60,041 results match your criteria excellent chemical


Colorimetric and turn-on fluorescent chemosensor with large stokes shift for sensitively probing cyanide anion in real samples and living systems.

Spectrochim Acta A Mol Biomol Spectrosc 2022 Jan 10;271:120882. Epub 2022 Jan 10.

Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address:

Cyanide anion is a ubiquitous chemical substance in the ecosystem, however, human daily life is severely threatened by its toxicity at any time. In this paper, a novel colorimetric and turn-on chemosensor 4-(4-(2,2-difluoro-6-methyl-2H-1,3,2-dioxaborinin-4-yl)buta-1,3-dien-1-yl)-N,N-dimethylaniline (NBF) for detecting cyanide anion was synthesized based on the 4-(dimethylamino)cinnamaldehyde and β-diketone difluoroboron complex. This fluorescent probe exhibited excellent spectroscopy properties such as large stokes shift, long emission wavelength, and good sensitivity. Read More

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January 2022

Effect of different introduction methods of cerium and tin on the properties of titanium-based catalysts for the selective catalytic reduction of NO by NH.

J Colloid Interface Sci 2021 Nov 17;613:320-336. Epub 2021 Nov 17.

School of the Environment, Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University, Nanjing 210093, PR China. Electronic address:

This work investigated the influence of introduction methods of cerium and tin on the physicochemical properties as well as the activity and durability of titanium-based catalysts for the selective catalytic reduction of NO by NH (NH-SCR). Precipitation and impregnation methods were adopted to synthesize a series of cerium-tin-titanium catalysts. These catalysts were characterized by XRD, Raman, N adsorption-desorption, HRTEM, EDS mapping, XPS, H-TPR, NH-TPD and in situ DRIFT. Read More

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November 2021

Effects of abiotic factors on the stability and infectivity of polyvalent coliphage.

Water Sci Technol 2022 Jan;85(1):141-151

College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China E-mail: Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, PR China.

Bacteriophage has attracted growing interest as a promising therapeutic agent for pathogenic bacteria, especially for antibiotic-resistant bacteria. However, the various abiotic conditions could impact the stability of phages and further threat host-virus interactions. Here, we investigated the stability and lytic activity of virulent polyvalent coliphage (named PE1) by double-layer plaque assay. Read More

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January 2022

Peroxydisulfate activation by LaNiO nanoparticles with different morphologies for the degradation of organic pollutants.

Water Sci Technol 2022 Jan;85(1):39-51

School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China E-mail:

A series of LaNiO perovskite nanoparticles with different morphologies, such as spheres, rods and cubes, were prepared through co-precipitation and hydrothermal methods, and used as the catalysts for peroxydisulfate (PDS) activation. The physical and chemical characterization of LaNiO perovskites was performed, including X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen isotherm absorption (BET), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS). The LaNiO with different shapes showed different activities in Acid Orange 7 (AO7) degradation. Read More

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January 2022

Viscosity-Based Flow Sensor on Paper for Quantitative and Label-Free Detection of α-Amylase and Its Inhibitor.

ACS Sens 2022 Jan 20. Epub 2022 Jan 20.

School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.

α-Amylase (AMS) in human serum is a critical biomarker for the early diagnosis of pancreatic damage. In addition, the inhibition of α-amylase has long been thought to decrease the occurrence of diabetes. Thus, it is critical to construct a facile and convenient method for the determination of AMS and its inhibitor. Read More

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January 2022

A Degradable-Renewable Ionic Skin Based on Edible Glutinous Rice Gel.

ACS Appl Mater Interfaces 2022 Jan 20. Epub 2022 Jan 20.

Department of Biochemical Engineering, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, China.

Traditional wearable devices are commonly nonrecyclable and nondegradable, resulting in energy waste and environmental pollution. Here, a household degradable and renewable ionic skin based on edible glutinous rice gel is developed for a strain, temperature and salivary enzyme activity sensor. This gel depends on intermolecular and intramolecular H-bonds among amylopectin and amylose, and this presents excellent skin-like properties, including stretchability, self-healing property, and adhesion to various substrates. Read More

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January 2022

Bismuth chromate (CrBiO): a new bismuth-based semiconductor with excellent photocatalytic activity.

Chem Commun (Camb) 2022 Jan 20. Epub 2022 Jan 20.

Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China.

A novel bismuth chromate material (CrBiO) was synthesized by a direct mixing method with higher photocatalytic activity in both organic pollutant detoxification and oxygen evolution. CrBiO with a band gap of 2.20 eV could be activated by photons with a wavelength below 561 nm. Read More

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January 2022

Tetrakaidecahedron-shaped Cu four-core supramolecule as novel high-performance electrode material for lithium-ion batteries.

Chem Commun (Camb) 2022 Jan 20. Epub 2022 Jan 20.

Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou 450007, P. R. China.

Here, a tetrakaidecahedron-shaped Cu four-core supramolecule was designed to overcome the defects of supramolecules for lithium-ion batteries. With multiple metal centers, conductive ligands and abundant hydrogen bonds, this novel electrode shows excellent rate capability (459.4 mA h g at 2000 mA g) and cyclicality (494. Read More

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January 2022

Mn non-equivalent doped fluoride phosphors with a short fluorescence decay time for backlighting.

Dalton Trans 2022 Jan 20. Epub 2022 Jan 20.

Key Laboratory of Green-chemistry Materials in University of Yunnan Province, Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University) of State Ethnic Affairs Commission, School of Chemistry & Environment, Yunnan Minzu University, Kunming, 650500, P. R. China.

The non-equivalent doping of Mn in red-emitting fluoride phosphors effectively shortens the fluorescence lifetime. Herein, we successfully synthesized RbNaInF:Mn phosphors by an ion-exchange method. The compensation mechanism of Mn local symmetry and charge balance in the phosphor were studied in detail by theoretical calculations based on density functional theory. Read More

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January 2022

Not Drug-like, but Like Drugs: Cnidaria Natural Products.

Mar Drugs 2021 Dec 30;20(1). Epub 2021 Dec 30.

School of Natural Sciences and Ryan Institute, National University of Ireland Galway, H91 TK33 Galway, Ireland.

Phylum Cnidaria has been an excellent source of natural products, with thousands of metabolites identified. Many of these have not been screened in bioassays. The aim of this study was to explore the potential of 5600 Cnidaria natural products (after excluding those known to derive from microbial symbionts), using a systematic approach based on chemical space, drug-likeness, predicted toxicity, and virtual screens. Read More

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December 2021

Characterization of Bioactivities and Biosynthesis of Angucycline/Angucyclinone Derivatives Derived from gen. nov., sp. nov.

Mar Drugs 2021 Dec 29;20(1). Epub 2021 Dec 29.

Department of Marine Chemistry, College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, China.

Strain NJES-13 is the type strain and currently the only species of the newly established actinobacteria genera in the family isolated from the gut microbiota of the Antarctic emperor penguin. This strain demonstrated excellent bioflocculation activity with bacteria-derived exopolysaccharides (EPSs). Moreover, it produced bioactive angucycline/angucyclinone derivatives (ADs) and contained one type III polyketide synthase (T3PKS), thus demonstrating great potential to produce novel bioactive compounds. Read More

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December 2021

Novel Alkaloids from Marine Actinobacteria: Discovery and Characterization.

Mar Drugs 2021 Dec 22;20(1). Epub 2021 Dec 22.

Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.

The marine environment is an excellent resource for natural products with therapeutic potential. Its microbial inhabitants, often associated with other marine organisms, are specialized in the synthesis of bioactive secondary metabolites. Similar to their terrestrial counterparts, marine Actinobacteria are a prevalent source of these natural products. Read More

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December 2021

Influences of NaCl and NaSO on the Micellization Behavior of the Mixture of Cetylpyridinium Chloride + Polyvinyl Pyrrolidone at Several Temperatures.

Gels 2022 Jan 16;8(1). Epub 2022 Jan 16.

Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh.

Herein, the conductivity measurement technique is used to determine the interactions that may occur between polyvinyl pyrrolidone (PVP) polymer and cetylpyridinium chloride (CPC) surfactant in the presence of NaCl and NaSO of fixed concentration at variable temperatures (298.15-323.15 K) with an interval of 5 K. Read More

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January 2022

Recent Advances in Zwitterionic Hydrogels: Preparation, Property, and Biomedical Application.

Gels 2022 Jan 7;8(1). Epub 2022 Jan 7.

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.

Nonspecific protein adsorption impedes the sustainability of materials in biologically related applications. Such adsorption activates the immune system by quick identification of allogeneic materials and triggers a rejection, resulting in the rapid failure of implant materials and drugs. Antifouling materials have been rapidly developed in the past 20 years, from natural polysaccharides (such as dextran) to synthetic polymers (such as polyethylene glycol, PEG). Read More

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January 2022

Degradable 2-Hydroxyethyl Methacrylate/Gelatin/Alginate Hydrogels Infused by Nanocolloidal Graphene Oxide as Promising Drug Delivery and Scaffolding Biomaterials.

Gels 2021 Dec 27;8(1). Epub 2021 Dec 27.

University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia.

The design and evaluation of novel 2-hydroxyethyl methacrylate/gelatin/alginate/graphene oxide hydrogels as innovative scaffolding biomaterials, which concurrently are the suitable drug delivery carrier, was proposed. The hydrogels were prepared by the adapted porogen leaching method; this is also the first time this method has been used to incorporate nanocolloidal graphene oxide through the hydrogel and simultaneously form porous structures. The effects of a material's composition on its chemical, morphological, mechanical, and swelling properties, as well as on cell viability and in vitro degradation, were assessed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), measurements of Young's modulus, gravimetric method and MTT test, respectively. Read More

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December 2021

Silica-Bacterial Cellulose Composite Aerogel Fibers with Excellent Mechanical Properties from Sodium Silicate Precursor.

Gels 2021 Dec 26;8(1). Epub 2021 Dec 26.

School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China.

Forming fibers for fabric insulation is difficult using aerogels, which have excellent thermal insulation performance but poor mechanical properties. A previous study proposed a novel method that could effectively improve the mechanical properties of aerogels and make them into fibers for use in fabric insulation. In this study, composite aerogel fibers (CAFs) with excellent mechanical properties and thermal insulation performance were prepared using a streamlined method. Read More

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December 2021

Design of Fe-Rich, High-Conductivity Lignin Hydrogels for Supercapacitor and Sensor Applications.

Biomacromolecules 2022 Jan 20. Epub 2022 Jan 20.

College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China.

Preparation of natural polymer-based highly conductive hydrogels with tunable mechanical properties for applications in flexible electronics is still challenging. Herein, we report a facile method to prepare lignin-based Fe-rich, high-conductivity hydrogels via the following two-step process: (1) lignin hydrogels are prepared by cross-linking sulfonated lignin with poly(ethylene glycol) diglycidyl ether (PEGDGE) and (2) Fe ions are impregnated into the lignin hydrogel by simply soaking in FeCl. Benefiting from Fe ion complexation with catechol groups and other functional groups in lignin, the resultant hydrogels exhibit unique properties, such as high conductivity (as high as 6. Read More

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January 2022

Design of a UCST Polymer with Strong Hydrogen Bonds and Reactive Moieties for Facile Polymer-Protein Hybridization.

Biomacromolecules 2022 Jan 20. Epub 2022 Jan 20.

Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Science and Peking Union Medical College, Tianjin 300192, China.

Polymer-protein hybrids have been extensively used in biomedical fields. Polymers with upper critical solution temperature (UCST) behaviors can form a hydrated coacervate phase below the cloud point (), providing themselves the opportunity to directly capture hydrophilic proteins and form hybrids in aqueous solutions. However, it is always a challenge to obtain a UCST polymer that could aggregate at a high temperature at a relatively low concentration and also efficiently bind with proteins. Read More

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January 2022

Synergistic Experimental and Theoretical Studies of Luminescent-Magnetic LnZn Clusters.

Inorg Chem 2022 Jan 20. Epub 2022 Jan 20.

School of Chemical Science, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Kolkata 700032, West Bengal, India.

The present work is part of our ongoing quest for developing functional inorganic complexes using unorthodox pyridyl-pyrazolyl-based ligands. Accordingly, we report herein the synthesis, characterization, and luminescence and magnetic properties of four 3d-4f mixed-metal complexes with a general core of LnZn (Ln = Dy, Gd, Tb, and Eu). In stark contrast to the popular wisdom of using a compartmental ligand with separate islands of and coordinating sites for selective coordination, we have vindicated our approach of using a ligand with overcrowded N-coordinating sites that show equal efficiency with both 4f and 3d metals toward multinuclear cage-cluster formation. Read More

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January 2022

How Polytetrafluoroethylene Lubricates Iron: An Atomistic View by Reactive Molecular Dynamics.

ACS Appl Mater Interfaces 2022 Jan 20. Epub 2022 Jan 20.

State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China.

The tribochemistry and transfer film formation at the metal/polymer interface plays an essential role in surface protection, wear reduction, and lubrication. Although the topic has been studied for decades, challenges persist in clarifying the nanoscale mechanism and dynamic evolution of tribochemical reactions. To investigate the tribochemistry between iron and polytetrafluoroethylene (PTFE) in ambient and cryogenic environments, we have trained and expanded a ReaxFF reactive force field to describe iron-oxygen-water-PTFE systems (C/H/O/F/Fe). Read More

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January 2022

Selective solid-phase microextraction of polycyclic aromatic hydrocarbons in water based on oriented phosphorus-containing titanium oxide nanofibers grown on titanium support prior to HPLC-UV.

J Sep Sci 2022 Jan 20. Epub 2022 Jan 20.

College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China.

A novel solid-phase microextraction coating of phosphorous-containing titanium oxide composite was developed using titanium fiber as a support and a titanium source by hydrothermal oxidation in phosphoric acid solution containing hydrogen peroxide. The morphology of the fiber coatings was controlled by the conditions of hydrothermal oxidation reaction. The oriented nanofiber coating was employed to extract several types of representative aromatic analytes. Read More

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January 2022

The controlled synthesis of nitrogen and iron co-doped [email protected] heterostructures for the oxygen evolution reaction and urea oxidation reaction.

Dalton Trans 2022 Jan 20. Epub 2022 Jan 20.

School of Science, North University of China, Taiyuan 030051, People's Republic of China.

At present, global resources are nearly exhausted and environmental pollution is becoming more and more serious, so it is urgent to develop efficient catalysts for hydrogen production. Herein, nitrogen and iron co-doped NiS and NiP heterostructures with high efficiency oxygen evolution reaction (OER) and urea oxidation reaction (UOR) performances were firstly successfully prepared on nickel foam by hydrothermal and high-temperature calcination methods. Benefiting from the hierarchical structure, the exposure of more active sites and the doping effect of N and Fe, the [email protected]/NF material showed excellent electrocatalytic activity for the OER and UOR. Read More

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January 2022

An Earth-abundant cobalt based photocatalyst: visible light induced direct (het)arene C-H arylation and CO capture.

Dalton Trans 2022 Jan 20. Epub 2022 Jan 20.

Green Chemistry Network Centre, Department of Chemistry, University of Delhi, New Delhi-110007, India.

In this work, we have reported a noble metal free heterogeneous photocatalyst to carry out direct (het)arene C-H arylation and solvent-free CO capture single-electron transfer processes at room temperature and under pressure. The catalytic system comprises a cobalt(III) complex grafted over the silica coated magnetic support for the efficient recovery of the photocatalytic moiety without hampering its light-harvesting capability. The novel Earth-abundant cobalt(III) based photocatalyst possesses various fascinating properties such as high surface area to volume ratios, large pore volume, crystalline behaviour, high metal loading, excellent stability and reusability. Read More

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January 2022

Amplifying Free Radical Generation of AIE Photosensitizer with Small Singlet-Triplet Splitting for Hypoxia-Overcoming Photodynamic Therapy.

ACS Appl Mater Interfaces 2022 Jan 20. Epub 2022 Jan 20.

Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, 000000 Hong Kong SAR, P. R. China.

Type-I photodynamic therapy (PDT) with less oxygen consumption shows great potential for overcoming the vicious hypoxia typically observed in solid tumors. However, the development of type-I PDT is hindered by insufficient radical generation and the ambiguous design strategy of type-I photosensitizers (PSs). Therefore, developing highly efficient type-I PSs and unveiling their structure-function relationship are still urgent and challenging. Read More

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January 2022

Surface Molecular Functionalization of Unusual Phase Metal Nanomaterials for Highly Efficient Electrochemical Carbon Dioxide Reduction under Industry-Relevant Current Density.

Small 2022 Jan 20:e2106766. Epub 2022 Jan 20.

Department of Chemistry, City University of Hong Kong, Hong Kong, 999077, China.

The electrochemical carbon dioxide reduction reaction (CO RR) provides a sustainable strategy to relieve global warming and achieve carbon neutrality. However, the practical application of CO RR is still limited by the poor selectivity and low current density. Here, the surface molecular functionalization of unusual phase metal nanomaterials for high-performance CO RR under industry-relevant current density is reported. Read More

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January 2022

Robust MOF-derived carbon-supported bimetallic Ni-Co catalysts for aqueous phase hydrodeoxygenation of vanillin.

Dalton Trans 2022 Jan 20. Epub 2022 Jan 20.

State Key Laboratory of Chemical Resources Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.

Currently, rapidly increasing consumption of fossil resources has propelled the upgrading of biomass as an alternative and sustainable technology to produce important chemicals and bio-oils. In this regard, the rational design of low-cost and robust supported metal-based catalysts that exhibit excellent catalytic hydrodeoxygenation (HDO) performance for the conversion of biomass is quite necessary. Herein, we developed hierarchical flower-like nitrogen-doped carbon layer-coated bimetallic Ni-Co nanoparticles, which were distributed over the carbonaceous matrix ([email protected]@C), a metal-organic framework (MOF) ZIF-67 precursor approach, assisted by the etching of Ni ions, hydrothermal treatment together with glucose, and following carbonization processes. Read More

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January 2022

Donor-acceptor based solvent-free organic liquid hybrids with exciplex emission and room temperature phosphorescence.

Chem Commun (Camb) 2022 Jan 20. Epub 2022 Jan 20.

Organic Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr Homi Bhabha Road, Pune 411008, India.

Solvent-free organic liquids are well-known for their excellent luminescence features. Hence, the recent developments in this area have marked them as potential emitters with high quantum yield and enhanced processability. The support of an available liquid matrix enables doping to deliver hybrid liquids with intriguing luminescence features. Read More

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January 2022

Flexoelectricity Driven Fano Resonance in Slotted Carbon Nanotubes for Decoupled Multifunctional Sensing.

Research (Wash D C) 2021 29;2021:9821905. Epub 2021 Dec 29.

College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China.

Multifunctionality, interference-free signal readout, and quantum effect are important considerations for flexible sensors equipped within a single unit towards further miniaturization. To address these criteria, we present the slotted carbon nanotube (CNT) junction features tunable Fano resonance driven by flexoelectricity, which could serve as an ideal multimodal sensory receptor. Based on extensive ab initio calculations, we find that the effective Fano factor can be used as a temperature-insensitive extrinsic variable for sensing the bending strain, and the Seebeck coefficient can be used as a strain-insensitive intrinsic variable for detecting temperature. Read More

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December 2021

Efficient synthesis of ethyl 2-(oxazolin-2-yl)alkanoates via ethoxycarbonylketene-induced electrophilic ring expansion of aziridines.

Authors:
Yelong Lei Jiaxi Xu

Beilstein J Org Chem 2022 5;18:70-76. Epub 2022 Jan 5.

State Key Laboratory of Chemical Resource Engineering, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.

Alkyl 2-diazo-3-oxoalkanoates generate alkoxycarbonylketenes, which undergo an electrophilic ring expansion with aziridines to afford alkyl 2-(oxazolin-2-yl)alkanoates in good to excellent yields under microwave heating. The method is a convenient and clean reaction without any activators and catalysts and can be also applied in the synthesis of 2-(oxazolin-2-yl)alkanamides and 1-(oxazolin-2-yl)alkylphosphonates. Read More

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January 2022

Bifunctional thiourea-catalyzed asymmetric [3 + 2] annulation reactions of 2-isothiocyanato-1-indanones with barbiturate-based olefins.

Beilstein J Org Chem 2022 4;18:25-36. Epub 2022 Jan 4.

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China.

Bifunctional thiourea-catalyzed asymmetric [3 + 2] annulation reactions of 2-isothiocyanato-1-indanones with barbiturate-based olefins have been developed to afford chiral dispiro[indene-pyrrolidine-pyrimidine]s. Through this strategy, the target products could be obtained in good to excellent yields with excellent stereoselectivities. In addition, the synthetic utility was verified through a gram-scale synthesis, one-pot three-component reactions and further transformation experiments of the products. Read More

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January 2022