An efficient synthesis of hexahydrobenzo[b]phenanthrolines is described. These compounds are prepared by the reaction of anilines with the prenylated derivatives of 2-, 3- and 4-pyridine carboxaldehydes. This reaction is catalyzed by both 5% TFA and 1% Yb(OTf)3 in MeCN to furnish the targeted products as a 1:1 mixture of diastereomers in a high yields (63-89%).
本文介绍了一种高效合成六
氢苯并[b]
菲罗啉的方法。这些化合物是通过
苯胺与 2-、3-和 4-
吡啶羧醛的预炔化衍
生物反应制备的。该反应在 MeCN 中的 5% T
FA 和 1% Yb(OTf)3 催化下,以非对映异构体 1:1 混合物的形式得到目标产物,收率高达 63-89%。