Synthesis and characterization of yttrium, europium, terbium and dysprosium complexes containing a novel type of triazolyl–oxazoline ligand

Scrivanti, Alberto; Bortoluzzi, Marco; Sole, Roberto; Beghetto, Valentina

doi:10.1007/s11696-017-0174-z

Cited by 17 publications

(13 citation statements)

References 69 publications

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“…Hydrogenolysis is widely employed for the depolymerization of PET in the presence of hydrogen and homogeneous Milstein-type Ru-PNN complexes which are highly reactive toward the C=O double bonds of PET to give 4-benzenedimethanol (BDM) in 99% yield at 160 • C in 48 h (Table 1, entry 1), while they are ineffective in the presence of PP and PE [147,[153][154][155]. More complex phosphine ligands have also been tested, but the economic viability on an industrial scale seems to be rather limited [147] (Table 1, entries 2-3).…”

Section: Hydrogenolysismentioning

confidence: 99%

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

et al. 2021

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Today, the scientific community is facing crucial challenges in delivering a healthier world for future generations. Among these, the quest for circular and sustainable approaches for plastic recycling is one of the most demanding for several reasons. Indeed, the massive use of plastic materials over the last century has generated large amounts of long-lasting waste, which, for much time, has not been object of adequate recovery and disposal politics. Most of this waste is generated by packaging materials. Nevertheless, in the last decade, a new trend imposed by environmental concerns brought this topic under the magnifying glass, as testified by the increasing number of related publications. Several methods have been proposed for the recycling of polymeric plastic materials based on chemical or mechanical methods. A panorama of the most promising studies related to the recycling of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS) is given within this review.

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Section: Hydrogenolysismentioning

confidence: 99%

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

et al. 2021

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“…[ 1–4 ] The tremendous impact gained by CuAAC mostly relies on the wide use of 1,4‐disubstituted‐1,2,3‐triazoles for a plethora of applications ranging from the synthesis of pharma, [ 5–10 ] polymers, [ 11–14 ] and natural compounds, [ 9 ] to the preparation of ligands for organometallic chemistry and catalyst design. [ 15–20 ] Despite the massive number of reports present in the literature, the development of new catalytic systems still represents an attracting topic, especially in view of the implementation of the sustainability of processes to be employed also at industrial level. [ 4–21 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 15–20 ] Despite the massive number of reports present in the literature, the development of new catalytic systems still represents an attracting topic, especially in view of the implementation of the sustainability of processes to be employed also at industrial level. [ 4–21 ]…”

Section: Introductionmentioning

confidence: 99%

Tris‐isocyanide copper(I) complex enabling copper azide‐alkyne cycloaddition in neat conditions

Sole

Bortoluzzi

Beghetto

et al. 2021

Applied Organom Chemis

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The three‐coordinated homoleptic Cu(I) complex with 2,6‐dimethylphenyl isocyanide in the coordination sphere was easily synthesized and isolated as tetrafluoroborate salt. The structure of the compound was determined by single‐crystal X‐ray diffraction. The complex is highly stable, active and selective toward the copper‐catalyzed azide‐alkyne cycloaddition, working in neat conditions and in the absence of bases at room temperature. Substrate scope was assessed by testing several different alkynes and azides. In most cases the corresponding 1,4‐disubstituted‐1,2,3‐triazoles were isolated in high yields.

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“…In this prospective, quaternary ammonium salts of 2-halo-4,6-dialkoxy-1,3,5-triazines, e.g., 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMTMM(Cl)), (see Figure 2 ), represent a valid alternative for the formation of amide bonds both in organic and water solvent [ 20 , 21 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. In the last years, DMTMM(Cl), commonly known as DMTMM, has found many applications as dehydro-condensation agent for the synthesis of amides and esters [ 36 , 40 ], collagen cross-linking [ 7 , 21 , 38 ], preparation of carboxymethylcellulose based films [ 39 ], amine grafting on hyaluronan [ 20 , 40 , 41 ], and peptide synthesis [ 42 ]. Additionally, the synthesis of a library of 2-(4,6-dimethoxy-1,3,5-triazinyl)trialkyl ammonium salts (DMT-Ams(X), X: Cl − or ClO 4 − ) and their activity as dehydro-condensation agents for the synthesis of amides, has been reported by Kunishima et al [ 43 ] ( Figure 2 ).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Triazine-Based Dehydro-Condensation Agents for Amide Synthesis

et al. 2021

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Conventional methods employed today for the synthesis of amides often lack of economic and environmental sustainability. Triazine-derived quaternary ammonium salts, e.g., 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMTMM(Cl)), emerged as promising dehydro-condensation agents for amide synthesis, although suffering of limited stability and high costs. In the present work, a simple protocol for the synthesis of amides mediated by 2-chloro-4,6-dimethoxy-1,3,5-triazine (CDMT) and a tert-amine has been described and data are compared to DMTMM(Cl) and other CDMT-derived quaternary ammonium salts (DMT-Ams(X), X: Cl− or ClO4−). Different tert-amines (Ams) were tested for the synthesis of various DMT-Ams(Cl), but only DMTMM(Cl) could be isolated and employed for dehydro-condensation reactions, while all CDMT/tert-amine systems tested were efficient as dehydro-condensation agents. Interestingly, in best reaction conditions, CDMT and 1,4-dimethylpiperazine gave N-phenethyl benzamide in 93% yield in 15 min, with up to half the amount of tert-amine consumption. The efficiency of CDMT/tert-amine was further compared to more stable triazine quaternary ammonium salts having a perchlorate counter anion (DMT-Ams(ClO4)). Overall CDMT/tert-amine systems appear to be a viable and more economical alternative to most dehydro-condensation agents employed today.

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Synthesis and characterization of yttrium, europium, terbium and dysprosium complexes containing a novel type of triazolyl–oxazoline ligand

Cited by 17 publications

References 69 publications

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Recent Advancements in Plastic Packaging Recycling: A Mini-Review

Tris‐isocyanide copper(I) complex enabling copper azide‐alkyne cycloaddition in neat conditions

Sustainable Triazine-Based Dehydro-Condensation Agents for Amide Synthesis

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