O:1]1[C:6]2[CH:7]=[CH:8][C:9]([OH:11])=[CH:10][C:5]=2[O:4][CH2:3][CH2:2]1.C([Mg]Cl)(C)C.[F:17][C:18]1[CH:19]=[CH:20][CH:21]=[C:22]2[C:26]=1[N:25]([CH:27]([C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1)[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)[C:24](=[O:40])[C:23]2=[O:41].ClCCl>O1CCCC1>[C:34]1([CH:27]([C:28]2[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=2)[N:25]2[C:26]3[C:22](=[CH:21][CH:20]=[CH:19][C:18]=3[F:17])[C:23]([OH:41])([C:8]3[C:9]([OH:11])=[CH:10][C:5]4[O:4][CH2:3][CH2:2][O:1][C:6]=4[CH:7]=3)[C:24]2=[O:40])[CH:35]=[CH:36][CH:37]=[CH:38][CH:39]=1

Participants

6

Reactant 4

HCID 6344DichloromethaneHCID 91152732,3-Dihydro-1,4-benzodioxin-6-olHCID 673566781-(diphenylmethyl)-7-fluoro-1H-indole-2,3-dioneHCID 178418918HCID 178418918, compound

Product 1

HCID 685991191-(diphenylmethyl)-7-fluoro-3-hydroxy-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-1,3-dihydro-2H-indol-2-oneYield 84.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

To a cooled (0° C.) suspension of 2,3-dihydro-1,4-benzodioxin-6-ol (0.47 g, 3.0 mmol) in anhydrous tetrahydrofuran (12 mL) was added isopropylmagnesium chloride (2 M solution in tetrahydrofuran, 1.7 mL, 3.3 mmol). The reaction mixture was stirred at 0° C. for 1 h, and 7-fluoro-1-(diphenylmethyl)-1H-indole-2,3-dione (1.0 g, 3.0 mmol) and anhydrous dichloromethane (10 mL) were added. The reaction mixture was allowed to stir for 19 h at ambient temperature. The reaction mixture was concentrated in vacuo and was diluted with saturated aqueous ammonium chloride (30 mL) and ethyl acetate (30 mL). The phases were separated and the aqueous phase was extracted with ethyl acetate (2×50 mL). The combined organic extracts were washed with brine (100 mL), dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by column chromatography and eluted with a 8% to 66% gradient of ethyl acetate in hexanes to afford 1-(diphenylmethyl)-7-fluoro-3-hydroxy-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-1,3-dihydro-2H-indol-2-one (1.22 g, 84%) as an off-white solid: MS (ES+) m/z 475.0 (M−17).

Workup

  1. temperatureTo a cooled
  2. stirringto stir for 19 h at ambient temperature
  3. concentrationThe reaction mixture was concentrated in vacuo
  4. additionwas diluted with saturated aqueous ammonium chloride (30 mL) and ethyl acetate (30 mL)
  5. customThe phases were separated
  6. extractionthe aqueous phase was extracted with ethyl acetate (2×50 mL)
  7. washThe combined organic extracts were washed with brine (100 mL)
  8. dry with materialdried over anhydrous sodium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated in vacuo
  11. customThe crude product was purified by column chromatography
  12. washeluted with a 8% to 66% gradient of ethyl acetate in hexanes

Sources & evidence

ORD record
ord-5d46a4cd13dd4ec2b0a2bbe6f28998f2
Source dataset
uspto-grants-2014_12
Patent number
US08916580B2

Reaction notes

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