The oxidative magnesiation of nitrogen-containing pi-deficient halogenoheteroaromatics using active magnesium was accomplished. Both magnesiation followed by addition of a carbonyl compound (Grignard reaction) and magnesiation in the presence of a carbonyl compound (Barbier reaction) were carried out to afford the corresponding product. Especially, the latter method enabled fused halogenodiazines such
使用活性
镁完成了含氮pi不足的卤代杂环
芳烃的氧化放大作用。进行
镁的放大,然后添加羰基化合物(格氏反应),以及在羰基的化合物存在下进行
镁的放大(Barbier反应),得到相应的产物。特别地,后一种方法使稠合的卤素二嗪例如4-
氯-1-苯基-1H-
吡唑并[3,4-d]
嘧啶或2-
氯喹喔啉在温和的温度(-20至30℃)下
氧化镁。