Sodium Carbonate → HCID 178506261, compound

HRID 1468090Notes

Reaction equation

HRID 1468090 reaction equation
[Cl:1][C:2]1[C:14](I)=[CH:13][C:5]2[NH:6][C:7]([C:9]([F:12])([F:11])[F:10])=[N:8][C:4]=2[CH:3]=1.[Cl:16][C:17]1[CH:22]=[CH:21][C:20](B(O)O)=[CH:19][CH:18]=1.C(=O)([O-])[O-].[Na+].[Na+].O1CCOCC1>O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:1][C:2]1[C:14]([C:20]2[CH:21]=[CH:22][C:17]([Cl:16])=[CH:18][CH:19]=2)=[CH:13][C:5]2[NH:6][C:7]([C:9]([F:12])([F:11])[F:10])=[N:8][C:4]=2[CH:3]=1

Participants

7

Reactant 4

HCID 10340Sodium CarbonateHCID 312751,4-DioxaneHCID 742994-Chlorophenylboronic acidHCID 178506268HCID 178506268, compound

Product 1

HCID 178506261HCID 178506261, compound

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×

Conditions

Temperature
100 °C

Procedure

Compound number 130 (i.e., 6-chloro-5-(4-chlorophenyl)-2-trifluoromethylbenzimidazole was prepared as follows. A 250-mL round-bottom flask was purged and maintained with an inert atmosphere of nitrogen. 5-chloro-6-iodo-2-(trifluoromethyl)-1H-1,3-benzodiazole (400 mg, 1.15 mmol, 1.00 equiv), (4-chlorophenyl)boronic acid (359 mg, 2.30 mmol, 1.99 equiv), sodium carbonate (380 mg), dioxane (40 mL), Pd(PPh3)4 (67 mg), and water (10 mL) was placed in the flask. The resulting solution was stirred for 4 h at 100° C. in an oil bath. The mixture was cooled. The resulting solution was diluted with 100 mL of H2O. The resulting solution was extracted with 3×100 mL of ethyl acetate and the organic layers combined. The resulting mixture was washed with 1×100 mL of brine (sat.). The combined organic layer was dried over anhydrous sodium sulfate and concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:30). This resulted in 34.9 mg (9%) of 6-chloro-5-(4-chlorophenyl)-2-trifluoromethylbenzimidazole as a white solid.

Workup

  1. customA 250-mL round-bottom flask was purged
  2. temperaturemaintained with an inert atmosphere of nitrogen
  3. temperatureThe mixture was cooled
  4. extractionThe resulting solution was extracted with 3×100 mL of ethyl acetate
  5. washThe resulting mixture was washed with 1×100 mL of brine (sat.)
  6. dry with materialThe combined organic layer was dried over anhydrous sodium sulfate
  7. concentrationconcentrated under vacuum
  8. customThis resulted in 34.9 mg (9%) of 6-chloro-5-(4-chlorophenyl)-2-trifluoromethylbenzimidazole as a white solid

Sources & evidence

ORD record
ord-488d054a0f30446a860302d2db540967
Source dataset
uspto-grants-2015_04
Patent number
US09000187B2

Reaction notes

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