Tetrahedron Green Chem最新文献_第5页

Recoverable and reusable heterogeneous yttrium triflate for michael and diels-alder additions 可回收和可重复使用的异质三氧化钇，用于迈克尔和迪尔斯-阿尔德添加法

Tetrahedron Green Chem Pub Date : 2023-12-01 DOI: 10.1016/j.tgchem.2023.100032

Emanuela Donato, Fabrizio Medici, Valerio Chiroli, Sergio Rossi, Alessandra Puglisi

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Visible light-promoted metal-free aerobic photooxidation of xanthenes, thioxanthenes and dihydroacridines in deep eutectic solvents 可见光促进深共晶溶剂中杂蒽、硫杂蒽和二氢吖啶的无金属有氧光氧化

Tetrahedron Green Chem Pub Date : 2023-11-14 DOI: 10.1016/j.tgchem.2023.100030

Sarah-Jayne Burlingham, Alejandro Torregrosa-Chinillach, Diego A. Alonso, Rafael Chinchilla

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Role of organic solvent and influence of oxidant in the oxidation of linalool catalyzed by molybdenum and vanadium complexes 有机溶剂在钼钒配合物催化芳樟醇氧化中的作用及氧化剂的影响

Tetrahedron Green Chem Pub Date : 2023-10-01 DOI: 10.1016/j.tgchem.2023.100029

Ali Al Hadi Haidar , Dominique Agustin

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Photoredox/HAT dual-catalyzed carboxylation of benzyl chlorides with CO2 using thiophenolate and formate as reductants 以噻吩酸酯和甲酸盐为还原剂，光氧化还原/HAT双催化氯化苄与CO2的羧化反应

Tetrahedron Green Chem Pub Date : 2023-09-07 DOI: 10.1016/j.tgchem.2023.100028

Zhengning Fan , Yaping Yi , Chanjuan Xi

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A short review: Chemo-catalytic CO2 insertion in amine and amino alcohols to produce linear and cyclic carbamates 化学催化CO2插入胺和氨基醇制备线性和环状氨基甲酸酯的研究进展

Tetrahedron Green Chem Pub Date : 2023-09-04 DOI: 10.1016/j.tgchem.2023.100024

Sharda Kondawar , Chetana Patil , Sadhana Raylu , Chandrashekhar Rode

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Continuous flow enantioselective processes catalysed by cinchona alkaloid derivatives 金鸡纳生物碱衍生物催化的连续流动对映选择性反应

Tetrahedron Green Chem Pub Date : 2023-08-28 DOI: 10.1016/j.tgchem.2023.100025

Elisabete P. Carreiro , Anthony J. Burke , Gesine J. Hermann , Hans-Jürgen Federsel

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Tandem CuI – Zinc dust as a sustainable catalyst for the preparation of propargylamine derivatives via an A3 coupling reaction, under neat conditions 串联CuI -锌粉作为可持续催化剂，在整洁条件下通过A3偶联反应制备丙胺衍生物

Tetrahedron Green Chem Pub Date : 2023-08-19 DOI: 10.1016/j.tgchem.2023.100027

Mercy E. Agbo, Hannah N. Heinz, Jasmine B. Mather, Jean Fotie

{"title":"Tandem CuI – Zinc dust as a sustainable catalyst for the preparation of propargylamine derivatives via an A3 coupling reaction, under neat conditions","authors":"Mercy E. Agbo, Hannah N. Heinz, Jasmine B. Mather, Jean Fotie","doi":"10.1016/j.tgchem.2023.100027","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100027","url":null,"abstract":"<div><p>The cooperative activity of two proximal metal ions is well-known to exhibit highly efficient and synergistic catalytic activities in living organisms. Owing to this knowledge, tandem Cu–Zn systems have been widely used to catalyze a diversity of chemical transformations. This report describes the use of CuI and zinc dust as a sustainable tandem catalyst for the preparation of propargylamines via a three-component coupling reaction under neat conditions. This reaction proceeds at low temperature, and produces good yields with a number of aliphatic and aromatic aldehydes. The reactivity of a number of amines and alkynes has also been explored under these reaction conditions, resulting in 33 fully characterized compounds prepared in the process. Among the ketones tested during this study, only cyclohexanone was able to produce the expected product in a decent yield. The catalytic system reported here represents one of the sustainable approaches to the preparation of propargylamines, as it involves the use of naturally abundant metals as a tandem catalyst, at a low temperature and under neat conditions.</p></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"2 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2023-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49707716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A green deprotection strategy: Removing acid-labile protecting groups using lemon juice/ethanol as the solvent 绿色去保护策略:用柠檬汁/乙醇作为溶剂去除酸不稳定的保护基团

Tetrahedron Green Chem Pub Date : 2023-08-18 DOI: 10.1016/j.tgchem.2023.100026

Weiding Wang, Yinzhe Chen, Xiaoheng Li, Qian Zhang

引用次数: 0

Heterogeneous flow chemistry through bamboo-based microfluidic reactors 竹材基微流控反应器的非均相流动化学研究

Tetrahedron Green Chem Pub Date : 2023-08-12 DOI: 10.1016/j.tgchem.2023.100022

Omar Ginoble Pandoli

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Development and characterization of a continuous ultrasound emulsification and nano-emulsion polymerization process 连续超声乳化与纳米乳液聚合工艺的开发与表征

Tetrahedron Green Chem Pub Date : 2023-08-12 DOI: 10.1016/j.tgchem.2023.100023

Jonas Loncke , Arne Vancleef , Wim Dermaut , Leen Braeken , Leen C.J. Thomassen

{"title":"Development and characterization of a continuous ultrasound emulsification and nano-emulsion polymerization process","authors":"Jonas Loncke , Arne Vancleef , Wim Dermaut , Leen Braeken , Leen C.J. Thomassen","doi":"10.1016/j.tgchem.2023.100023","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100023","url":null,"abstract":"<div><p>Typically, nano-emulsions are prepared in batch high-speed homogenization or ultrasound processes and polymerized afterwards in batch reactors. However, fully continuous processes have the potential to decrease production costs and energy consumption compared to batch processes. This research thus focuses on implementing ultrasound into a fully continuous emulsification and nano-emulsion polymerization process to obtain latex nano-particles from butylmethacrylate and ethylene glycol dimethacrylate. The goal of this research is to produce nano-emulsions and nano-particles with the smallest obtainable size and polydispersity in a fully continuous two-stage process. In the first stage or emulsification stage, parameters like flowrate, residence time and acoustic power are varied to influence and determine the optimal energy density. In second stage or reaction stage, residence time and reaction temperature are studied to obtain particles of monodisperse sizes. Samples produced in both stages are analysed with Dynamic Light Scattering to measure the average size and polydispersity (PdI) of the emulsion droplets and particles. Emulsification results indicate that droplet size and PdI decreases at increasing energy densities (J/ml) until 60 J/ml after which a constant droplet size of 150 nm and PdI of 0.230 are reached. Furthermore, a particle size of 50 nm and PdI of 0.080 were achieved in both batch and continuous polymerization reactors after 5 min at 85 °C. By implementing the most optimal process parameters, small emulsion droplets and particles were obtained more energy efficient in a shorter emulsification and reaction time compared to literature ultrasound assisted nano-emulsion polymerization processes.</p></div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"2 ","pages":"Article 100023"},"PeriodicalIF":0.0,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49707426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0