Potassium Carbonate → HCID 178493158, compound

HRID 1179419Notes

Reaction equation

HRID 1179419 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[NH:9][S:10]([C:13]1[CH:18]=[CH:17][C:16](Br)=[CH:15][CH:14]=1)(=[O:12])=[O:11].C([O-])(=O)C.[K+].[CH3:25][O:26][C:27]1[CH:32]=[CH:31][N:30]=[C:29]([CH2:33][CH2:34][C:35]2[NH:44][C:38]3=[N:39][CH:40]=[C:41](I)[CH:42]=[C:37]3[N:36]=2)[CH:28]=1.C(=O)([O-])[O-].[K+].[K+].[Cl-].[Li+]>O1CCOCC1.O.C1(P(C2C=CC=CC=2)[C-]2C=CC=C2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2].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].[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:25][O:26][C:27]1[CH:32]=[CH:31][N:30]=[C:29]([CH2:33][CH2:34][C:35]2[NH:44][C:38]3=[N:39][CH:40]=[C:41]([C:16]4[CH:17]=[CH:18][C:13]([S:10]([NH:9][C:4]5[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=5[O:2][CH3:1])(=[O:12])=[O:11])=[CH:14][CH:15]=4)[CH:42]=[C:37]3[N:36]=2)[CH:28]=1

Participants

11

Reactant 5

HCID 11430Potassium CarbonateHCID 433294Lithium ChlorideHCID 517044Potassium AcetateHCID 7107234-BroMo-N-(2-Methoxyphenyl)benzenesulfonaMideHCID 178493175HCID 178493175, compound2×

Product 1

HCID 178493158HCID 178493158, compoundYield 27.8%

Reagents, catalysts & solvents 5

HCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent2×

Conditions

Temperature
90 °C

Procedure

A mixture of 0.513 g of N-(2-methoxyphenyl)-4-bromo-benzenesulfonamide, 0.42 g of bis-(pinacolato)-diboron, 0.025 g of 1,1′-bis-(diphenylphosphino)-ferrocene, 0.033 g of [1,1′-bis(diphenylphosphino)-ferrocene]palladium-dichloride (complex with CH2Cl2), 0.442 g of potassium acetate in 6 ml of degassed dioxane are heated to 90° C. in a sealed tube under N2for 17 hours. To the resulting mixture 5 ml of degassed dioxane, 0.371 g of 2-[2-(4-methoxypyridin-2-yl)ethyl]-6-iodo-3H-imidazo[4,5-b]pyridine (starting material A1), 0.113 g of tetrakis(triphenylphosphine)-palladium(0) and a solution of 0.27 g of potassium carbonate and 0.083 g of lithium chloride in 5 ml of degassed water are added under N2. The tube is sealed again, the mixture is heated to 115° under N2 for 19 hours and, after cooling, addition of water and adjusting the pH to 7, it is extracted three times with dichloromethane. The combined organic phases are dried over sodium sulfate, concentrated and the residue is chromatographed on a silica gel column (dichloromethane/methanol 28-20:1). Concentration of the chromatographically pure fractions and crystallisation from ethylacetate gives 0.14 g of the title compound as a solid of m.p. 215-216° C. The mass spectrum shows the molecular peak MH+ at 516.3 Da.

Workup

  1. customThe tube is sealed again
  2. temperaturethe mixture is heated to 115° under N2 for 19 hours
  3. temperatureafter cooling
  4. extractionis extracted three times with dichloromethane
  5. dry with materialThe combined organic phases are dried over sodium sulfate
  6. concentrationconcentrated
  7. customthe residue is chromatographed on a silica gel column (dichloromethane/methanol 28-20:1)
  8. customConcentration of the chromatographically pure fractions and crystallisation from ethylacetate

Sources & evidence

ORD record
ord-f9968b3feeb04a598a132e3eeb3145d8
Source dataset
uspto-grants-2007_10
Patent number
US07279488B2

Reaction notes

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