Method for preparing aromatic ketone or aromatic aldehyde by selectively oxidizing alkyl arene

Abstract

A non-metallic catalytic system with pyramine compound, molecule bromine and N-hydroxy-o-dimethyl-acylimine is prepared by catalyzing aryl radical oxide with molecular oxygen as oxygen source to generate aryl ketone or aryl aldehyde under gentle condition and oxidation reacting selectively. It costs low, is non-toxic and has less environmental pollution.

Description

technical field [0001] The invention relates to a catalyst system for catalyzing the benzylic selective oxidation reaction of various aromatic hydrocarbons, in particular, it provides a catalyst system composed of small organic molecules that can be used to directly and efficiently oxidize aromatic hydrocarbons into aromatic ketones or aromatic aldehydes Non-metallic catalytic system, which can generate organic free radicals with high activation function to activate the C-H bond and oxygen molecules of aromatic hydrocarbons, so as to realize the efficient oxidation process of aromatic hydrocarbons. Background technique [0002] The benzylic selective oxidation of aromatic hydrocarbons is an important transformation process in organic chemistry. The products obtained from aromatic ketones and aromatic aldehydes are widely used fine chemical products and intermediates in the synthesis of natural products; the traditional oxidation method mainly uses metering Oxidation of aroma...

AI Technical Summary

Problems solved by technology

[0002] The benzylic selective oxidation of aromatic hydrocarbons is an important transformation process in organic chemistry. The products obtained from aromatic ketones and aromatic aldehydes are widely used fine chemical products and intermediates in the synthesis of natural products; the traditional oxidation method mainly uses metering Oxidation of aromatic hydrocarbons by manganese dioxide, dichromic acid and other oxidants is serious pollution and poor atom economy; in recent years, green catalytic processes using hydrogen peroxide and molecular oxygen as oxidants have begun to attract attention is the most competitive route

In this research field, most of the catalysts currently used are transition metal compounds (J.Mol.Catal.A: Chemical, 2003, 201, 9-22; Adv.Synth.Catal.2005, 347, 703-705), Such systems often have disadvantages such as high reaction temperature and poor product selectivity.