问题描述：
英语翻译
Into a 250 mL threenecked,round-bottom flask equipped with a magnetic stirbar,a
nitrogen inlet,and a Dean–Stark trap were charged phenol (61.0
g,0.648 mol),toluene (60 mL),and KOH (30.3g,0.540 mol),and
the resulting mixture was heated at 145 °C for 3 h with water
collected in the Dean–Stark trap.Then,excess phenol and water
were removed under reduced pressure at 160°C for 3 h.Copper
(1.0 g),5-bromo-m-xylene (20.0 g,0.108 mol),and phenol (30 mL)
were added to the dry salt.
Into a 250 mL threenecked,round-bottom flask equipped with a magnetic stirbar,a
nitrogen inlet,and a Dean–Stark trap were charged phenol (61.0
g,0.648 mol),toluene (60 mL),and KOH (30.3g,0.540 mol),and
the resulting mixture was heated at 145 °C for 3 h with water
collected in the Dean–Stark trap.Then,excess phenol and water
were removed under reduced pressure at 160°C for 3 h.Copper
(1.0 g),5-bromo-m-xylene (20.0 g,0.108 mol),and phenol (30 mL)
were added to the dry salt.
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