Potassium Carbonate → HCID 86698811, compound

HRID 338475Notes

Reaction equation

HRID 338475 reaction equation
Br[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][C:10]=1[Cl:11])[NH:7][N:6]=[C:5]2[C:12]([OH:14])=[O:13].[O:15]1[C:19]2[CH:20]=[CH:21][C:22](B(O)O)=[CH:23][C:18]=2[CH2:17][CH2:16]1.C(=O)([O-])[O-].[K+].[K+]>CCO.C1(C)C=CC=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[Cl:11][C:10]1[CH:9]=[C:8]2[C:4]([C:5]([C:12]([OH:14])=[O:13])=[N:6][NH:7]2)=[CH:3][C:2]=1[C:22]1[CH:21]=[CH:20][C:19]2[O:15][CH2:16][CH2:17][C:18]=2[CH:23]=1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 2773380(2,3-Dihydro-1-benzofuran-5-yl)boronic acidHCID 866987915-bromo-6-chloro-1H-indazole-3-carboxylic acid

Product 1

HCID 86698811HCID 86698811, compoundYield 22%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 702EthanolSolventHCID 1140TolueneSolvent

Conditions

Temperature
130 °C

Procedure

To a solution of 5-bromo-6-chloro-1H-indazole-3-carboxylic acid (100 mg, 0.36 mmol), 2,3-dihydrobenzofuran-5-boronic acid (65.0 mg, 0.39 mmol) in EtOH (0.5 mL) and toluene (0.5 mL) was added 2N aqueous potassium carbonate solution (0.5 mL, 1.0 mmol). The reaction mixture was degassed with N2 for 5 minutes, treated with [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (14.7 mg, 0.018 mmol) and degassed with N2 for another 5 minutes. The suspension was sealed in a pressure tube and heated to 130° C. for 1 hour. As the reaction progressed, the suspension became clear, turned to orange and then dark brown. The reaction mixture was diluted with EtOAc (5 mL) and water (5 mL), and filtered through a syringe filter. The aqueous layer was acidified to pH 5 by 1N HCl solution, and extracted with EtOAc. The organic layer was dried over Na2SO4 and concentrated in vacuo. The crude material was purified by reverse phase HPLC (Column: Waters XBridge C18 19×100 mm, 5 μm; Mobile phase A: 0.03% NH4OH in water (v/v); Mobile phase B: 0.03% NH4OH in MeCN (v/v); 95.0% H2O/5.0% MeCN linear to 50.0% H2O/50.0% MeCN in 8.5 min, 50.0% H2O/50.0% MeCN linear to 0% H2O/100% MeCN in 0.5 min HOLD at 0% H2O/100% MeCN from 9.0 to 10.0 min. Flow: 25 mL/min) to provide the title compound (24.8 mg, 22% yield). MS (ES+) 315.1 (M+H)+. Retention time=2.68 minutes (Column: Waters Atlantis dC18 4.6×50 mm, 5 μm; Mobile phase A: 0.05% TFA in water (v/v); Mobile phase B: 0.05% TFA in MeCN (v/v); Gradient: 95:5 A:B linear to 5:95 A:B in 4.0 min, hold at 5:95 A:B to 5.0 min. Flow: 2 mL/min).

Workup

  1. customThe reaction mixture was degassed with N2 for 5 minutes
  2. customdegassed with N2 for another 5 minutes
  3. customThe suspension was sealed in a pressure tube
  4. additionThe reaction mixture was diluted with EtOAc (5 mL) and water (5 mL)
  5. filtrationfiltered through a syringe
  6. filtrationfilter
  7. extractionextracted with EtOAc
  8. dry with materialThe organic layer was dried over Na2SO4
  9. concentrationconcentrated in vacuo
  10. customThe crude material was purified by reverse phase HPLC (Column: Waters XBridge C18 19×100 mm, 5 μm; Mobile phase A: 0.03% NH4OH in water (v/v); Mobile phase B: 0.03% NH4OH in MeCN (v/v); 95.0% H2O/5.0% MeCN linear to 50.0% H2O/50.0% MeCN in 8.5 min, 50.0% H2O/50.0% MeCN linear to 0% H2O/100% MeCN in 0.5 min HOLD at 0% H2O/100% MeCN from 9.0 to 10.0 min. Flow: 25 mL/min)

Sources & evidence

ORD record
ord-dd58e0b019c24c0cb948735bb840496a
Source dataset
uspto-grants-2014_11
Patent number
US08889730B2

Reaction notes

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