反应详情

Palladium tetrakis(triphenylphosphine) (213 mg, 0.18 mmol) was added to a degassed, ambient temperature solution of ethyl 2-(4-bromobenzyl)-5-oxopyrrolidine-2-carboxylate (600 mg, 1.84 mmol), 2-bromo-5-fluoropyridine (324 mg, 1.84 mmol) and hexamethylditin (603 mg, 1.84 mmol) in 1,4-dioxane (8 mL). After stirring at reflux overnight, the reaction mixture was cooled and cesium fluoride (50% on celite) was added. After stirring vigorously for 1 h, the reaction mixture was filtered and concentrated in vacuo. Chromatography over silica eluting with 40-100% ethyl acetate/hexane afforded ethyl 2-[4-(5-fluoropyridin-2-yl)benzyl]-5-oxopyrrolidine-2-carboxylate.

1. temperatureat reflux overnight
2. temperaturethe reaction mixture was cooled
3. stirringAfter stirring vigorously for 1 h
4. filtrationthe reaction mixture was filtered
5. concentrationconcentrated in vacuo