Syntheses of Ferrocenyl Schiff Bases Using Molecular Sieves and AlCl₃ as Catalysts

In order to study the donor ability of ferrocenylimines as directing ortho metalation group（DMG） to lithium alkylide to prepare planar chiral ferrocene, a series of ferrocenyl schiff bases were synthesized by new methods using molecular sieves（0.4?nm） and AlCl₃ as catalysts. The reaction periods were reduced using these two catalysts in contrast with Al₂O₃, which was a traditional method used in the literature. In addition, as an important feature of these schiff bases, we found that they were unstable as oils in air or when filtrated through silica gel, but were stable as solids. The structures of the new compounds were confirmed by IR, 1H NMR and HRMS.