反应详情

温度

45 °C

A mixture of 20.0 g of (0.21 moles) 2-pyrrolecarboxaldehyde, 71.4 mL of (0.52 moles) o-bromoacetophenone, 72 mL of 1N potassium hydroxide and 800 mL of water was placed in a flask under nitrogen and heated to 45° C. for 72 hr. The reaction was cooled in an ice bath until a solid formed. The solid was taken up in methylcyclohexane/EtOAc, dried over 4A sieves and allowed to cool. The resulting solid was recrystallized from methylcyclohexane/EtOAc to give 43.5 g of 1-(2-bromophenyl)-3-(1H-pyrrol-2-yl)-2-propen-1-one as a yellow solid (75%), mp 76°-78° C.

1. customwas placed in a flask under nitrogen
2. temperatureThe reaction was cooled in an ice bath until a solid
3. customformed
4. dry with materialdried over 4A sieves
5. temperatureto cool
6. customThe resulting solid was recrystallized from methylcyclohexane/EtOAc