Copper(II) Triflate As a Reusable Catalyst for the Synthesis of <i>trans</i>-4,5-Diamino-cyclopent-2-enones in Water
作者:Rafael F. A. Gomes、Nuno R. Esteves、Jaime A. S. Coelho、Carlos A. M. Afonso
DOI:10.1021/acs.joc.7b02931
日期:2018.7.20
intermediate followed by an electrocyclization reaction to afford the desired CP. Herein, we described the use of Cu(OTf)2 as a very efficient catalyst for the synthesis of CP in water at room temperature. Furthermore, the mild reaction conditions, catalystreusability, and outstanding functional group tolerance suggest that this CP platform can be further used in chemical biology.
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
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
Heterogeneous MOF catalysts for the synthesis of trans-4,5-diaminocyclopent-2-enones from furfural and secondary amines
作者:Qiang Deng、Rong Wang
DOI:10.1016/j.catcom.2018.11.009
日期:2019.2
Cyclization of the furfural and secondary amines to generate trans-4,5-diaminocyclopentanes is a significant reaction in pharmaceutical industry. Herein, MIL-series MOF are synthesized to catalyze the cyclization with a higher activity over 99.9% and selectivity above 98.2% than homogeneous metal chloride (82.4%, 84.3%) because of its large surface area and suitable shape selectivity. The adjustable
Synthesis of trans-4,5-diaminocyclopent-2-enones from furfural catalyzed by Er(III) immobilized on silica
作者:Mónica S. Estevão、Carlos A.M. Afonso
DOI:10.1016/j.tetlet.2016.12.002
日期:2017.1
An efficient and simple method is described for the synthesis of trans-4,5-diaminocyclopent-2-enones via reaction of furfural and secondary amines, using ErCl3 center dot 6H(2)O immobilized on silica allowing an efficient catalyst reuse using n-butanol/n-hexane as the reaction media. (C) 2016 Elsevier Ltd. All rights reserved.