Cooperative photoredox and N-heterocyclic carbene-catalyzed formal C-H acylation of cyclopropanes a deconstruction-reconstruction strategy.

Cyclopropanes are ubiquitous and key structural motifs in commercially available drugs and bioactive molecules. Herein, we present regio-selective acylation of aryl cyclopropanes with cooperative photoredox and N-heterocyclic carbene catalysis. This approach involves a deconstruction-reconstruction strategy γ-chloro-ketones as intermediates and fulfills the formal C(sp)-H functionalization of cyclopropanes.

Mechanism of two styryl BODIPYs as fluorescent probes and protective agents in lipid bilayers against aqueous ClO.

Two styryl BODIPY derivatives, BOH and BOE, with different hydrophilic properties, were investigated for their reaction mechanisms in lipid bilayers against aqueous ClO, by both experimental and theoretical methods. Density functional theory (DFT) calculations confirmed their identical conformations in solution. Fluorescence spectra and high-resolution mass spectra corroborated the central vinyl group as a common antioxidation moiety against ClO oxidation.

Modulating Ni-S coordination in NiS to promote electrocatalytic oxidation of 5-hydroxymethylfurfural at ampere-level current density.

Electricity-driven oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is a highly attractive strategy for biomass transformation. However, achieving industrial-grade current densities remains a great challenge. Herein, by modulating the water content in a solvothermal system, NiS/NF with stabilized and shorter Ni-S bonds as well as a tunable coordination environment of Ni sites was fabricated.

[Prospective,multi-center,and large-scale hospital centralized monitoring of clinical safety of Reduning Injection in 100249 children cases].

This study utilized a prospective, large-sample, multi-center, and registered key specialty approach of hospitals to monitor the application of Reduning Injection. A total of 100 249 adolescent patients aged 14 years and below who received Reduning Injection were monitored, resulting in 83 cases of adverse events, with 76 of them being classified as adverse drug reaction(ADR). The calculated incidence rate of ADR for Reduning Injection was 0.

Unravelling the doping effect of potassium ions on structural modulation and photocatalytic activity of graphitic carbon nitride.

Graphitic carbon nitride (GCN), as a promising photocatalyst, has been intensely investigated in the photocatalytic fields, but its performance is still unsatisfactory. To date, metal ion doping has been proven to be an effective modification method to improve the photocatalytic activity of GCN. More importantly, comprehensive understanding of the doping mechanism will be of benefit to synthesize efficient GCN based photocatalysts.

Enhanced biocrude production from hydrothermal conversion of municipal sewage sludge co-liquefaction with various model feedstocks.

Hydrothermal co-liquefaction has the potential to improve biocrude yield. To investigate the influence of various types of biomass on co-liquefaction with municipal sewage sludge (MSS), experiments on MSS with three kinds of model feedstocks (soy oil, soy protein, and starch) were carried out. Reaction temperatures of 300, 320, and 340 °C proved to be the appropriate reaction temperatures for the highest biocrude yield for soy oil, soy protein, and starch, respectively.

[Research of preparation quality markers of Yulian Tang with anti-inflammatory activity].

The lipopolysaccharide(LPS)-indused RAW264.7 cells inflammation model was used as a carrier to investigated the effects of the preparation quality markers of Yulian Tang with anti-inflammatory activity in vitro. RAW264.

Electron transport layer assisted by nickel chloride hexahydrate for open-circuit voltage improvement in MAPbI perovskite solar cells.

SnO is a promising electron transport layer (ETL) material with important applications in planar perovskite solar cells (PSCs). However, electron-hole recombination and charge extraction between SnO and the perovskite layer necessitates further exploration. Nickel chloride hexahydrate (NiCl·6HO) was introduced into the SnO ETL, which significantly increased the power conversion efficiency (PCE) from 15.

A comparison study of sodium ion- and potassium ion-modified graphitic carbon nitride for photocatalytic hydrogen evolution.

It is well known that modifying graphitic carbon nitride (GCN) is an imperative strategy to improve its photocatalytic activity. In this study, Na-doped and K-doped graphitic carbon nitride (GCN-Na and GCN-K) were prepared the simple thermal polymerization of a mixture of melamine and NaCl or KCl, respectively. The structure characterization showed that both Na and K intercalation could reduce the interlayer distance of GCN and introduce cyano defects in GCN, while K apparently had a stronger influence on the structure variation of GCN.

Mechanistic insights into dioxygen activation by a manganese corrole complex: a broken-symmetry DFT study.

The Mn-oxygen species have been implicated as key intermediates in various Mn-mediated oxidation reactions. However, artificial oxidants were often used for the synthesis of the Mn-oxygen intermediates. Remarkably, the Mn(v)-oxo and Mn(iv)-peroxo species have been observed in the activation of O by Mn(iii) corroles in the presence of base (OH) and hydrogen donors.

Electrostatic interaction mechanism of visible light absorption broadening in ion-doped graphitic carbon nitride.

Broadening the light response of graphitic carbon nitride (CN) is helpful to improve its solar energy utilization efficiency in photocatalytic reaction. In this work, a facile synthesis method was developed the treatment of potassium-doped CN (CN-K) with HO in isopropanol solvent. Various characterizations indicate the basic structure of CN-K treated with HO (CN-K-OOH) resembles that of CN-K, while it presents light absorption up to 650 nm.

A DNA small molecular probe with increasing K concentration promoted selectivity.

DNA small molecular probe study was considered as a promising approach to achieve DNA related disease diagnosis. Most related reports were performed under specific salinity. Herein, 4-imino-3-(pyridin-2-yl)-4-quinolizine-1-carbonitrile (IPQC) was generated a facile procedure with high yield (85%).

Promotion effects of flavonoids on browning induced by enzymatic oxidation of tyrosinase: structure-activity relationship.

Tyrosinase, widely distributed in nature, is a copper-containing polyphenol oxidase involved in the formation of melanin. Flavonoids are most often considered as tyrosinase inhibitors but have also been confirmed to be tyrosinase substrates. Four structure-related flavonoids including flavones (apigenin and luteolin) and flavonols (kaempferol and quercetin) are found to promote not inhibit browning induced by tyrosinase catalyzed oxidation both in model systems and in mushrooms under aerobic conditions.

Prominent roles of Ni(OH) deposited on ZnInS microspheres in efficient charge separation and photocatalytic H evolution.

In this work, Ni(OH)-deposited ZnInS microspheres (Ni(OH)/ZnInS) were fabricated using a hydrothermal process, followed by a facile precipitation method. It was demonstrated that the deposition of Ni(OH) on ZnInS effectively promotes the separation of charges photogenerated over ZnInS, and significantly enhances photocatalytic H evolution. The optimum rate of the photocatalytic H evolution over the 6% Ni(OH)/ZnInS composite reaches 4.

Ligand-controlled regioselective and chemodivergent defluorinative functionalization of -difluorocyclopropanes with simple ketones.

Modulating the reaction selectivity is highly attractive and pivotal to the rational design of synthetic regimes. The defluorinative functionalization of -difluorocyclopropanes constitutes a promising route to construct β-vinyl fluorine scaffolds, whereas chemo- and regioselective access to α-substitution patterns remains a formidable challenge. Presented herein is a robust Pd/NHC ligand synergistic strategy that could enable the C-F bond functionalization with exclusive α-regioselectivity with simple ketones.

Palladium-catalyzed benzylic C(sp)-H carbonylative arylation of azaarylmethyl amines with aryl bromides.

A highly selective palladium-catalyzed carbonylative arylation of weakly acidic benzylic C(sp)-H bonds of azaarylmethylamines with aryl bromides under 1 atm of CO gas has been achieved. This work represents the first examples of use of such weakly acidic pronucleophiles in this class of transformations. In the presence of a NIXANTPHOS-based palladium catalyst, this one-pot cascade process allows a range of azaarylmethylamines containing pyridyl, quinolinyl and pyrimidyl moieties and acyclic and cyclic amines to undergo efficient reactions with aryl bromides and CO to provide α-amino aryl-azaarylmethyl ketones in moderate to high yields with a broad substrate scope and good tolerance of functional groups.

Ruthenium catalyzed β-selective alkylation of vinylpyridines with aldehydes/ketones NH mediated deoxygenative couplings.

Umpolung (polarity reversal) tactics of aldehydes/ketones have greatly broadened carbonyl chemistry by enabling transformations with electrophilic reagents and deoxygenative functionalizations. Herein, we report the first ruthenium-catalyzed β-selective alkylation of vinylpyridines with both naturally abundant aromatic and aliphatic aldehyde/ketones NH mediated deoxygenative couplings. Compared with one-electron umpolung of carbonyls to alcohols, this two-electron umpolung strategy realized reductive deoxygenation targets, which were not only applicable to the regioselective alkylation of a broad range of 2/4-alkene substituted pyridines, but also amenable to challenging 3-vinyl and steric-embedded internal pyridines as well as their analogous heterocyclic structures.

Coupling molecular rigidity and flexibility on fused backbones for NIR-II photothermal conversion.

Great attention is being increasingly paid to photothermal conversion in the near-infrared (NIR)-II window (1000-1350 nm), where deeper tissue penetration is favored. To date, only a limited number of organic photothermal polymers and relevant theory have been exploited to direct the molecular design of polymers with highly efficient photothermal conversion, specifically in the NIR-II window. This work proposes a fused backbone structure locked an intramolecular hydrogen bonding interaction and double bond, which favors molecular planarity and rigidity in the ground state and molecular flexibility in the excited state.

Global Evidence of Temperature Acclimation of COVID-19 D614G Linage.

The novel D614G linage is becoming the dominating species of SARS-CoV-2. The impact of meteorological and geographical factors on SARS-CoV-2 pandemic are presently not well understood. This research article presents a retrospective case series.

COVID-19: Short-Term Influence on China's Economy Considering Different Scenarios.

Recently, most countries have entered the outbreak period of the novel coronavirus epidemic. This sudden outbreak has caused a huge impact on the global economy, which has intensified the division of globalization and the recession of the global economy. Although the epidemic situation in China has gradually stabilized, the severe situation in the world still inevitably impacts China's economy.

Crude Oil Price Fluctuation Analysis Under Considering Emergency and Network Search Data.

With the rapid development of the global economy, crude oil is becoming more and more prominent in terms of national stability. However, oil prices dramatically fluctuate during emergencies. Meanwhile, network search data have been widely used for prediction during the era of big data.

[ADR/AE early warning analysis of Shujin Jianyao Pills based on spontaneous reporting system].

To explore the general characteristics of adverse drug reactions/adverse events(ADR/AE) in patients after using Shujin Jianyao Pills, and explore risk warning signals, this study analyzed 166 cases of ADR/AE reports of Shujin Jianyao Pills collected from 2005 to 2017 based on the National Center for ADR Monitoring spontaneous reporting system(SRS). And the descriptive statistical method was used to analyze general characteristics. The results showed that among the 166 ADR/AE cases, 106 cases were female patients, accounting for 63.

[Analysis of clinical application characteristics of Xiyanping Injection in 194 873 cases in real world].

To analyze the clinincal application characteristics of Xiyanping Injection in real world. The data of the patients came from the hospital information systerm(HIS) of 29 tertiary hospitals in China from 2006 to 2016. It included three parts about basic information, Western medicine diagnosis information, and doctor advice information.

[Analysis of clinical application characteristics of Xingnaojing Injection in treating cerebral hemorrhage in real world].

To explore the population characteristics and clinical application characteristics of patients with cerebral hemorrhage treated with Xingnaojing Injection in real world. The model was established by Apriori algorithm, and the general information and medication information of 8 369 patients with cerebral hemorrhage treated with Xingnaojing Injection were analyzed by using Clementine 12.0 in the databases of information systems of 33 class Ⅲ grade A hospitals in China.

[Tabu search algorithm analysis on effect of Xingnaojing Injection in treatment of craniocerebral injury and complications in real world].

In this study, Tabu search algorithm was used to analyze the drug combination of Xingnaojing Injection in the treatment of brain injury and complications in the real world, and the clinical drug combination of Xingnaojing Injection in the treatment of brain injury and complications was selected and summarized. The combination of Xingnaojing Injection, Namefen and Citicoline were recommended in the treatment of brain injury and complications. For brain edema and nerve injury, Mannitol/Glycerol Fructose/Furosemide+Tetrahexose Monosialate Ganglioside Sodium should be recommended.