Direct Heterogenization of the Ru-Macho Catalyst for the Chemoselective Hydrogenation of α,β-Unsaturated Carbonyl Compounds

In this study, a commercially available homogeneous pincer-type complex, Ru-Macho, was directly heterogenized via the Lewis acid-catalyzed Friedel-Crafts reaction using dichloromethane as the cross-linker to obtain a heterogeneous, pincer-type Ru porous organometallic polymer (Ru-Macho-POMP) with a high surface area. Notably, Ru-Macho-POMP was demonstrated to be an efficient heterogeneous catalyst for the chemoselective hydrogenation of alpha,beta-unsaturated carbonyl compounds to their corresponding allylic alcohols using cinnamaldehyde as a model compound. The Ru-Macho-POMP catalyst showed a high turnover frequency (TOF = 920 h(-1)) and a high turnover number (TON = 2750), with high chemoselectivity (99%) and recyclability during the selective hydrogenation of alpha, beta-unsaturated carbonyl compounds.

Automated summary

In this study, a heterogeneous, pincer-type Ru porous organometallic polymer (Ru-Macho-POMP) with a high surface area was prepared via direct heterogenization of a commercially available homogeneous pincer-type complex, Ru-Macho, using dichloromethane as the cross-linker through a Lewis acid-catalyzed Friedel-Crafts reaction. The Ru-Macho-POMP catalyst demonstrated high turnover frequency (TOF = 920 h(-1)), high turnover number (TON = 2750), high chemoselectivity (99%), and recyclability during the selective hydrogenation of alpha, beta-unsaturated carbonyl compounds.