Reaktion #613577

Reaktionsgleichung

4-bromo-2-methoxypyridine

(2-ethoxy-2-oxoethyl)zinc(II) bromide

→

ethyl 2-(2-methoxypyridin-4-yl)acetate

Ausbeute 38.5%

Lösungsmittel

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   FiltrationThe reaction was filtered through a course glass frit
2. 2
   Einengenconcentrated to an oil
3. 3
   Sonstigepurified via flash chromatography (100 g silica gel using a 5% to 50% EtOAc in heptane gradient)
4. 4
   Einengenconcentrated

Vorschrift

Combined 4-bromo-2-methoxypyridine (654 μl, 5.32 mmol), (2-ethoxy-2-oxoethyl)zinc(II) bromide (5850 μl, 5.85 mmol), and Pd(PPh3)4 catalyst (615 mg, 0.532 mmol) in THF (15.2 mL) and heated to 120° C. in a microwave for 5 minutes. The reaction was filtered through a course glass frit, concentrated to an oil and purified via flash chromatography (100 g silica gel using a 5% to 50% EtOAc in heptane gradient). The appropriate fractions were combined and concentrated to acquire ethyl 2-(2-methoxypyridin-4-yl)acetate (400 mg, 38.5% yield) as a colorless oil. MS m/z [M+H]+ 196.1.

Quelle