反应详情

Alternative Conditions. To a solution of sodium (169 mg, 7.35 mmol) dissolved in 2-ethoxyethanol (7.0 mL) was added 2,6-dichlorophenylacetonitrile (1.40 g, 7.53 mmol) and (IV) (502 mg, 3.66 mmol), and the mixture was then stirred at reflux for 30 minutes. The resulting solution was diluted with aqueous NaHCO3 (50 mL) and extracted with EtOAc (3×50 mL). The solvents were removed under reduced pressure, then chromatography of the residue on silica gel, eluting with 2-3% MeOH/CH2Cl2, gave firstly a mixed fraction, which on crystallisation from CHCl3 /light petroleum gave 2,6-dichlorophenylacetamide (165 mg): mp (MeOH/CH2Cl2) 211.5-213° C.

1. temperatureat reflux for 30 minutes
2. extractionextracted with EtOAc (3×50 mL)
3. customThe solvents were removed under reduced pressure
4. washchromatography of the residue on silica gel, eluting with 2-3% MeOH/CH2Cl2
5. customgave firstly a mixed fraction, which
6. customon crystallisation from CHCl3 /light petroleum