Allylic and Benzylic Alcohol Coupling Reactions Catalyzed by Lithium-Promoted Manganese Oxides

Abstract

This study reports a novel methodology for the production of allyl acrylate from allyl alcohol solely as the starting substrate. The reaction reported here utilizes a heterogeneous reusable catalyst based on Li-ion-promoted mesoporous manganese oxide. The reaction conditions are mild (ambient pressure and temperature of 80 °C). The catalytic activity, selectivity, and substrate scope of the reaction are reported (60% yield). The system proposed here is composed of an allylic alcohol substrate, O2 as the oxidant, N-hydroxyphthalimide (NHPI) as the promoter, and trichloro acetonitrile (CCl3CN) as the solvent together with the Li-promoted manganese oxide (surface area >150 m2/g) as the catalyst.

Porous Aromatic Framework Covalently Embedded with N‐Hydroxyphthalimide as Metal‐free Heterogeneous Catalyst for Highly Efficient and Selective Aerobic Oxidation

“…[2] It is rational that heterogenization of homogeneous catalysts will readily engage the functionalities of the homogeneous and heterogeneous catalysts but often suffer from the insufficient accessible catalytic sites. [3,4] Thanks to the newly developed advanced materials including metal-organic frameworks (MOFs), [5][6][7] covalent organic frameworks (COFs), [8][9][10][11] conjugated microporous polymers (CMPs) [12][13][14] and porous aromatic frameworks (PAFs), [15,16] etc. which are characteristic of extremely large surface area and highly designable porosity, the state-of-the-art strategies are impregnable immobilization of the homogeneous catalytic sites onto the frameworks of these advanced porous materials without significant sacrifice of the specific surface areas, rendering the highly porous heterogeneous catalysts comparable or even superior efficiency to the homogeneous catalysts.…”