Reaktion #327685

Reaktionsgleichung

product

(3aR,6aS)-tert-butyl hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate

ethyl 5-bromonicotinate

cesium carbonate

→

title compound

Ausbeute 94.0%

(3aR,6aS)-tert-butyl 5-(5-(ethoxycarbonyl)pyridin-3-yl)hexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate

Ausbeute 94.0%

Lösungsmittel

dioxane

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction mixture was cooled
2. 2
   Filtrationfiltered through a glass frit
3. 3
   EinengenThe filtrate was concentrated
4. 4
   Sonstigethe residue was purified by silica gel chromatography (eluted with 50% EtOAc in hexane)

Vorschrift

A suspension of the product from Example 1C (2.00 g, 9.42 mmol), ethyl 5-bromonicotinate (2.80 g, 12.0 mmol), tris(dibenzylideneacetone)dipalladium(0) (259 mg, 0.283 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (491 mg, 0.848 mmol) and cesium carbonate (4.91 g, 15.1 mmol) in anhydrous dioxane (50 mL) were heated at 90° C. for 72 hours. The reaction mixture was cooled and filtered through a glass frit. The filtrate was concentrated and the residue was purified by silica gel chromatography (eluted with 50% EtOAc in hexane) to afford the title compound (3.2 g, 94%). MS (APCI) m/z 362 (M+H)+.

Quelle