Methoxycarbonylation of diisobutylene into methyl isononanoate catalyzed by cobalt complexes supported with porous organic polymers

Porous organic polymers (POLs) bearing pyridine or imidazole onto which a single-Co-site catalyst (Co@POLs) was embedded ionically were evaluated in heterogeneous diisobutylene (DIB) methoxycarbonylation. In this study, structural characterization of POLs was characterized using scanning electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis, and N2 adsorption–desorption isotherms. In addition, the catalytic activity of Co@POLs in DIB methoxycarbonylation with CO and methanol was investigated. In particular, Co2(CO)8@VPy–DVB(2:1) exhibited increased DIB conversion (89.3%), methyl 3,3,5-trimethylhexanate selectivity (92.2%) at 8.0 MPa and 150 °C for 12 h, Additionally, Co2(CO)8@VPy–DVB(2:1) was utilized as a catalyst to investigate the impact of various parameters on the reaction, the catalyst exhibited high recovery ability and thermostability. Several porous organic polymers (POLs) bearing pyridine or imidazole onto which a single-Co-site catalyst (Co@POLs) was embedded ionically were characterized and applied as catalysts in heterogeneous diisobutylene methoxycarbonylation with CO and methanol. Among the tested catalysts, Co2(CO)8@VPy–DVB(2:1) with microporous structure exhibited the highest activity. The influences of catalytic reaction parameters including catalyst concentration, materials ratios, temperature, and reaction time have also been investigated in detail. Moreover, the reaction scope was extended to different terminal olefins. In addition, the catalyst Co2(CO)8@VPy–DVB(2:1) was found to be reusable four times without any loss of catalytic activity. [Display omitted]