Sodium Carbonate → 6-(4-bromo-1-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-4-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine

HRID 331019Notes

Reaction equation

HRID 331019 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[N:8]([CH3:12])[CH:9]=[C:10](I)[C:3]=12.[CH3:13][N:14]1[CH2:19][CH2:18][O:17][C:16]2[CH:20]=[CH:21][C:22](B3OC(C)(C)C(C)(C)O3)=[CH:23][C:15]1=2.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.CO.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[Br:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[N:8]([CH3:12])[CH:9]=[C:10]([C:22]3[CH:21]=[CH:20][C:16]4[O:17][CH2:18][CH2:19][N:14]([CH3:13])[C:15]=4[CH:23]=3)[C:3]=12

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 547587584-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazineHCID 710901484-bromo-3-iodo-1-methyl-1H-pyrrolo[2,3-b]pyridine

Product 1

HCID 710901456-(4-bromo-1-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-4-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazineYield 32.3%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 887MethanolSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
60 °C

Procedure

Alternatively, to a mixture of 4-bromo-3-iodo-1-methyl-1H-pyrrolo[2,3-b]pyridine (D7) (1 g, 2.97 mmol), 4-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine (0.857 g, 3.12 mmol) in DME (18 mL) and MeOH (2.0 mL) was added bis(triphenylphosphine)palladium(II) chloride (0.208 g, 0.297 mmol) and 2M sodium carbonate aq. solution (14.84 mL, 29.7 mmol). The mixture was stirred at 60° C. for 1 hour. The mixture was cooled to RT and filtered. The solid was washed with excess ethyl acetate and the filtrate concentrated in vacuo. The residue aqueous was extracted with ethyl acetate (4×200 mL). The combined organics were dried over magnesium sulfate, filtered and concentrated. The residue was purified on normal phase chromatography eluting with a gradient of 0-30% ethyl acetate in cyclohexane to give the title compound (344 mg). LCMS (A): m/z (M+H)+ 358/360, C17H16BrN3O requires 357/359 (acidic).

Workup

  1. temperatureThe mixture was cooled to RT
  2. filtrationfiltered
  3. washThe solid was washed with excess ethyl acetate
  4. concentrationthe filtrate concentrated in vacuo
  5. extractionThe residue aqueous was extracted with ethyl acetate (4×200 mL)
  6. dry with materialThe combined organics were dried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe residue was purified on normal phase chromatography
  10. washeluting with a gradient of 0-30% ethyl acetate in cyclohexane

Sources & evidence

ORD record
ord-6d4cd7e6f00c4e97a19a3fb5825dd1fd
Source dataset
uspto-grants-2014_11
Patent number
US08877742B2

Reaction notes

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