Potassium Carbonate → HCID 178493145, compound

HRID 1179408Notes

Reaction equation

HRID 1179408 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([S:8]([N:11]2[CH2:16][CH2:15][CH:14]([CH3:17])[CH2:13][CH2:12]2)(=[O:10])=[O:9])=[CH:4][CH:3]=1.C([O-])(=O)C.[K+].[CH3:23][O:24][C:25]1[CH:30]=[CH:29][N:28]=[C:27]([CH2:31][CH2:32][C:33]2[NH:42][C:36]3=[N:37][CH:38]=[C:39](I)[CH:40]=[C:35]3[N:34]=2)[CH:26]=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>[CH3:23][O:24][C:25]1[CH:30]=[CH:29][N:28]=[C:27]([CH2:31][CH2:32][C:33]2[NH:42][C:36]3=[N:37][CH:38]=[C:39]([C:2]4[CH:7]=[CH:6][C:5]([S:8]([N:11]5[CH2:16][CH2:15][CH:14]([CH3:17])[CH2:13][CH2:12]5)(=[O:10])=[O:9])=[CH:4][CH:3]=4)[CH:40]=[C:35]3[N:34]=2)[CH:26]=1

Participants

11

Reactant 5

HCID 11430Potassium CarbonateHCID 433294Lithium ChlorideHCID 517044Potassium AcetateHCID 31186541-(4-Bromophenylsulfonyl)-4-methylpiperidineHCID 178493175HCID 178493175, compound2×

Product 1

HCID 178493145HCID 178493145, compoundYield 41.8%

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
85 °C

Procedure

A mixture of 0.477 g of 1-(4-bromo-benzene-sulfonyl)-4-methyl-piperidine, 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 85° C. in a sealed tube under N2 for 6 hours. To the resulting mixture 5 ml of degassed dioxane, 0.342 g of 2-[2-(4-methoxypyridin-2-yl)ethyl]-6-iodo-3H-imidazo[4,5-b]pyridine (starting material A1), 0.104 g of tetrakis(triphenylphosphine)-palladium(0) and a solution of 0.25 g of potassium carbonate and 0.076 g of lithium chloride in 3 ml of degassed water are added under N2. The tube is sealed again, the mixture is heated to 110° under N2 for 17 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 and concentrated. Crystallization of the residue from ethylacetate and recrystallization from acetonitril gives 0.185 g of the title compound as a solid of m.p. 186-188° C. The mass spectrum shows the molecular peak MH+ at 492.4 Da.

Workup

  1. customThe tube is sealed again
  2. temperaturethe mixture is heated to 110° under N2 for 17 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. customCrystallization of the residue
  8. customfrom ethylacetate and recrystallization from acetonitril

Sources & evidence

ORD record
ord-1e4fa17eed5043b691ca0f6d011f6f8c
Source dataset
uspto-grants-2007_10
Patent number
US07279488B2

Reaction notes

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