A comprehensive investigation and optimisation on the proteinogenic amino acid catalysed homo aldol condensation
作者:Karoline A. Ostrowski、Dominik Lichte、Moritz Stuck、Andreas J. Vorholt
DOI:10.1016/j.tet.2015.11.069
日期:2016.2
A systematic investigation regarding the application of catalytic amounts of all 20 proteinogenic amino acids in the homo aldolcondensation of aldehydes is described obtaining excellent yields of the desired α,β-unsaturated aldehyde. These investigations proved the basic amino acids, lysine and arginine, are effective as organocatalysts, if comparably low concentrations are applied. Through the stepwise
Acid Catalysts Based on Mesoporous Aromatic Frameworks in Aldol Condensation of Furfural with Some Carbonyl Compounds
作者:M. Yu. Talanova、V. A. Yarchak、E. A. Karakhanov
DOI:10.1134/s107042721906017x
日期:2019.6
Aldol condensation of furfural with acetone and a series of aldehydes in the presence of PAF-SO3H acid catalyst based on mesoporous aromatic frameworks was studied. The reaction course depending on the process temperature, catalyst amount, and reactant ratio was studied for the furfural condensation with acetone as an example. The catalyst can be reused in several cycles without appreciable activity
Process Development for the Rhodium-Catalyzed Reductive Amination in a Thermomorphic Multiphase System
作者:Kai U. Künnemann、Jonas Bianga、Ricarda Scheel、Thomas Seidensticker、Jens M. Dreimann、Dieter Vogt
DOI:10.1021/acs.oprd.9b00409
日期:2020.1.17
and reuse the catalyst for the continuous process. After screening different solvents for the TMS and optimizing the reaction conditions in batch mode, the recycling of the rhodium catalyst was realized in a fully automated miniplant. Parameters influencing the stability of the process were identified and optimized to develop the continuous process. The process was operated in a steady state over 90 h
A green method for the self-aldol condensation of aldehydes using lysine
作者:Yutaka Watanabe、Kazue Sawada、Minoru Hayashi
DOI:10.1039/b918349c
日期:——
A self-condensation of aldehydes has been conveniently accomplished by the catalytic action of lysine in water or a solvent-free system under specific emulsion conditions to give α-branched α,β-unsaturated aldehydes in good yields.
Synthesis of Guerbet ionic liquids and extractants as β-branched biosourceable hydrophobes
作者:Giacomo Damilano、Koen Binnemans、Wim Dehaen
DOI:10.1039/c9ob02237f
日期:——
amines and β-branched quaternaryammonium chloride ionic liquids as novel extractants. The synthesis methodology was tailored to facilitate the reaction scale-up and the use of biorenewable starting materials. The developed process is an overall green, easy and straightforward synthesis of β-branched amines, and ammoniumsalts, starting from linear aldehydes. In order to evaluate the potential of the