An efficient one-pot approach to phenanthrene derivatives using a catalyzed tandem Ullmann-pinacol coupling reaction
作者:Shuang-zheng Lin、Tian-pa You
DOI:10.1016/j.tet.2008.08.004
日期:2008.10
In the presence of catalyst (Ph3P)2NiCl2 and reductant Zn, the Ullmann reactions of ortho-halo aryl aldehydes generate biaryl-dialdehydes and zinc halides. Subsequently, ZnX2 can catalyze the intramolecular pinacol coupling reaction of biaryl-dialdehydes to form 9,10-dihydrophenanthrene-9,10-diols. One-pot synthesis of 9-phenanthrols can be achieved using this strategy.
在催化剂(Ph 3 P)2 NiCl 2和还原剂Zn的存在下,邻卤代芳基醛的Ullmann反应生成联芳基二醛和卤化锌。随后,ZnX 2可以催化联芳基-二醛的分子内频哪醇偶联反应以形成9,10-二氢菲-9,10-二醇。使用该策略可以一锅合成9-菲咯啉。