Hydrochloric Acid → HCID 68598885, compound

HRID 1407503Notes

Reaction equation

HRID 1407503 reaction equation
[CH3:1][N:2]1[C:10]2[CH:9]=[C:8]3[O:11][CH2:12][CH2:13][O:14][C:7]3=[CH:6][C:5]=2[CH2:4][C:3]1=[O:15].[H-].[Na+].F[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[N+:25]([O-:27])=[O:26].Cl>CN(C)C=O>[CH3:1][N:2]1[C:10]2[CH:9]=[C:8]3[O:11][CH2:12][CH2:13][O:14][C:7]3=[CH:6][C:5]=2[CH:4]([C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=2[N+:25]([O-:27])=[O:26])[C:3]1=[O:15]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 24758Sodium hydrideHCID 738951-Fluoro-2-nitrobenzeneHCID 68597755HCID 68597755, compound

Product 1

HCID 68598885HCID 68598885, compoundYield 25.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a stirred solution of 6-methyl-2,3,6,8-tetrahydro-7H-[1,4]dioxino[2,3-f]indol-7-one (1.03 g, 5.01 mmol) in N,N-dimethylformamide (10 mL) was added sodium hydride (60% w/w dispersion in mineral oil, 0.26 g, 6.5 mmol) at 0° C. The reaction mixture was stirred at 0° C. for 30 min, 1-fluoro-2-nitrobenzene (0.70 mL, 6.6 mmol) was added and the mixture was stirred at ambient temperature for 18 h, 10% w/v hydrochloric acid (10 mL) was added at 0° C. and the mixture was extracted with ethyl acetate (3×50 mL). The combined organic extracts were washed with water and brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo. The residue was purified by column chromatography and eluted with ethyl acetate/hexanes (1/2) to afford 6-methyl-8-(2-nitrophenyl)-2,3,6,8-tetrahydro-7H-[1,4]dioxino[2,3-f]indol-7-one (0.41 g, 24%): 1H NMR (300 MHz, CDCl3) δ 8.05-8.01 (m, 1H), 7.58-7.51 (m, 1H), 7.49-7.42 (m, 1H), 7.23-7.19 (m, 1H), 6.69 (s, 1H), 6.45 (s, 1H), 5.28 (s, 1H), 4.28-4.18 (m, 4H), 3.21 (s, 3H).

Workup

  1. stirringthe mixture was stirred at ambient temperature for 18 h
  2. additionwas added at 0° C.
  3. extractionthe mixture was extracted with ethyl acetate (3×50 mL)
  4. washThe combined organic extracts were washed with water and brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated in vacuo
  8. customThe residue was purified by column chromatography
  9. washeluted with ethyl acetate/hexanes (1/2)

Sources & evidence

ORD record
ord-c1c3456395874004a5c79fdf3f7dafbd
Source dataset
uspto-grants-2014_12
Patent number
US08916580B2

Reaction notes

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