Tag: 218.25

Nickel-catalyzed intramolecular C-H arylation using aryl pivalates as electrophiles was written by Wang, Jiayi;Ferguson, Devin M.;Kalyani, Dipannita. And the article was included in Tetrahedron in 2013.Safety of Naphtho[2,1-b]benzofuran This article mentions the following:

This paper describes a method for nickel catalyzed intramol. C-H arylation using aryl pivalates as electrophiles. The transformation is efficient for the synthesis of diverse electronically and sterically differentiated dibenzofurans. Addnl., the method could be expanded toward the synthesis of carbazoles. Preliminary mechanistic studies of the transformation are also described. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Safety of Naphtho[2,1-b]benzofuran).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Benzofurans are stable towards alkali and readily polymerize on treatment with sulfuric acid, due to which they are useful for the preparation of low cost chemically relatively inert resins.Safety of Naphtho[2,1-b]benzofuran

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Investigation of air and soil pollution in the residential areas of the city of Grozny by persistent organic pollutants was written by Shakhtamirov, I. Ya.;Amirova, Z. K.. And the article was included in Ekologiya Urbanizirovannykh Territorii in 2011.Related Products of 205-39-0 This article mentions the following:

The results of studies of contamination by persistent organic pollutants (PAHs, PCBs, organochlorine pesticides), air and soil of the city of Grozny. Studies performed in the monitoring of POPs in Europe within the framework of MONET-CEEC regional center for POPs, Brno, Czech Republic. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Related Products of 205-39-0).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antioxidant, antitubercular, antiplasmodial, insecticidal.Related Products of 205-39-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Combustion of furniture wood waste and solid wood: Kinetic study and evolution of pollutants was written by Moreno, Ana Isabel;Font, Rafael;Conesa, Juan A.. And the article was included in Fuel in 2017.SDS of cas: 205-39-0 This article mentions the following:

This work is focused on the combustion processes of wood waste. Two kinds of waste have been studied: furniture wood waste (treated and used wood) and solid wood from factories (untreated wood). A kinetic study has been carried out for each material in air and an N₂:O₂ 9:1 atm with dynamic and dynamic + isothermal runs at different heating rates, considering the decomposition of the three main components of the wood and also the combustion of the char obtained. Satisfactory kinetic models were obtained for each kind of wood. Significant differences in thermal behavior were found between furniture wood waste and solid wood, probably due to the presence of additives and inorganic compounds in the furniture wood waste, which modifies the kinetic parameters of the thermal process. Moreover, combustion runs at 850 °C of both kinds of woods were also carried out in a laboratory scale tubular reactor in order to analyze the volatile and semivolatile compounds The main differences were found in the higher yield of nitrogenated compounds found during the combustion of the furniture wood waste. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0SDS of cas: 205-39-0).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Many natural or synthetic compounds containing benzofuran skeletons have been found to possess remarkable activity as agrochemicals and pharmaceuticals. Substituted benzofurans find applications such as fluorescent sensors, oxidants, in drug discovery, and in another field of chemistry and agriculture.SDS of cas: 205-39-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Distribution of coal and coal combustion related organic pollutants in the environment of the Upper Silesian Industrial Region was written by Nadudvari, Adam;Fabianska, Monika J.;Marynowski, Leszek;Kozielska, Barbara;Konieczynski, Jan;Smolka-Danielowska, Danuta;Cmiel, Stanislaw. And the article was included in Science of the Total Environment in 2018.Name: Naphtho[2,1-b]benzofuran This article mentions the following:

In this study, a large sample set (276) was separated into up to 15 groups, including coal, fly ash, total particulate matter, coal wastes, river sediments, and different water types. Grouping the sample set into these categories helped to identify the typical features of combustion or water-washing and compare them using newly developed polycyclic aromatic hydrocarbon diagnostic ratios. A wide range of organic pollutants were identified in samples, including aromatic and polycyclic hydrocarbons, nitrogen-heterocycles, sulfur-heterocycles + trithiolane, and polycyclic aromatic hydrocarbons substituted with oxygen functional groups. The distribution of compounds was significantly influenced by water washing or combustion. During the self-heating of coal wastes, secondary compounds such as chlorinated aromatics (chlorobenzene, chloroanthracene, etc.) or light sulfur compounds (e.g. benzenethiol and benzo[b]thiophene) were formed (synthesized). Since these compounds are generally absent in sedimentary organic matter, their origin may be connected with high-temperature formation in burning coal dumps. These compounds should be identified as persistent organic pollutants (POPs) in the environment. The newly defined diagnostic ratios have worked well in separating samples (petrogenic and pyrogenic) and have pointed out the effect of incomplete combustion on self-heated coal waste, ash from domestic furnaces, or water washing and biodegradation of the studied compounds In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Name: Naphtho[2,1-b]benzofuran).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofuran derivatives have shown many biological activities, including antifungal and antimicrobial properties, and acting as antagonists of H3 receptors and angiotensin II. Benzofurans are stable towards alkali and readily polymerize on treatment with sulfuric acid, due to which they are useful for the preparation of low cost chemically relatively inert resins.Name: Naphtho[2,1-b]benzofuran

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Geochemical and palynological study of the Upper Famennian Dasberg event horizon from the Holy Cross Mountains (central Poland) was written by Marynowski, Leszek;Filipiak, Pawel;Zaton, Michal. And the article was included in Geological Magazine in 2010.SDS of cas: 205-39-0 This article mentions the following:

Integrated palynol., organic and inorganic geochem. and petrog. methods have been used for deciphering the depositional redox conditions and character of organic matter of the Famennian Dasberg event horizon from the deep-shelf Kowala succession of the Holy Cross Mountains. The ages of the investigated samples have been established, using miospore data, as VF (Diducites versabilis-Grandispora famenensis) and LV (Retispora lepidophyta-Apiculiretusispora verrucosa) miospore Zones of the Middle/Upper Famennian. In the standard conodont zonation, this corresponds to the uppermost postera to lowermost praesulcata Zones. The presence of green sulfur bacteria biomarkers and dominance of small-sized framboids together with the presence of large framboids and low values of the U/Th ratio may indicate that during sedimentation of the lower Dasberg shale, intermittent anoxia occurred in the water column, or the anoxic conditions prevailed in the upper part of the water column, while the bottom waters were oxygenated, at least briefly. Deposition of the upper Dasberg shale was characterized by both bottom water and water column anoxia. The lack of acritarcha taxa from these intervals could have been due to anoxia in the photic zone. Moreover, organic content is high in those samples. There is no geochem. evidence for anoxia during sedimentation of the deposits sandwiched between the lower and upper Dasberg shales, or in the deposits which underlie and overlie both Dasberg shale horizons. The two discrete anoxic events are interpreted to be the result of major transgressions and the blooming of primary producers. Above the Dasberg shales, small fragments of charcoal and raised concentrations of polycyclic aromatic hydrocarbons are detected. This supports the presence of wildfires during deposition of shales just above the boundary of VF/LV palynol. zones. Temperatures calculated from the fusinite reflectance values suggest that the charcoal was formed in low-temperature ground and/or surface fires. The typical marine character of sedimentation combined with the high proportion of charcoals suggests that wildfires were large-scale, and that there was intensive transport of terrestrial material. The main causes of intensive wildfires were a significant rise of O₂ in the atm. and important progress in the land plant diversity during Late Devonian times. Palynofacies studies suggest that the transgression corresponds to the part IIf of the Late Devonian sea-level curve. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0SDS of cas: 205-39-0).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofuran derivatives have shown many biological activities, including antifungal and antimicrobial properties, and acting as antagonists of H3 receptors and angiotensin II. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antiviral, antimicrobial, antitumor, anti-inflammatory.SDS of cas: 205-39-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Distribution of oxygenated and unoxygenated aromatics from phenol pyrolysis at low temperatures was written by Yang, Yun;Mulholland, James A.. And the article was included in Organohalogen Compounds in 1997.Recommanded Product: 205-39-0 This article mentions the following:

The gas-phase pyrolysis of phenol was studied to investigate the effect of temperature on the distribution of aromatic products in waste incineration. Experiments were conducted in a flow tube reactor at 400-700° with a residence time of 20 s. Oxygenated and unoxygenated aromatic products were detected. The major oxygenated product was dibenzofuran which peaked at 650°. The major unoxygenated products were benzene, naphthalene, and indene. Yields of these and higher mol. weight polyaromatic hydrocarbons increased with temperature The conversion rate of phenol was <5% at <550°, but >95% at ≥650°. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Recommanded Product: 205-39-0).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Many natural or synthetic compounds containing benzofuran skeletons have been found to possess remarkable activity as agrochemicals and pharmaceuticals. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antiviral, antimicrobial, antitumor, anti-inflammatory.Recommanded Product: 205-39-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Composition of heterocyclic compounds of oil shale in Cambrian rocks from the east of the Siberian platform was written by Kashirtsev, V. A.;Kovalenko, E. Yu.;Min, R. S.;Sagachenko, T. A.. And the article was included in Khimiya Tverdogo Topliva (Moscow, Russian Federation) in 2009.Related Products of 205-39-0 This article mentions the following:

The mol. composition of the S-, O-, and N-containing heterocyclic aromatic compounds of bitumen separated from the rocks of the Cambrian oil shale formation was studied. Among the sulfur compounds, dibenzothiophene, its alkyl and naphthene derivatives, naphthobenzothiophenes, and their alkyl homologs were identified. Among the oxygen compounds, unbranched dibenzo- and naphthobenzofuran and their C₁-C₄ and C₁-C₂ alkyl homologs, resp., were detected. Acridinones, benzoacridinones, and their alkyl homologs were present among the nitrogen compounds In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Related Products of 205-39-0).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofuran is a core structural unit found in many naturally occurring compounds with multidirectional biological activities. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.Related Products of 205-39-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Parent, Alkylated, and Sulfur/Oxygen-Containing Polycyclic Aromatic Hydrocarbons in Mainstream Smoke from 13 Brands of Chinese Cigarettes was written by Gao, Bo;Du, Xueqing;Wang, Xinming;Tang, Jianhui;Ding, Xiang;Zhang, Yanli;Bi, Xinhui;Zhang, Gan. And the article was included in Environmental Science & Technology in 2015.Formula: C16H10O This article mentions the following:

China has the world’s largest population of smokers with serious health consequences, yet the authors know a very limited spectrum of hazardous chems. in cigarette smoke even for carcinogenic polycyclic aromatic hydrocarbons (PAHs). Here, the authors chose 13 popular cigarette brands sold in China markets, collected particulate matters in mainstream smoke using filter pads and an automatic smoking machine, and analyzed 56 PAHs, including 31 parent, 18 alkylated, and 7 sulfur/oxygen-containing PAHs (S/O PAHs). The 56 PAHs in mainstream smoke totaled from 244.2 to 10254.8 ng cig^-1; parent, alkylated, and S/O PAHs shared 16-23%, 64-74%, and 6-18%, resp. Benzo[a]pyrene (BaP) ranged 1.1-41.6 ng cig^-1, while BaP equivalent concentrations (BaP_eq) ranged 3.6-120.2 ng cig^-1, but contributions to BaP_eq by individual carcinogenic PAH species varied with cigarette brands. When these cigarette smoke source profiles were pooled together with those of other combustion ones available in the literature, the authors found that widely used diagnostic ratios of parent PAHs failed to distinguish cigarette smoke from other combustion sources, except that the ratio indeno[1,2,3-cd]pyrene/(indeno[1,2,3-cd]pyrene + benzo[g,h,i]perylene) can largely sep. cigarette smoke from vehicular emissions and that the ratio of Retene/(Retene + chrysene) can further discriminate cigarette smoke from coal combustion when alkylated PAHs are involved. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Formula: C16H10O).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofuran derivatives are one of the most important oxygen-containing heterocycles. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.Formula: C16H10O

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Improving peak capacities over 100 in less than 60 seconds: operating above normal peak capacity limits with signal processing was written by Hellinghausen, Garrett;Wahab, M. Farooq;Armstrong, Daniel W.. And the article was included in Analytical and Bioanalytical Chemistry in 2020.Formula: C16H10O This article mentions the following:

A primary focus in liquid chromatog. anal. of complex samples is high peak capacity separations Using advanced instrumentation and optimal small, high-efficiency columns, complex multicomponent mixtures can now be analyzed in relatively short times. Despite these advances, chromatog. peak overlap is still observed Recently, attention has shifted from improvements in chromatog. efficiency and selectivity to enhancing data processing after collection. Curve fitting methods can be used to trace underlying peaks, but do not directly enhance chromatog. resolution Methods based on the properties of derivatives and power transform were recently shown to enhance chromatog. peak resolution while maintaining critical peak information (peak areas and retention times). These protocols have been extensively investigated for their fundamental properties, advantages, and limitations, but they have not been evaluated with complex chromatograms. Herein, we evaluate the use of deconvolution via Fourier transform (FT), even-derivative peak sharpening, and power law with the fast separation (< 60 s) of a 101-component mixture using ultra-high-pressure liquid chromatog. High noise and peak overlap are present in this gradient separation, which is representative of fast chromatog. Chromatog. resolution enhancement is demonstrated and described. Further, accurate quantitation is maintained and shown with representative examples. Enhancements in peak capacity and peak-to-peak resolutions are discussed. Finally, the statistical theory of overlap is used for 101 peaks and predictions are made for the number of singlet, doublet, and multiplets analyte peaks. The effect of increasing peak capacity by FT even derivative sharpening and power laws leads to a decrease in the number of peak overlaps and an increase in total peak number In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Formula: C16H10O).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.Formula: C16H10O

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Environmental screening by capillary gas chromatography combined with mass spectrometry and atomic emission spectroscopy was written by Pedersen-Bjergaard, Stig;Semb, Svein Ingar;Vedde, John;Brevik, Einar Magne;Greibrokk, Tyge. And the article was included in Chemosphere in 1996.Name: Naphtho[2,1-b]benzofuran This article mentions the following:

Capillary gas chromatog. (GC) combined with mass spectrometry (MS) and at. emission spectroscopy (AED) was used for a comprehensive investigation of organic micropollutants in a marine sediment. Most compounds were found and identified by a GC-MS library search. The elemental information from GC-AED was used for confirmation purposes, for analyte characterization in cases where GC-MS identification was impossible, and for screening heteroat. components. In addition, GC-AED was effectively used for the quant. part, where the total amount of GC-amenable material, compound classes, and individual components were determined In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0Name: Naphtho[2,1-b]benzofuran).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives.Benzofuran is one of the most significant oxygen-containing heterocycles consisting of fused benzene and furan ring, which are widely presented in various naturally occurring and synthetically active compounds. In nature, benzofurans have occupied an important role among the plant phenols & several pharmacologically active compounds.Name: Naphtho[2,1-b]benzofuran

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem