Reaktion #366791

Reaktionsgleichung

potassium carbonate

Thionyl chloride

4-hydroxymethyl-2-methylpyridine

4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline

→

4-(4-chloro-2-fluoroanilino)-6-methoxy-7-((2-methyl-4-pyridyl)methoxy)quinazoline

Ausbeute 43.0%

Lösungsmittel

toluene

DMF

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe volatiles were removed by evaporation
2. 2
   Sonstigethe residue azeotroped with toluene
3. 3
   Sonstigedried under vacuum
4. 4
   Sonstigeto give crude 4-chloromethyl-2-methylpyridine hydrochloride which
5. 5
   Sonstige(prepared
6. 6
   Sonstigefor 90 hours
7. 7
   Filtrationthe precipitated solid collected by filtration
8. 8
   Waschenwashed with water
9. 9
   Sonstigedried

Vorschrift

Thionyl chloride (0.3 ml) was added to a solution of 4-hydroxymethyl-2-methylpyridine (240 mg, 1.9 mmol) in toluene (10 ml) and the mixture stirred at ambient temperature for 2 hours. The volatiles were removed by evaporation, the residue azeotroped with toluene and dried under vacuum to give crude 4-chloromethyl-2-methylpyridine hydrochloride which was used directly. This product was then added to a mixture of 4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (510 mg, 1.6 mmol), (prepared as described for the starting material in Example 24), and potassium carbonate (1.4 g 10 mmol) in DMF (8 ml) for 90 hours. The mixture was diluted with water and the precipitated solid collected by filtration, washed with water and dried to give 4-(4-chloro-2-fluoroanilino)-6-methoxy-7-((2-methyl-4-pyridyl)methoxy)quinazoline (290 mg, 43%), a sample was recrystallised from ethyl acetate/hexane.

Quelle