Potassium Carbonate → 2-(2-Methoxyethoxy)-5-(methoxymethoxy)pyridine

HRID 1471726Notes

Reaction equation

HRID 1471726 reaction equation
[CH3:1][O:2][CH2:3][O:4][C:5]1[CH:6]=[CH:7][C:8]([OH:11])=[N:9][CH:10]=1.C([O-])([O-])=O.[K+].[K+].Br[CH2:19][CH2:20][O:21][CH3:22]>CN(C=O)C>[CH3:22][O:21][CH2:20][CH2:19][O:11][C:8]1[CH:7]=[CH:6][C:5]([O:4][CH2:3][O:2][CH3:1])=[CH:10][N:9]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 809722-Bromoethyl methyl etherHCID 178498305HCID 178498305, compound

Product 1

HCID 866907672-(2-Methoxyethoxy)-5-(methoxymethoxy)pyridineYield 27%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

To a mixture of 5-(methoxymethoxy)pyridin-2-ol (1.35 g, 8.71 mmol, 1 eq.) and K2CO3 (6.01 g, 43.6 mmol, 5.0 eq.) in DMF (30.0 mL) was added 1-bromo-2-methoxyethane (3.61 g, 26.1 mmol, 3 eq.). The mixture was heated at 60° C. for 2 h, cooled, filtered, concentrated, and purified on silica gel using a mixture of EtOAc and hexanes as eluent to give 2-(2-methoxyethoxy)-5-(methoxymethoxy)pyridine (500 mg, 27%) as a colorless oil. 1H NMR (400 MHz, CDCl3) δ 7.94 (d, J=3.0 Hz, 1H), 7.35 (ddd, 18.9, 3.0, 1.0 Hz, 1H), 6.76 (dd, J=8.9, 1.0 Hz, 1H), 5.11 (s, 2H), 4.48-4.40 (m, 2H), 3.79-3.71 (m, 2H), 3.50 (s, 3H), 3.45 (s, 3H). LRMS (M+H+) m/z 214.1.

Workup

  1. temperaturecooled
  2. filtrationfiltered
  3. concentrationconcentrated
  4. custompurified on silica gel using
  5. additiona mixture of EtOAc and hexanes as eluent

Sources & evidence

ORD record
ord-05d4f7d3d4994b48b8df01d274f51585
Source dataset
uspto-grants-2015_04
Patent number
US09012450B2

Reaction notes

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