Potassium Carbonate → 2-(3-Methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester

HRID 2426495Notes

Reaction equation

HRID 2426495 reaction equation
I[C:2]1[CH:7]=[C:6]([C:8]2[CH:13]=[CH:12][N:11]=[CH:10][CH:9]=2)[N:5]=[N:4][C:3]=1[O:14][CH3:15].[C:16]([O:20][C:21]([N:23]1[C:31]2[C:26](=[CH:27][CH:28]=[CH:29][CH:30]=2)[CH:25]=[C:24]1B(O)O)=[O:22])([CH3:19])([CH3:18])[CH3:17].C(=O)([O-])[O-].[K+].[K+].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>COCCOC.O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.C(OCC)(=O)C>[C:16]([O:20][C:21]([N:23]1[C:31]2[C:26](=[CH:27][CH:28]=[CH:29][CH:30]=2)[CH:25]=[C:24]1[C:2]1[CH:7]=[C:6]([C:8]2[CH:13]=[CH:12][N:11]=[CH:10][CH:9]=2)[N:5]=[N:4][C:3]=1[O:14][CH3:15])=[O:22])([CH3:19])([CH3:17])[CH3:18]

Participants

9

Reactant 4

HCID 11430Potassium CarbonateHCID 11776TriphenylphosphineHCID 27733021-(tert-Butoxycarbonyl)indole-2-boronic Acid (contains varying amounts of Anhydride)HCID 230924634-Iodo-3-methoxy-6-pyridin-4-yl-pyridazine

Product 1

HCID 671488572-(3-Methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

Argon is passed for 30 min through a suspension of 55 mg 4-Iodo-3-methoxy-6-pyridin-4-yl-pyridazine, 55 mg 1-(tert-butoxycarbonyl)indole-2-boronic acid, 53.5 mg potassium carbonate, and 18.5 mg triphenylphosphine in 0.8 ml DME and 0.7 ml water. 4 mg palladium (II) acetate is added, and the mixture is stirred under reflux for 3 h. The product is isolated by extraction with ethyl acetate and purified by chromatography on silica gel yielding 27.5 mg 2-(3-Methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester.

Workup

  1. temperatureunder reflux for 3 h
  2. custompurified by chromatography on silica gel yielding 27.5 mg 2-(3-Methoxy-6-pyridin-4-yl-pyridazin-4-yl)-indole-1-carboxylic acid tert-butyl ester

Sources & evidence

ORD record
ord-5f64daaed0774b7892f2e2dfc057f857
Source dataset
uspto-grants-2011_06
Patent number
US07968546B2

Reaction notes

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