An efficient method for the transformation of naturally occurring monoterpenes into amines through rhodium-catalyzed hydroaminomethylation
作者:Daniela S. Melo、Schubert S. Pereira-Júnior、Eduardo N. dos Santos
DOI:10.1016/j.apcata.2011.10.021
日期:2012.1
The hydroaminomethylation (hydroformylation/reductive amination) of the naturally occurring monoterpenes, i.e., limonene, camphene, and beta-pinene, was studied having as condensation counterparts the amines di-n-butylamine, morpholine or n-butylamine. Moderate to good yields (75-94%) were obtained employing [Rh(cod)(mu-OMe)](2) as pre-catalyst in the presence or not of triphenylphosphine or tribenzylphosphine as ancillaries in toluene, at 100 degrees C and 60 bar of an equimolar mixture of carbon monoxide and hydrogen. Some of the hydroaminomethylation products derived from limonene have biological activity and the products derived from camphene and beta-pinene are new. (C) 2011 Elsevier BM. All rights reserved.
Anisole: a further step to sustainable hydroformylation
作者:Fábio G. Delolo、Eduardo N. dos Santos、Elena V. Gusevskaya
DOI:10.1039/c8gc03750g
日期:——
Hydroformylation, also known as the “oxo” process, is a major industrial process that employs rhodium or cobalt catalysts in solution; therefore the solvent of this process is a critical issue for its sustainability. Although several innovative solutions have been proposed recently, traditional fossil-derived solvents dominate the scenario for this reaction. In this paper, we studied a series of solvents