Reaktion #793435

Reaktionsgleichung

[(1-chloro-4-hydroxy-6,7-diphenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid

N,N-dimethylacetamide

→

title compound

[(1-Cyano-4-hydroxy-6,7-diphenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid

Lösungsmittel

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstige[(1-Cyano-4-hydroxy-6,7-diphenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid was prepared
2. 2
   Extraktionextracted three times with aqueous sodium bicarbonate
3. 3
   Extraktionextracted three times with ethyl acetate
4. 4
   TrocknenThe organic extracts were dried over sodium sulfate
5. 5
   Einengenconcentrated

Vorschrift

[(1-Cyano-4-hydroxy-6,7-diphenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid was prepared by adding 76 mg (0.164 mmol) of [(1-chloro-4-hydroxy-6,7-diphenoxy-isoquinoline-3-carbonyl)-amino]-acetic acid (prepared according to US 2006/0217416), 7.3 mg (0.008 mmol) tris(dibenzylideneacetone)dipalladium(0), 9.0 mg (0.016 mmol) 1,1′-bis(diphenylphosphino) ferrocene, 1.3 mg (0.020 mmol) zinc dust, and 12 mg (0.10 mmol) zinc cyanide to 0.35 mL of N,N-dimethylacetamide. The resultant mixture was heated at 115° C. for 3 hours under a nitrogen atmosphere, and then cooled to room temperature. The mixture was diluted with ethyl acetate and extracted three times with aqueous sodium bicarbonate and twice with 1 N NaOH solutions. The basic aqueous extracts were acidified with concentrated HCl, and extracted three times with ethyl acetate. The organic extracts were dried over sodium sulfate and concentrated to give 29 mg of the title compound as a white solid; MS (ESI−): m/z 454.0 (M−1)

Quelle