Manganese catalyst of 8-hydroxy quinoline derivative and its uses in olefin epoxidation

Abstract

The invention discloses a manganese catalyst of 8-hydroxy quinoline derivant and application in the olefin epoxidised course, which is characterized by the following: the 8-hydroxy quinoline derivant of general formula (I) of catalyst is complex compound of ligand and magnesium ion, which forms general formula (II) or (III); the catalyst is reacted by olefin and hydrogen peroxide as oxidant in the solvent; the molar rate of catalyst is 0.5-5% corresponding to the molar rate of olefin.

Description

technical field [0001] The invention relates to a manganese catalyst of 8-hydroxyquinoline derivatives and its application in olefin epoxidation. Background technique [0002] Manganese is widely used as a catalyst in organic synthesis because of its cheapness, low toxicity, high activity and high selectivity, and has been used in the epoxidation of alkenes with hydrogen peroxide as an oxidant, but manganese ions have a strong decomposition of hydrogen peroxide capacity, resulting in very low utilization of hydrogen peroxide in the reaction process. People try to use various ligands to coordinate with manganese to improve the utilization rate of hydrogen peroxide, but the results are not very satisfactory. For example, the more Salen type manganese complexes reported at home and abroad are very effective catalysts for olefin epoxidation (a.E.N.Jacobsen, W.Zhang, A.R.Muci, J.R.Ecker, and L.Deng, J.Am.Chem.Soc., 1991,113,7063.b.Y.N.Ito and T.Katsuki, Bull.Chem.Soc.Jpn., 1999...

AI Technical Summary

Problems solved by technology

However, because the ligands of this catalyst are difficult to synthesize, the recovery is difficult, and relatively toxic dichloromethane or acetonitrile are used as solvents, so the practical value is not high.

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