Lisa Cattelan
Ca' Foscari University of Venice
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Publication
Featured researches published by Lisa Cattelan.
Beilstein Journal of Organic Chemistry | 2016
Maurizio Selva; Alvise Perosa; Sandro Guidi; Lisa Cattelan
Summary The use of ionic liquids (ILs) as organocatalysts is reviewed for transesterification reactions, specifically for the conversion of nontoxic compounds such as dialkyl carbonates to both linear mono-transesterification products or alkylene carbonates. An introductory survey compares pros and cons of classic catalysts based on both acidic and basic systems, to ionic liquids. Then, innovative green syntheses of task-specific ILs and their representative applications are introduced to detail the efficiency and highly selective outcome of ILs-catalyzed transesterification reactions. A mechanistic hypothesis is discussed by the concept of cooperative catalysis based on the dual (electrophilic/nucleophilic) activation of reactants.
Chemsuschem | 2015
Lisa Cattelan; Marco Noè; Maurizio Selva; Nicola Demitri; Alvise Perosa
The methyltriphenylphosphonium methylcarbonate salt [Ph3 PCH3 ][CH3 OCO2 ], obtained directly by quaternarization of triphenylphosphine with dimethylcarbonate, is a latent ylide that promotes Wittig vinylation of aldehydes and ketones. Alkenes are obtained simply by mixing [Ph3 PCH3 ][CH3 OCO2 ] and the carbonyl and heating in a solvent (no base, no halides, and no inorganic byproducts). Deuterium exchange experiments and the particularly short anion-cation distance measured by XRD in [Ph3 PCH3 ][CH3 OCO2 ] allowed to explain the nature and reactivity of this species. Green chemistry metrics (atom economy, mass index, environmental factor) indicate that this vinylation procedure is more efficient than comparable ones. Deuterated [Ph3 PCD3 ][CH3 OCO2 ] promoted the synthesis of deuterated olefins.
Chemsuschem | 2017
Lisa Cattelan; Alvise Perosa; Pietro Riello; Thomas Maschmeyer; Maurizio Selva
The base-catalysed reactions of OH-bearing biobased derivatives (BBDs) including glycerol formal, solketal, glycerol carbonate, furfuryl alcohol and tetrahydrofurfuryl alcohol with non-toxic dialkyl carbonates (dimethyl and diethyl carbonate) were explored under continuous-flow (CF) conditions in the presence of three Na-exchanged Y- and X-faujasites (FAUs) and four Mg-Al hydrotalcites (HTs). Compared to previous etherification protocols mediated by dialkyl carbonates, the reported procedure offers substantial improvements not only in terms of (chemo)selectivity but also for the recyclability of the catalysts, workup, ease of product purification and, importantly, process intensification. Characterisation studies proved that both HT30 and KW2000 hydrotalcites acted as catalyst precursors: during the thermal activation pre-treatments, the typical lamellar structure of the hydrotalcite was broken down gradually into a MgO-like phase (periclase) or rather a magnesia-alumina solid solution, which was the genuine catalytic phase.
Chemcatchem | 2017
Lisa Cattelan; Alexander K. L. Yuen; Matthew Y. Lui; Anthony F. Masters; Maurizio Selva; Alvise Perosa; Thomas Maschmeyer
The catalytic depolymerization of Kraft lignin in supercritical ethanol was explored in the presence of Mo2C‐ and MoS2‐based catalysts. At 280 °C, Mo2C and Mo2C/Al2O3 afforded aromatic yields of 425 and 419 mg g−1 lignin, respectively: amongst the highest yields reported to date. Ionic–liquid–assisted delamination of MoS2 resulted in highly active catalysts, capable of quantitative conversion of lignin at the expense of aromatic yield (approximately 186 mg g−1 lignin). Across all the catalysts studied, between 0.04 wt % and 0.38 wt % of molybdenum leached into the solution under supercritical conditions, according to inductively coupled plasma (ICP) analyses (corresponding to 27–570 μg of molybdenum in the reaction supernatant). A small contribution to the molybdenum in solution comes from the reactor itself (Hastelloy C contains 16 wt % Mo). Analysis of a depolymerization performed with fresh Kraft lignin and the soluble portion of the reaction mixture from a previous reactor run indicated that the leached species were neither active enough to afford the high conversions observed, nor selective enough to give high yields of aromatic products. In conjunction with the ICP data and differential chemoselectivities of the Mo2C‐ and MoS2‐based catalysts, these results suggest that the bulk of the catalysis is heterogeneous.
Energy & Fuels | 2017
Matthew Y. Lui; Lisa Cattelan; Lisa C. Player; Anthony F. Masters; Alvise Perosa; Maurizio Selva; Thomas Maschmeyer
ACS Sustainable Chemistry & Engineering | 2018
Lisa Cattelan; Giulia Fiorani; Alvise Perosa; Thomas Maschmeyer; Maurizio Selva
Archive | 2016
Maurizio Selva; Alvise Perosa; Sandro Guidi; Lisa Cattelan
CHEM INFORM | 2016
Lisa Cattelan; Marco Noè; Maurizio Selva; Nicola Demitri; Alvise Perosa
Sigma Aldrich Young Chemists Symposium 2015 | 2015
Lisa Cattelan; Sandro Guidi; Maurizio Selva
European Winter School on Physical Organic Chemistry (E-WISPOC 2015) | 2015
Lisa Cattelan; Marco Noè; Maurizio Selva; Alvise Perosa