通过一锅法,通过芳基溴化物与n- BuLi的反应,然后与芳族醛或脂族醛的反应,以及随后用分子碘和K 2 CO 3的处理,可以有效地以高收率高效地制备芳族酮。芳烃的相同处理而不是芳族溴化物也以良好的产率提供了相应的芳族酮。使用这些方法,可以通过简单,无过渡金属且因此对环境无害的实验程序有效地制备各种带有富电子芳族化合物和缺电子芳族化合物的二芳基酮和烷基芳基酮。
Accelerated Zincations for an Efficient and Mild Functionalization of Aromatics and Heterocycles
作者:Andreas Unsinn、Stefan H. Wunderlich、Paul Knochel
DOI:10.1002/adsc.201300049
日期:2013.3.25
process for the preparation of aromatic and heteroaromatic diorganozincreagents and their subsequent reaction with electrophiles is presented. The new method, featuring the use of a 2,2,6,6‐tetramethylpiperidyl (TMP) magnesium base in the presence of zinc chloride (ZnCl2), is superior to the previous methods, which require the preparation of zinc bases. Specifically, the shorter reaction times under mild