Reaktion #83400

Reaktionsgleichung

meta-trifluoromethylphenol

sodium hydride

2,4-dichloro-6-(3-thienylmethyloxy)pyridine

water

→

4-chloro-2-(3-thienylmethyloxy)-6-(meta-trifluoromethylphenoxy)pyridine

Lösungsmittel

N,N-dimethylacetamide

N,N-dimethylacetamide

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturto cool
2. 2
   Sonstigethe mixture was partitioned
3. 3
   WaschenThe obtained organic layer was washed with aqueous saturated sodium chloride
4. 4
   Trocknendried over anhydrous sodium sulfate
5. 5
   workup.DISTILLATIONThe solvent was distilled off
6. 6
   Sonstigethe residue was purified successively on silica gel column chromatography and on reversed phase column chromatography (Lobar column, Lichroprep RP-18, 40-63 μm, elution solvent: CH3CN/H2O=7/3(v/v)), whereby the end product
7. 7
   Sonstigewas obtained

Vorschrift

To a solution of meta-trifluoromethylphenol (0.28 g, 0.0018×1.0 mol) in 10 ml of dry N,N-dimethylacetamide, sodium hydride (0.077 g, (ca.60% in mineral oil), 0.0018×1.1 mol) was added. After the bubbling ceased, a solution of 2,4-dichloro-6-(3-thienylmethyloxy)pyridine (0.46 g, 0.0018 mol) in 10 ml of dry N,N-dimethylacetamide was added dropwise and the resultant solution was stirred for about 7 hours at the temperature of 160° to 170° C. After allowed to cool, water was added to the reaction solution, then the mixture was partitioned by using ethyl acetate. The obtained organic layer was washed with aqueous saturated sodium chloride and dried over anhydrous sodium sulfate. The solvent was distilled off, then the residue was purified successively on silica gel column chromatography and on reversed phase column chromatography (Lobar column, Lichroprep RP-18, 40-63 μm, elution solvent: CH3CN/H2O=7/3(v/v)), whereby the end product was obtained.

Quelle