Facile reductive coupling of benzylic halides is reported with ferrous oxalate dihydrate in DMF or HMPA under nitrogen atmosphere at 155–160 °C. The coupling is proposed to proceed by two successive oxidative additions of benzylic halides to ferrous oxalate to give an intermediate organoiron complex which undergoes concerted dimerization to give the corresponding reductively coupled dimers in high yields.
报道称,在
氮气气氛下,使用二
水合
草酸亚铁在
DMF或HMPA中,于155-160°C的温度下,可以轻松实现
苄基卤化物的还原耦合反应。该耦合反应被认为是通过
苄基卤化物对
草酸亚铁的两次连续
氧化加成,生成一种
中间体有机铁配合物,该配合物随后经历协同二聚反应,以高产率得到相应的还原耦合二聚体。