Hydrogenation of carboxylic esters catalyzed by manganese catalysts supported by bidentate NHC-phosphine ligands
Résumé
A series of bidentate manganese complexes with a general structure [(κ2C,P-R2PCH2CH2-NHC)Mn(CO)3Br] (NHC = N-substituted imidazolylidene) was prepared and fully characterized. These complexes were proven to be efficient catalysts for the hydrogenation of carboxylic ester derivatives with a low catalyst loading (0.5 mol%) in 2-Me-THF at 100 °C in the presence of KHBEt3. The generality of this hydrogenation was exemplified with more than 25 substrates. Experimental and computational investigations allowed to propose a rational mechanism involving an anionic tricarbonyl manganese hydride complex as the active species.
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Azouzi et al. - 2024 - Hydrogenation of carboxylic esters catalyzed by manganese catalysts.pdf (1.85 Mo)
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1-s2.0-S0021951724000472-mmc1.pdf (7.76 Mo)
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