1,2-Dimethoxyethane → 6-(4-(Methylsulfonyl)phenyl)pyridin-3-ol

HRID 423545Notes

Reaction equation

HRID 423545 reaction equation
Br[C:2]1[N:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=1.[CH3:9][S:10]([C:13]1[CH:18]=[CH:17][C:16](B(O)O)=[CH:15][CH:14]=1)(=[O:12])=[O:11].C([O-])([O-])=O.[Na+].[Na+].COCCOC>ClCCl.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>[CH3:9][S:10]([C:13]1[CH:18]=[CH:17][C:16]([C:2]2[N:7]=[CH:6][C:5]([OH:8])=[CH:4][CH:3]=2)=[CH:15][CH:14]=1)(=[O:12])=[O:11]

Participants

8

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 27343644-(Methanesulfonyl)phenylboronic acidHCID 27628652-Bromo-5-hydroxypyridine

Product 1

HCID 532295926-(4-(Methylsulfonyl)phenyl)pyridin-3-olYield 138%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 6-bromo-3-pyridinol (36 g, 207 mmol), [4-(methylsulfonyl)phenyl]boronic acid (50 g, 250 mmol), 2M Na2CO3 (315 mL) and DME (500 mL) was degassed with N2 for 30 min, and then Pd(PPh3)4 (12 g, 10 mmol) was added and the mixture was heated at 80° C. for 18 h. The reaction was allowed to cool to room temperature and was diluted with dichloromethane (500 mL) and water (500 mL) and stirred for 30 min. The reaction was filtered and the solids were rinsed with dichloromethane and the aqueous layer was extracted with dichloromethane. The combined organic extracts were extracted with 1 N NaOH (2×600 mL), and then cooled to 5° C. and the pH was adjusted to ˜8 with 6N HCl. The resulting precipitate was collected by filtration (water wash) and air-dried to afford a yellow solid. This procedure was repeated and the solids were combined to provide (71.2 g, 68%) of 6-[4-(methylsulfonyl)phenyl]-3-pyridinol. 1H NMR (400 MHz, DMSO-d6): δ 10.27 (s, 1H), 8.25 (d, 1H, J=2.7 Hz), 8.21 (d, 2H, J=8.5 Hz), 8.00-3H), 7.27 (dd, 1H, Ja=8.7 Hz, Jb=2.8 Hz), 3.21 (s, 3H); LRMS (ESI), m/z 250 (M+H).

Workup

  1. customwas degassed with N2 for 30 min
  2. temperatureto cool to room temperature
  3. filtrationThe reaction was filtered
  4. washthe solids were rinsed with dichloromethane
  5. extractionthe aqueous layer was extracted with dichloromethane
  6. extractionThe combined organic extracts were extracted with 1 N NaOH (2×600 mL)
  7. temperaturecooled to 5° C.
  8. filtrationThe resulting precipitate was collected by filtration (water wash)
  9. customair-dried
  10. customto afford a yellow solid

Sources & evidence

ORD record
ord-5b88123ebbe64276b17c3044c7d3c4b6
Source dataset
uspto-grants-2012_01
Patent number
US08101634B2

Reaction notes

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