1,4-Dioxane → (1H-benzo[d]imidazol-2-yl)(4-(3-(3,6-dihydro-2H-pyran-4-yl)pyridin-2-yloxy)phenyl)methanone

HRID 410201Notes

Reaction equation

HRID 410201 reaction equation
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[C:10]([C:12]1[CH:17]=[CH:16][C:15]([O:18][C:19]2[C:24](Br)=[CH:23][CH:22]=[CH:21][N:20]=2)=[CH:14][CH:13]=1)=[O:11].[O:26]1[CH2:31][CH:30]=[C:29](B2OC(C)(C)C(C)(C)O2)[CH2:28][CH2:27]1.C([O-])(=O)C.[K+].O1CCOCC1>CO.O>[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[C:10]([C:12]1[CH:17]=[CH:16][C:15]([O:18][C:19]2[C:24]([C:29]3[CH2:30][CH2:31][O:26][CH2:27][CH:28]=3)=[CH:23][CH:22]=[CH:21][N:20]=2)=[CH:14][CH:13]=1)=[O:11]

Participants

7

Reactant 4

HCID 312751,4-DioxaneHCID 517044Potassium AcetateHCID 112180533,6-Dihydro-2H-pyran-4-boronic acid pinacol esterHCID 59326957(1H-benzo[d]imidazol-2-yl)(4-(3-bromopyridin-2-yloxy)phenyl)methanone

Product 1

HCID 59327026(1H-benzo[d]imidazol-2-yl)(4-(3-(3,6-dihydro-2H-pyran-4-yl)pyridin-2-yloxy)phenyl)methanone

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Conditions

Temperature
100 °C

Procedure

A clear 150 ml pressure tube was charged with (1H-benzo[d]imidazol-2-yl)(4-(3-bromopyridin-2-yloxy)phenyl)methanone (1.5 g, 3.80 mmol), 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.959 g, 4.57 mmol), Bis-[4-(di-tert-butylphosphino)-N,N-dimethylbenzenamine]Palladium dichloride (2.69 g, 3.80 mmol), potassium acetate (0.373 g, 3.80 mmol), Dioxane (9 mL) and Water (1.000 mL). The reaction flask was flushed with nitrogen and capped. The reaction was heated to 100° C. for 16 hours. The reaction was then cooled down to RT and partitioned with ethyl acetate (50 ml) and water (50 ml). The organic layer was washed (2×) with an aqueous saturated solution of sodium bicarbonate, then with water and then brine. The organic layer was then dried with sodium sulfate and then filtered. The volatile were reduced to a smaller volume and the solid that precipitated out was filtered off. The cake obtained was suspended in hot MeOH, filtered and dried to give (1H-benzo[d]imidazol-2-yl)(4-(3-(3,6-dihydro-2H-pyran-4-yl)pyridin-2-yloxy)phenyl)methanone as a yellow solid. MS (ESI, pos. ion) m/z: 397.9 (M+1).

Workup

  1. customThe reaction flask was flushed with nitrogen
  2. customcapped
  3. temperatureThe reaction was then cooled down to RT
  4. custompartitioned with ethyl acetate (50 ml) and water (50 ml)
  5. washThe organic layer was washed (2×) with an aqueous saturated solution of sodium bicarbonate
  6. dry with materialThe organic layer was then dried with sodium sulfate
  7. filtrationfiltered
  8. customthe solid that precipitated out
  9. filtrationwas filtered off
  10. customThe cake obtained
  11. filtrationfiltered
  12. customdried

Sources & evidence

ORD record
ord-c067d518482f436cb3bb9103ec6bc407
Source dataset
uspto-grants-2014_06
Patent number
US08759532B2

Reaction notes

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