Tetrahedron Green Chem最新文献_第6页

Marine waste derived chitin biopolymer for N-containing supports, catalysts and chemicals 海洋废弃物衍生的甲壳素生物聚合物，用于含氮载体、催化剂和化学品

Tetrahedron Green Chem Pub Date : 2023-06-13 DOI: 10.1016/j.tgchem.2023.100013

Nishita Lucas, Chandrashekhar V. Rode

{"title":"Marine waste derived chitin biopolymer for N-containing supports, catalysts and chemicals","authors":"Nishita Lucas, Chandrashekhar V. Rode","doi":"10.1016/j.tgchem.2023.100013","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100013","url":null,"abstract":"<div>Efficacious waste valorisation is a promising strategy towards sustainability. Marine waste which was undervalued and underutilized for a long time has attracted attention recently to realize its economic value to meet the sustainable development requirements. Chitin, a naturally occurring nitrogen-rich marine biopolymer has tremendous potential for material synthesis and chemical production. The current review is focussed on highlighting the effectiveness of chitin from a catalytic perspective. Unlike chitosan, the usage of chitin for constructing catalyst has not been demonstrated thoroughly. Thus, the present study exhibits strategical chemical modification of chitin, its conversion to N-doped carbon materials as efficient catalyst for various transformation. Advancements on deriving organo-nitrogen chemicals catalytically from chitin has also been discussed. Through these two aspects the potency of chitin as a sustainable candidate for catalysis is projected. Finally, challenges and prospects are accessed to enhance the production of valuable chemicals/materials from chitin biomass via greener protocols.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"2 ","pages":"Article 100013"},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730808","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

Piperazine-Amberlyst®15-catalysed synthesis of 2-amino-4H-chromenes, chromeno[2,3-b]pyridines and chromeno[2,3-d]pyrimidines 哌嗪Amberlyst®15催化合成2-氨基-4H-色烯、色烯并[2,3-b]吡啶和色烯并[3,3-d]嘧啶

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100011

Giovanna Bosica, Roderick Abdilla

{"title":"Piperazine-Amberlyst®15-catalysed synthesis of 2-amino-4H-chromenes, chromeno[2,3-b]pyridines and chromeno[2,3-d]pyrimidines","authors":"Giovanna Bosica, Roderick Abdilla","doi":"10.1016/j.tgchem.2023.100011","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100011","url":null,"abstract":"<div>Chromenes, biologically-active scaffolds, and their variants have been often synthesized by the combination of salicylaldehyde, malononitrile, and nucleophilic species (indoles, naphthols, nitro compounds, thiols). Whereas this combination furnishes specifically 2-amino-4H-chromenes, other related compounds such as chromeno[2,3-b]pyridines and chromeno[2,3-d]pyrimidines may be also attained using similar readily available reactants: salicylaldehyde, two equivalents of malononitrile and a thiol for the former and malononitrile, two salicylaldehyde equivalents and an amine for the latter. To the best of our knowledge, there are no reported studies which have attempted to synthesize these products using the same catalyst. Hence, the aim of the below study was to find a cheap and recyclable catalyst that would be able to drive the synthesis of all three products. Positively, piperazine supported on the polymeric sulfonic acid resin Amberlyst® 15 was found to be an inexpensive and easily-prepared novel catalyst that could be used to synthesize all three derivatives (33 examples, 18–82%) in fairly good yields whilst also being recyclable and reusable (for up to four or five runs).</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"1 ","pages":"Article 100011"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730807","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: 2

Welcome to Tetrahedron Green Chem 欢迎来到四面体绿色化学

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100017

引用次数: 0

Solvent-free synthesis of nanostructured TiO2 in a continuous flow spinning disc reactor for application to photocatalytic reduction of CO2 在连续流动旋转圆盘反应器中无溶剂合成纳米结构TiO2用于光催化还原CO2

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100007

Abdullahi Adamu, Fernando Russo Abegão, Kamelia Boodhoo

{"title":"Solvent-free synthesis of nanostructured TiO2 in a continuous flow spinning disc reactor for application to photocatalytic reduction of CO2","authors":"Abdullahi Adamu, Fernando Russo Abegão, Kamelia Boodhoo","doi":"10.1016/j.tgchem.2023.100007","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100007","url":null,"abstract":"<div>Nanostructured TiO2 catalysts were synthesised via the sol-gel method using solvent-free titanium (IV) n-butoxide and acidified water at pH 1 in a continuous flow spinning disc reactor (SDR). The influence of disc rotational speed, total flow rate of the reagents, and molar hydrolysis ratio (molar ratio of the acidified water to the titanium (IV) n-butoxide) on the particle size, phase distribution, band gap energy and photocatalytic activity for CO2 reduction was studied. Increasing the disc rotational speed from 400 rpm to 1400 rpm results in highly sheared, uniformly mixed thin films where small particles (up to ca. 40 nm mean diameter) with narrow particle size distribution (polydispersity index of up to 0.5) are formed even at the lower molar hydrolysis ratio of 113. Increasing the molar hydrolysis ratio from 113 to 301 favours anatase phase transformation to rutile phase, thus improving photocatalytic activity. Larger TiO2 particles from the SDR are associated with an increase in their band gap energy whilst doping with copper narrows the band gap energy from 3.00 eV down to 2.53 eV.The photocatalytic performance of the TiO2 nanoparticles was evaluated for CO2 reduction in the form of bicarbonate ions using a meso-structured photocatalytic reactor at a TiO2 loading of 0.5 g L-1 and flow rate of 4 mL min-1. A formate production rate of 500 μmol g-1 h-1 is achieved after 2 h of irradiation (λ = 254 nm) on a bare TiO2 catalyst, with no apparent trend observed with SDR operating conditions used in the production of the nanoparticles. However, for copper-doped TiO2, there is a clear correlation between the anatase to rutile ratio and formate production rate.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"1 ","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49730320","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: 2

A sustainable and chemoselective continuous flow hydrogenation of functionalized 2-azetines to azetidines 一种可持续的化学选择性连续流加氢制备氮杂环丁烷

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100003

Elena Graziano , Debora Cannillo , Mauro Spennacchio , Pantaleo Musci , Luisa Pisano , Michael Andresini , Marco Colella

引用次数: 3

Facile and efficient acylation of chitin in deep eutectic solvents 几丁质在深共晶溶剂中容易和有效的酰化

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100012

Yusuke Egi, Jun-ichi Kadokawa

{"title":"Facile and efficient acylation of chitin in deep eutectic solvents","authors":"Yusuke Egi, Jun-ichi Kadokawa","doi":"10.1016/j.tgchem.2023.100012","DOIUrl":"https://doi.org/10.1016/j.tgchem.2023.100012","url":null,"abstract":"<div>This study investigates acylation of chitin in deep eutectic solvents (DESs) as analogous solvents of ionic liquids (ILs), because we have already reported that such reaction smoothly progresses using acyl chlorides in the presence of pyridine/N,N-dimethyl-4-aminopyridine (DMAP) as base/catalyst in the IL, that dissolves chitin. In addition to a DES composed of 1-allyl-3-methylimidazolium chloride (AMIMCl) and thiourea (TUA) as hydrogen bond acceptor and donor (HBA and HBD), respectively, which we previously reported to dissolve chitin, several DESs were prepared from AMIMCl and different HBDs, that is, urea (UA), acetylthiourea (AcTUA), acetylurea (AcUA), and 1,1,3,3-tetramethylguanidine (TMG). These DESs were found to also dissolve chitin. Hexanoylation of chitin in the AMIMCl/TUA-DES under the same conditions, as those previously performed in the IL, i.e., using hexanoyl chloride in the presence of pyridine/DMAP at 100 °C for 24 h, gave the product with the low degree of substitution (DS). As this was speculated to be due to the high nucleophilicity of TUA, which had a potential to react with hexanoyl chloride, the other HBDs with lower nucleophilicity, mentioned above, were employed to be combined with AMIMCl in the DESs. When hexanoylation of chitin was carried out in the DESs composed of UA, AcTUA, AcUA, and TMG under the same conditions as above, the higher DS products were obtained. In particular, the reaction in the AMIMCl/TMG-DES efficiently occurred in the absence of pyridine/DMAP to produce the high DS product, probably owing to the high basicity and low nucleophilicity of TMG. The structure of the chitin hexanoate produced was evaluated by the IR and 1H NMR measurements. Accordingly, acylation of chitin using various acyl chlorides was performed in the AMIMCl/TMG-DES under the conditions without the use of pyridine/DMAP to give the corresponding chitin acylates with the high DSs. This study achieves the facile and efficient acylation method of chitin in the DES.</div>","PeriodicalId":101215,"journal":{"name":"Tetrahedron Green Chem","volume":"1 ","pages":"Article 100012"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49707425","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: 1

Valorization of biomass-derived furans over molecular catalysts 生物质衍生呋喃在分子催化剂上的增值

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100008

Ambikesh Dhar Dwivedi , Bhanu Priya , Ramkrishna Chinthala , Daya Shankar Pandey , Sanjay Kumar Singh

引用次数: 2

Mg–Al hydrotalcite-based catalysts for one-pot synthesis of quinoline derivatives 一锅法合成喹啉衍生物的镁铝水滑石催化剂

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100004

Ken Motokura

引用次数: 2

Neoteric chemical transformation involving gold based photocatalysis 涉及金基光催化的近代化学转化

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2023.100009

Vishal Srivastava , Surabhi Sinha , Deepak Kumar , Praveen P. Singh

引用次数: 3

Organic solvent-free synthesis of sulfonyl hydrazides in water 磺酰肼在水中的有机无溶剂合成

Tetrahedron Green Chem Pub Date : 2023-01-01 DOI: 10.1016/j.tgchem.2022.100001

Shizuki Noda, Shinji Tanimori

引用次数: 0