Biorenewable Deep Eutectic Solvent for Selective and Scalable Conversion of Furfural into Cyclopentenone Derivatives
作者:Maria Di Gioia、Monica Nardi、Paola Costanzo、Antonio De Nino、Loredana Maiuolo、Manuela Oliverio、Antonio Procopio
DOI:10.3390/molecules23081891
日期:——
area in organic and medicinal chemistry. Here, we present a low-cost procedure for the tunable and selective conversion of biomass-produced furfural to cyclopentenone derivatives using a mixture of choline chloride and urea as a biorenewable deep eutectic solvent (DES). The proposed medium is a nontoxic, biodegradable, and could be reused up to four times without any unfavorable effect on the reaction
A designed and potentially decadentate ligand for use in lanthanide(<scp>iii</scp>) catalysed biomass transformations: targeting diastereoselective <i>trans</i>-4,5-diaminocyclopentenone derivatives
作者:Krisana Peewasan、Marcel P. Merkel、Olaf Fuhr、Annie K. Powell
DOI:10.1039/d0dt00183j
日期:——
The catalysis of furfural to diastereoselective trans-4,5-diaminocyclopentenone building blocks for natural product synthesis for a wide range of amines was achieved under mild aerobic conditions.
in higher yields. A new and efficient protocol for the preparation of 4,5-diaminocyclopent-2-enones via the reaction of N-sulfonylimine with secondary amines, with p-toluenesulfonamide acting as a leaving group, is presented. In addition, p-toluenesulfonamide worked well as a catalyst even with a catalytic amount for the reaction of 2-furaldehyde and secondary amines to afford the corresponding products
Water excellent solvent for the synthesis of bifunctionalized cyclopentenones from furfural
作者:M. Nardi、P. Costanzo、A. De Nino、M. L. Di Gioia、F. Olivito、G. Sindona、A. Procopio
DOI:10.1039/c7gc02303k
日期:——
Chiral cyclopentenones are important precursors in the asymmetricsynthesis of target molecules. In particular, C-2 amino cyclopentenones could be utilised as intermediates towards antitumor natural products. On the basis of our previous experiences, we report an environmental friendly protocol for the synthesis in water of bifunctionalised cyclopentenones from furfural. The use of water and MW gives
Acidic ionic liquid 1-methylimidazolium tetrafluoroborate [HMim]+[BF4]−, was successfully employed as a reusable catalyst for the reaction of furfural and secondary amines to yield 4,5-diaminocyclopent-2-enones exclusively as trans diastereomer in the absence of solvent. The inherent Brønsted acidity and high polarity of ionic liquid resulted in the significant enhancement in the reaction rate.