Reaktion #998071

Reaktionsgleichung

2-amino-4-methylthiazole

4-(benzyloxy)-2-chloropyridine

potassium phosphate

toluene

→

4-(benzyloxy)-N-(4-methylthiazol-2-yl)pyridin-2-amine

Ausbeute 48.0%

Lösungsmittel

Water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe reaction mixture was degassed with nitrogen
2. 2
   Sonstigethe reaction mixture was degassed with nitrogen
3. 3
   Sonstigedegassed water (15 mL)
4. 4
   workup.ADDITIONwas added
5. 5
   Sonstigereaction mixture
6. 6
   Extraktionthe reaction mixture was extracted with ethyl acetate
7. 7
   TrocknenThe organic layer was dried over magnesium sulfate
8. 8
   Filtrationfiltered through a small plug of silica gel
9. 9
   Einengenthe filtrate was concentrated down to 50 mL of ethyl acetate
10. 10
    Filtrationfiltered

Vorschrift

A 250 mL round-bottomed flask was charged with 2-amino-4-methylthiazole (43.8 mL, 17.5 mmol), 4-(benzyloxy)-2-chloropyridine (4.23 g, 19.3 mmol), potassium phosphate (4.09 g, 19.3 mmol), and toluene (44 mL), and the reaction mixture was degassed with nitrogen. Tris(dibenzylideneacetone)-dipalladium (0) (0.401 g, 0.438 mmol) and 9,9-dimethyl-4,5-bis(diphenyl-phosphino)-xanthene (0.279 g, 0.482 mmol) were added, and the reaction mixture was degassed with nitrogen. The reaction mixture was warmed to 90° C., degassed water (15 mL) was added, and reaction mixture was stirred at 90° C. overnight. Water was added, and the reaction mixture was extracted with ethyl acetate. The organic layer was dried over magnesium sulfate and filtered through a small plug of silica gel, and the filtrate was concentrated down to 50 mL of ethyl acetate and filtered to afford 4-(benzyloxy)-N-(4-methylthiazol-2-yl)pyridin-2-amine (2.50 g, 47.5% yield) as a white solid. 1H NMR (CDCl3) δ 9.29 (bs, 1H), 8.15 (d, 1H), 7.39 (m, 4H), 7.35 (m, 1H), 6.53 (dd, 1H), 6.41 (d, 1H), 6.36 (d, 1H), 5.07 (s, 2H), 2.33 (s, 3H). Mass spectrum (esi) m/z=298 (M

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