Add: A mixture of 124D ( 0.75 g , 2.9 mmol ) , iron ( 0.48 g , 8.6 mmol ) and ammonium chloride ( 0.46 g , 8.6 mmol ) in EtOH / H2O ( 10 mL / 3 mL ) 
Dissolve: ammonium chloride ( 0.46 g , 8.6 mmol ) in EtOH / H2O ( 10 mL / 3 mL ) 
Heat: was refluxed ( bath temperature 90 °C ) for 4 h 
Cool: After cooling to room temperature 
Add: the reaction mixture was diluted with water 
Extract: extracted with dichloromethane three times 
Dry: The combined organic phases were dried over Na2SO4 
Filter: filtered 
Concentrate: concentrated 
Yield: to give 124E as a oil 
