Month: December 2022

Thomas-Wilson, Amelia published the artcileReplacing Synperonic N in the Physical Developer fingermark visualization process: Reformulation, COA of Formula: C14H31NO2, the publication is Forensic Science International (2021), 110786, database is CAplus and MEDLINE.

The Phys. Developer solution currently recommended for use in the United Kingdom for fingermark visualization uses two surfactants: n-dodecylamine acetate (nDDAA) and Synperonic N. Synperonic N is covered by the EU directive 82/242/EEC, which sought to phase out chems. with degradation products more harmful than their precursor. This study explores the replacement of Synperonic N with alternative detergents and examines their ability to produce clear, stable solutions that are effective at developing fingermarks. The critical properties of the detergents were investigated, such as the critical micelle concentration and the hydrophilic-lipophilic balance, and planted mark comparisons were performed on promising formulations. Tween 20 was deemed unsuitable due to the production of cloudy solutions and the requirement to age the formulation to improve effectiveness. Brij C10 produced clear formulations; however, these were too stable causing unacceptably long exhibit processing times, and an addnl. preparation stage was necessary. Brij L23, Brij S10, Igepal CO-630, Polyoxyethylene (10) tridecyl ether and Tergitol 15-S-9 also proved to be unsuccessful alternatives. Decaethylene glycol monododecyl ether (DGME) was found to be a suitable alternative to Synperonic N and depletion series experiments suggested that a range of DGME and nDDAA detergent quantities were effective at developing marks. The processing time using DGME was similar to Synperonic N and the most favorable ratio of reagents is proposed in this paper as a reformulated Phys. Developer solution

Forensic Science International published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C4Br2N2O4S, COA of Formula: C14H31NO2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Cartledge, Emily M. published the artcileReplacing Synperonic N in the physical developer fingermark visualisation process: Pseudo-operational trial and parameter studies, Category: catalysis-chemistry, the publication is Forensic Science International (2021), 110916, database is CAplus and MEDLINE.

A reformulated phys. developer (PD) solution has been devised to replace the use of Synperonic N for environmental reasons. The performance of the replacement solution has proved promising in laboratory trials using planted fingermarks [1] however; this may not always represent how a reagent works on real world samples. This paper therefore explores the effectiveness of the decaethylene glycol monododecyl ether (DGME)-based PD formulation through a pseudo-operational trial. A range of naturally handled, porous substrates were processed, which totalled over 600 samples that had been previously treated with amino acid reagents (1,2-indandione (IND) or 1,8-diazafluoren-9-one (DFO) and ninhydrin). The trial was representative of the operational use of PD at the end of a processing sequence for porous exhibits. The results from the trial establish that DGME is an effective replacement detergent for Synperonic N in PD solutions and demonstrated the added benefit of using PD as a sequential treatment. Planted mark studies to assess the parameters of the DGME-based PD formulation are also included in this paper. These studies explored the preparation, processing and storage temperature required for the solution as well as the shelf life. The effectiveness of DGME-based PD on items that have been previously wetted was also investigated. These studies show the formulation is suitable for use in an operational laboratory and is therefore an effective replacement formulation for the Synperonic N-based PD.

Forensic Science International published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wang, Jin published the artcileSodium Aminodiboranate, a New Reagent for Chemoselective Reduction of Aldehydes and Ketones to Alcohols, Recommanded Product: 3-Benzoylpropionicacid, the publication is Synlett (2021), 32(11), 1104-1108, database is CAplus.

Sodium aminodiboranate (NaNH₂(BH₃)₂, NaADBH) is a new member of the old borane family, which exhibits superior performance in chemoselective reduction Exptl. results show that NaADBH can rapidly reduce aldehydes RCHO (R = 1-octyl, pyridin-2-yl, 3-cyclohexenyl, etc.) and ketones R¹C(O)R² (R¹ = 2-phenylethenyl, Ph, 9-fluorenyl, etc.; R¹R² = -(CH₂)₅) to the corresponding alcs. R/R¹C(OH)R² in high efficiency and selectivity under mild conditions. There are little steric and electronic effects on this reduction

Synlett published new progress about 2051-95-8. 2051-95-8 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ketone, name is 3-Benzoylpropionicacid, and the molecular formula is C6H3ClFNO2, Recommanded Product: 3-Benzoylpropionicacid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Che, Zhiping published the artcileSynthesis of paeonol ester derivatives and their insecticidal, nematicidal, and anti-oomycete activities, HPLC of Formula: 118-90-1, the publication is Pest Management Science (2022), 78(8), 3442-3455, database is CAplus and MEDLINE.

Paeonol is extracted and isolated as a rich and sustainable natural bioresource from the root bark of Paeonia suffruticosa, the derivatives of which exhibit numerous biol. activities. It is well known that ester compounds play a very important role in pest control, such as organophosphorus, carbamate and pyrethroid pesticides. To discover biorational natural product-based pesticides, three series of (60) paeonol ester derivatives (7a-t, 8g,p, 9g,p, 10g-j,n-u, 11g,u, 12g,u, 13a-p, 14b,c, and 15b,c) were prepared by structural modification of paeonol, and their structures were well characterized by proton NMR (¹H-NMR), carbon-13 NMR (¹³C-NMR), high-resolution mass spectrometry (HRMS), and m.p. Furthermore, we assessed the compounds as insecticidal, nematicidal, and anti-oomycete agents against three serious agricultural pests, Mythimna separata, Heterodera glycines, and Phytophthora capsici. Among all tested compounds: (i) compound 8p showed more significant insecticidal activity than toosendanin, and the final mortality rates of 8p and toosendanin against M. separata (1 mg mL^-1) were 70.4%, and 51.9%, resp.; (ii) compound 7a exhibited more promising nematicidal activity than paeonol, and the median lethal concentration (LC₅₀) values of 7a and 1 against H. glycines were 15.47 and 50.80 mg L^-1, resp.; (iii) compounds 7n and 13m displayed more significant anti-oomycete activity compared to zoxamide against Phytophthora capsici, and the median effective concentration (EC₅₀) values of 7n, 13m, and zoxamide were 23.72, 24.51, and 26.87 mg L^-1, resp.; and the protective effect of the compounds against Phytophthora capsici in vivo further confirmed the effectiveness of the agents. This study suggested that the introduction of a nitro at the C5 or C3 position of paeonol could improve its bioactivity against M. separata, H. glycines, and Phytophthora capsici.

Pest Management Science published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C8H8O2, HPLC of Formula: 118-90-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wang, Yanliang published the artcileEffective removal of calcium and magnesium sulfates from wastewater in the rare earth industry, Formula: C12H16O3, the publication is RSC Advances (2019), 9(58), 33922-33930, database is CAplus and MEDLINE.

The wastewater discharged from the rare earth (RE) industry generally contains a high level of calcium and magnesium sulfates, which confers permanent hardness and causes difficulties in recycling this wastewater. In this study, the alkyl phenoxy acetic acid derivatives including 4-Me phenoxy acetic acid (M-POAA), 4-tert-Bu phenoxy acetic acid (B-POAA) and 4-tert-octyl phenoxy acetic acid (O-POAA), were synthesized via the Williamson reaction and characterized by NMR (NMR), IR (IR), and ultra-violet (UV) spectroscopy, as well as elemental anal. and X-ray diffraction (XRD). Synthesis of the POAAs were simple and green, and the raw materials used for their production are widely available and low-cost. The potential for removal of Ca and Mg sulfates from industrial wastewater using POAAs as the organic precipitants was assessed. The total precipitation efficiencies of Ca and Mg from wastewater with the use of POAAs increased with the following order: M-POAA < B-POAA < O-POAA. The residual concentrations of Ca and Mg using O-POAA as the precipitant were lower than 0.099 and 0.089 g L^-1, resp. The O-POAA could be regenerated five times without any significant change in its structure and precipitation performance. Thus, the use of the novel precipitants is a prospective alternative to the conventional processes for softening wastewater.

RSC Advances published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C18H35NO, Formula: C12H16O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xie, Yinjun published the artcileMetal bridging for directing and accelerating electron transfer as exemplified by harnessing the reactivity of AIBN, Category: catalysis-chemistry, the publication is Angewandte Chemie, International Edition (2015), 54(20), 5900-5904, database is CAplus and MEDLINE.

A new strategy for tuning the electron transfer between radicals and enolates has been developed. This method elicits the innate reactivity of AIBN with a copper catalyst and enables a cascade reaction with cinnamic acids. ESR studies and control experiments indicate that the redox-active copper species not only activates the radical by coordination, but also serves as a bridge to bring the radical and nucleophile within close proximity to facilitate electron transfer. By exploiting possible combinations of redox-active metals and radical entities with suitable coordinating functional groups, this strategy should contribute to the development of a broad range of radical-based reactions.

Angewandte Chemie, International Edition published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C8H5IO, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xue, Na published the artcileEfficient Synthesis of Vinyl Sulfones by Manganese-Catalyzed Decarboxylative Coupling of Cinnamic Acids with Aromatic Sulfinic Acid Sodium Salts, Formula: C9H7NO4, the publication is Synlett (2016), 27(19), 2695-2698, database is CAplus.

An efficient synthesis of vinyl sulfones is described. Reactions of cinnamic acids with aromatic sulfinic acid sodium salts in the presence of a catalytic amount of manganese(II) acetate tetrahydrate (5 mol%) in DMSO afforded the desired vinyl sulfones in good to excellent yields. Notably, the reaction does not need any base or iodide as additive. The use of DMSO as the solvent and running the reaction under air are critical in achieving good yields.

Synlett published new progress about 1772-76-5. 1772-76-5 belongs to catalysis-chemistry, auxiliary class Benzenes, name is (E)-3-(3-Nitrophenyl)acrylic acid, and the molecular formula is C7H8BBrO3, Formula: C9H7NO4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhang, Hong-Xia published the artcileSynthesis of Acyl Hydrazides via a Radical Chemistry of Azocarboxylic tert-Butyl Esters, Product Details of C8H8O2, the publication is Journal of Organic Chemistry (2022), 87(10), 6573-6587, database is CAplus and MEDLINE.

A new chem. of azo compounds, i.e., addition of free radicals generated in situ to access various acyl hydrazides, has been developed. The protocol provides a novel strategy for the synthesis of valuable acyl hydrazides. The transformation features mild reaction conditions, good tolerance of functional groups, and a broad substrate scope. In view of the importance of acyl hydrazides in functional materials and medicinal chem., this approach would find broad applications.

Journal of Organic Chemistry published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C6H13NO2, Product Details of C8H8O2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhou, Xiao published the artcileNickel-Catalyzed Reductive Acylation of Carboxylic Acids with Alkyl Halides and N-Hydroxyphthalimide Esters Enabled by Electrochemical Process, Product Details of C8H8O2, the publication is Advanced Synthesis & Catalysis (2022), 364(9), 1526-1531, database is CAplus.

A sustainable Ni-catalyzed reductive acylation reaction of carboxylic acids via an electrochem. pathway was presented, affording a ketones ArC(O)R [Ar = Ph, 4-MeC₆H₄, 4-PhC₆H₄, etc.; R = n-Bu, CH(Me)₂, CH₂Cy, etc.] as major products. The reaction proceeded at ambient temperature using unactivated alkyl halides and N-hydroxyphthalimide (NHP) esters as coupling partners, which exhibited several synthetic advantages, including mild conditions and convenience of amplification (58% yield for 6 mmol scale reaction).

Advanced Synthesis & Catalysis published new progress about 118-90-1. 118-90-1 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Natural product, name is 2-Methylbenzoic acid, and the molecular formula is C6H8O6, Product Details of C8H8O2.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Quadarella, Erica published the artcileA consistent soot nucleation model for improved prediction of strain rate sensitivity in ethylene/air counterflow flames, Category: catalysis-chemistry, the publication is Aerosol Science and Technology (2022), 56(7), 636-654, database is CAplus.

An improved consistent soot nucleation model was proposed and tested on ethylene counterflow flames at different strain rates. The main objective of the proposed model is to capture the correct strain rate sensitivity and broaden the applicability of the aerosol part of the soot model with different gas-phase kinetic mechanisms. Due to the uncertainties associated with exptl. measurements of quant. soot volume fraction (SVF), the approach’s effectiveness is mainly investigated on qual. behavior in terms of strain rate sensitivity. Starting from a dimer-based nucleation model available in literature, soot inception is described as heterogeneous collisions of polycyclic aromatic hydrocarbons (PAHs) forming an intermediate dimer. Such a model justifies the inclusion of small precursors that conciliate a satisfactory reproduction of SVF sensitivity to strain rate, while retaining the quant. accuracy of SVF prediction. The nucleation and condensation rates sensitivities are found to be regulated by the presence of the dimer to maintain the right balance with the upstream dimerization process. The heterogeneous collision model helps generalize the procedure and makes the model more adaptable to different kinetic mechanisms. Details about the inclusion of temperature-dependent sticking coefficients are also provided and found to be pivotal for a correct synergistic prediction of SVF trends and PAHs sensitivities to strain rate. The integration of important features in the soot nucleation model allows a generalized soot model free of empirical corrective factors, capturing the correct sensitivity to strain rates. Its ease of implementation and low computational cost make it suitable for turbulent flame simulations.

Aerosol Science and Technology published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia