A series of novel 4-ferrocenyl-1,2,3,4-tetrahydroquinolines were synthesized in high-to-excellent yields (up to 99%) starting from the corresponding ferrocenoylethyl aryl amines. These Mannich bases were reduced (NaBH₄) to the corresponding 3-(arylamino)-1-ferrocenylpropan-1-ols and submitted to an intramolecular cyclization prompted by acetic acid, proceeding via the corresponding α-ferrocenyl carbenium ion intermediates. Subsequently, the obtained tetrahydroquinolines were smoothly oxidized (aromatized) by means of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) to provide the corresponding 4-ferrocenylquinolines (up to 93%).

从相应的二茂铁酰基乙基芳基胺开始，以高至优异的产率（高达99％）合成了一系列新颖的4-二茂铁基-1,2,3,4-四氢喹啉。将这些曼尼希碱还原（NaBH ₄）为相应的3-（芳基氨基）-1-二茂铁基丙烷-1-醇，并通过乙酸进行分子内环化，然后通过相应的α-二茂铁基碳鎓离子中间体进行。随后，将所获得的四氢喹啉通过2，3-二氯-5，6-二氰基-1，4-苯醌（DDQ）平滑地氧化（芳香化），以提供相应的4-二茂铁基喹啉（至多93％）。