Dimethylformamide → 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 331018Notes

Reaction equation

HRID 331018 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+].CN(C=O)C>C(#N)C.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.Cl[Pd]Cl.C(Cl)Cl>[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

8

Reactant 4

HCID 6228DimethylformamideHCID 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 40.8%

Reagents, catalysts & solvents 3

HCID 6102075Dichlorobis(triphenylphosphine)palladiumCatalystHCID 6342AcetonitrileSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
55 °C

Procedure

To a suspension of 4-bromo-3-iodo-1-methyl-1H-pyrrolo[2,3-b]pyridine (D7) (300 mg, 0.890 mmol) and 4-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine (353 mg, 1.283 mmol) in ACN (2.5 mL) was added 2M sodium carbonate aqueous solution (4.72 mL, 9.43 mmol). DMF (4 mL) and DCM (3 mL) were added to aid the solubility. Then, bis(triphenylphosphine)palladium(II)chloride (81 mg, 0.116 mmol) was added and the reaction was stirred at 55° C. for 30 mins. Volatiles were removed by evaporation before partitioning between DCM and water. The organic layer was separated, dried and concentrated. The crude material was purified on silica eluting with gradient of 0-40% ethyl acetate in cyclohexane to afford the title compound (130 mg). LCMS (A): m/z (M+H)+ 358/360, C17H16BrN3O requires 357/359 (acidic).

Workup

  1. customVolatiles were removed by evaporation
  2. custombefore partitioning between DCM and water
  3. customThe organic layer was separated
  4. customdried
  5. concentrationconcentrated
  6. customThe crude material was purified on silica eluting with gradient of 0-40% ethyl acetate in cyclohexane

Sources & evidence

ORD record
ord-7b35ae86a6d149caa4e85bf45e555a4a
Source dataset
uspto-grants-2014_11
Patent number
US08877742B2

Reaction notes

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