Abstract

An efficient and simple catalytic system has been developed for hydrogenation of carboxylic esters. Combination of commercially available Ru-salts and simple imidazolium salts bearing N-cyclohexyl, N-cycloheptyl and N-cyclooctyl substituents enable reduction of esters to alcohols at 40 °C and 40 bar of hydrogen pressure. The reaction protocol offers a practical access to alcohols using an easy operational setup.

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