Tag: 200-300

《Protein crystal occurrence domains in selective protein crystallisation for bio-separation》 was written by Li, Xiaoyu; Chen, Wenqian; Yang, Huaiyu; Yang, Zhongqiang; Heng, Jerry Y. Y.. Application of 6381-59-5 And the article was included in CrystEngComm in 2020. The article conveys some information:

Bio-separation is a key bottleneck in the manufacture of biopharmaceuticals. In this work, we report exptl. evidence of direct selective protein crystallization from a binary protein mixture solution Lysozyme-thaumatin mixtures with a wide protein composition range (0-100 mg mL-1, resp.) were tested under the same crystallization cocktail conditions using the hanging-drop vapor-diffusion (HDVD) crystallization method. This work demonstrates the selectivity of crystallization from a model binary protein mixture and four crystal occurrence domains were determined as the operation windows of selective crystallization of the target protein: (1) an unsaturated region with no crystal formation, (2 & 3) target regions with only a single type of protein crystals (lysozyme crystals only or thaumatin crystals only) and (4) a mixture region which have a mixture of both types of protein. This study demonstrates that protein crystallization is not only applicable to high-purity protein solutions and emphasizes the vital impacts of the presence of protein impurities in the process of target protein crystallization The study concludes that protein crystallization is a feasible approach to sep. a target protein from a complex mixture environment which can be achieved by manipulating the crystallization operation conditions such as mixture composition, precipitant concentration, and operation time. In the experimental materials used by the author, we found Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5Application of 6381-59-5)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. Application of 6381-59-5 Potassium sodium tartrate tetrahydrate has been used in the preparation of Lowry reagent for the determination of microsomal protein concentration in rat hepatic microsomes by Lowry method.

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《Palladium-Catalyzed Desulfurative Amide Formation from Thioureas and Arylboronic Acids》 was published in ChemCatChem in 2020. These research results belong to Su, Jianke; Li, Wendong; Li, Xin; Xu, Jian; Song, Qiuling. Formula: C12H17BO2 The article mentions the following:

Herein, the Pd-catalyzed desulfurative amide formation involved Suzuki-Miyaura coupling reaction, notably the Pd complex was generated in situ from thioureas and Ag salt and Pd catalyst were discovered. Silver salt was essential for the construction of this type of carbenes from available and stable thioureas R1R2NC(S)NR3R4 (R1 = Me, 4-fluorophenyl, 4-chlorophenyl, phenyl; R2 = Me; R3 = Me; R4 = Me, 4-fluorophenyl, 4-chlorophenyl, phenyl; R1R2 = -(CH2)5-, -(CH2)4-, -(CH2)2O(CH2)2-; R3R4 = -(CH2)5-, -(CH2)4-, -(CH2)2O(CH2)2-) and well participated in the catalytic cycle. A method for the synthesis of arylamides R5C(O)NR3R4 (R5 = acetyl, Ph, naphthalen-2-yl, 4-(benzenesulfonyl)morpholine, etc.) from arylboronic acids R5B(OH)2, which greatly enriched the application of thioureas chem. and expanded the application of the Suzuki-Miyaura coupling was developed. The experimental process involved the reaction of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6Formula: C12H17BO2)

4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6) can be used as a substrate in the study of Suzuki–Miyaura coupling of various aryl iodides over SiliaCat Pd(0).Formula: C12H17BO2

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In 2016,Huang, Wei; Zhu, Shou-cheng; Chu, Wei-fa; Yang, Hong-xing; Liang, Hui-hui published 《Synergistic compound and anti-corrosion research of α-amylase in textile industry》.Yinran Zhuji published the findings.SDS of cas: 6381-59-5 The information in the text is summarized as follows:

In order to improve α-amylase desizing effect and prolong the preservation time in textile industry, the desizing technol. for cotton fabric with α-amylase was investigated. The effect of optimum temperature, the optimum pH and enzyme concentration on the desizing effect were discussed. Taking the desizing rate as index, the influences of Na+, K+, Ca2+ inorganic compounds and non-ionic, amphoteric surfactants on desizing effect were studied. In addition, the α-amylase enzyme activity was measured, anti-corrosion effect of different kinds preservatives to α-amylase were investigated. The results show ed that sodium nitrate and potassium nitrate had certain activation of α-amylase; appropriate concentration of non-ionic surfactant and amphoteric surfactant could improve the enzyme desizing effect; 1% Et p-hydroxybenzoate could make the α-amylase remain 92%, 85% and 79% of enzymic activity under 30 °C of preservation for 30 days, 60 days and 90 days, resp. In the experiment, the researchers used Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5SDS of cas: 6381-59-5)

Potassium sodium (2R,3R)-2,3-dihydroxysuccinate tetrahydrate(cas: 6381-59-5) is a ferroelectric crystal with a high piezoelectric effect and electromechanical coupling coefficient. SDS of cas: 6381-59-5 It may be used as a constituent to prepare DNS (3,5- dinitrosalicylic acid) reagent and Fehling′s solution B, which are used in the determination of reducing sugar.

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《Bulky N-Heterocyclic-Carbene-Coordinated Palladium Catalysts for 1,2-Addition of Arylboron Compounds to Carbonyl Compounds》 was written by Okuda, Yuta; Nagaoka, Masahiro; Yamamoto, Tetsuya. Quality Control of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane And the article was included in ChemCatChem in 2020. The article conveys some information:

The synthesis of primary, secondary, and tertiary alcs. by the 1,2-addition of arylboronic acids or boronates to carbonyl compounds, including unactivated ketones, using novel bulky yet flexible N-heterocyclic carbene (NHC)-coordinated 2,6-di(pentan-3-yl)aniline (IPent)-based cyclometallated palladium complexes (CYPs) as catalysts is reported. The PhS-IPent-CYP-catalyzed reactions are efficient at low catalyst loadings (0.02-0.3 mol% Pd), and the exceptional catalytic activity for 1,2-addition is attributed to the steric bulk of the NHC ligand. These reactions can yield a wide range of functionalized benzylic alcs. that are difficult to synthesize by classical protocols using highly active organomagnesium or lithium reagents. In the part of experimental materials, we found many familiar compounds, such as 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6Quality Control of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane)

4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6) also known as boronate ester, is generally used in metal-catalyzed C-C bond formation reactions like Suzuki–Miyaura reaction.Quality Control of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane

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《Two novel MOFs@COFs hybrid-based photocatalytic platforms coupling with sulfate radical-involved advanced oxidation processes for enhanced degradation of bisphenol A》 was written by Lv, Shi-Wen; Liu, Jing-Min; Li, Chun-Yang; Zhao, Ning; Wang, Zhi-Hao; Wang, Shuo. Quality Control of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde And the article was included in Chemosphere in 2020. The article conveys some information:

Herein, for the first time, two novel MOFs@COFs hybrid materials (denoted as MIL-101-NH2@TpMA and UiO-66-NH2@TpMA) with nitrogen-rich building blocks were fabricated via a feasible step-by-step assembly method, and then employed as efficient photocatalytic platform coupling with sulfate radical-based advanced oxidation processes for the degradation of BPA under visible light irradiation Detailed analyses revealed that the hybridization of MOFs and COFs could greatly boost visible light absorption, while the heterojunction formed at the interface could effectively facilitate the separation and transfer of photogenerated electron-hole pairs. More importantly, the developed solar/MOFs@COFs/PS system exhibited the excellent degradation ability toward BPA, and an incredible degradation efficiency of 99% was eventually achieved. Possible mechanism for photocatalytic degradation of BPA was also proposed. Furthermore, the prepared composites with great reusability and stability possessed a broad potential for highly effective degradation of various organic contaminants. In short, this work not only demonstrated the combination of MOFs and COFs with C3N4 active unit was a feasible strategy for improving photocatalytic activities in the degradation of organic contaminants, but also provided some novel inspirations for constructing high-efficient photocatalysts with heterostructure. In the experiment, the researchers used many compounds, for example, 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Quality Control of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Regarding monomeric phloroglucinols, this group encompasses acryl phloroglucinols, phloroglucinol-terpene adducts, phloroglucinol glycosides, halogenated phloroglucinols, prenylated phloroglucinols, and cyclicroup polyketides.Quality Control of 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde

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In 2019,ACS Catalysis included an article by Zhao, Qun; Zhang, Jin; Szostak, Michal. Application In Synthesis of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane. The article was titled 《Ruthenium(0)-Catalyzed Cross-Coupling of Anilines with Organoboranes by Selective Carbon-Nitrogen Cleavage》. The information in the text is summarized as follows:

Selective activation of neutral carbon-nitrogen bonds is of great synthetic importance, because amines are among the most prevalent motifs across organic and bioactive mols. Herein, we report the Ru(0)-catalyzed selective cleavage of neutral C(aryl)-N bonds in generic aniline derivatives enabled by a combination of Ru3(CO)12 and an imino auxiliary. These mild conditions provide a direct route to high-value biaryl ketones and biaryl aldehydes after facile in situ hydrolysis. A broad range of organoboranes and anilines can be coupled with high C-N cleavage selectivity. Most crucially, the reaction achieves exquisite selectivity for activation of C(aryl)-N bonds in the presence of typically more kinetically favorable C(aryl)-H bonds. The method provides a strategy for the construction of functionalized terphenyls by exploiting orthogonal properties of the Ru(0) catalyst system and traceless nucleophilic properties of anilines. In the experiment, the researchers used many compounds, for example, 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6Application In Synthesis of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane)

4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane(cas: 24388-23-6) can be used as a substrate in the study of Suzuki–Miyaura coupling of various aryl iodides over SiliaCat Pd(0).Application In Synthesis of 4,4,5,5-Tetramethyl-2-phenyl-1,3,2-dioxaborolane

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The author of 《Chiral discrimination of secondary alcohols by both 1H-NMR and HPLC after labeling with a chiral derivatization reagent, 2-(2,3-anthracenedicarboximide)cyclohexane carboxylic acid》 were Ohtaki, Takashi; Akasaka, Kazuaki; Kabuto, Chizuko; Ohrui, Hiroshi. And the article was published in Chirality in 2005. Recommanded Product: 591-70-8 The author mentioned the following in the article:

Enantiomeric discrimination of chiral secondary alcs. was performed by both reversed-phase HPLC and 1H-NMR after labeling with a chiral fluorescent derivatization reagent, 2-(2,3-anthracenedicarboximide)cyclohexanecarboxylic acid. It was possible to discriminate by HPLC the chirality of alcs. up to C30 having a chiral hydroxyl group at the middle of the straight alkyl chain, and by 1H-NMR, alcs. up to C16. For alcs. having one straight alkyl and one isoalkyl group with the same carbon numbers at both sides of a hydroxyl group, it was possible to discriminate the chiralities of alcs. up to C19 by both 1H-NMR and HPLC. The 1H-NMR methods also made it possible to determine absolute configurations empirically. In the experimental materials used by the author, we found Octadecan-9-ol(cas: 591-70-8Recommanded Product: 591-70-8)

Octadecan-9-ol(cas: 591-70-8) belongs to hydroxy-containing compounds. Hydroxy groups participate in the dehydration reactions that link simple biological molecules into long chains.Recommanded Product: 591-70-8 The joining of a fatty acid to glycerol to form a triacylglycerol removes the −OH from the carboxy end of the fatty acid.

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In 2018,RSC Advances included an article by Li, Yuting; Zhu, Yan; Tu, Guangliang; Zhang, Jingyu; Zhao, Yingsheng. Formula: C13H11ClO. The article was titled 《Silver-catalyzed direct benzylation of acetanilide: a highly efficient approach to unsymmetrical triarylmethanes》. The information in the text is summarized as follows:

A highly efficient silver-catalyzed dibenzylation of acetanilides by employing the benzhydrol derivatives as the coupling partners to yield triphenylmethane derivatives was developed. Various functional groups were tolerated, leading to the corresponding products in moderate to good yields. Preliminary exptl. results indicated that the silver ions activate the arene rings and the strong acid TfOH provides the carbocations. The experimental part of the paper was very detailed, including the reaction process of (3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3Formula: C13H11ClO)

(3-Chlorophenyl)(phenyl)methanol(cas: 63012-03-3) belongs to hydroxy-containing compounds. Hydroxy groups participate in the dehydration reactions that link simple biological molecules into long chains.Formula: C13H11ClO The joining of a fatty acid to glycerol to form a triacylglycerol removes the −OH from the carboxy end of the fatty acid.

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Alcohol – Wikipedia,
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《Preparation of triazine containing porous organic polymer for high performance supercapacitor applications》 was written by Xu, Lirong; Liu, Ruiying; Wang, Fang; Yan, Shina; Shi, Xinxin; Yang, Jiaqin. Application of 34374-88-4This research focused ontriazine porous organic polymer supercapacitor. The article conveys some information:

By condensing M and TFP under solvothermal conditions, a new porous organic polymer POPM-TFP was obtained. The electrode modified with triazine containing POPM-TFP exhibits well-defined rapid redox processes and showed a high specific capacitance of 130.5 F g-1 at 2 A g-1, suggesting well electrochem. performance. After reading the article, we found that the author used 2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4Application of 34374-88-4)

2,4,6-Trihydroxybenzene-1,3,5-tricarbaldehyde(cas: 34374-88-4) is a member of phloroglucinol derivatives. Phloroglucinol derivatives are a major class of secondary metabolites. Phloroglucinol compounds can be classified into monomeric, dimeric, trimeric and higher phloroglucinols, and phlorotannins.Application of 34374-88-4

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Alcohol – Wikipedia,
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《Nickel-catalyzed allylic defluorinative alkylation of trifluoromethyl alkenes with reductive decarboxylation of redox-active esters》 was published in Chemical Science in 2019. These research results belong to Lu, Xi; Wang, Xiao-Xu; Gong, Tian-Jun; Pi, Jing-Jing; He, Shi-Jiang; Fu, Yao. Reference of ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol The article mentions the following:

An efficient method was developed for the synthesis of functionalized gem-difluoroalkenes I [R = c-hexyl, 4-BrC6H4(CH2)2, 4-CNC6H4O(CH2)2C(Me)2, etc.; Ar = 3,4-(OMe)2C6H3, 4-PhC6H4, 2-naphthyl, etc.] via nickel-catalyzed defluorinative reductive cross-coupling of trifluoromethyl alkenes with redox-active esters. The present reaction involved C(sp3)-F bond cleavage and C(sp3)-C(sp3) bond formation under very mild reaction conditions, while tolerating many sensitive functional groups and requiring minimal substrate protection. Therefore, this method provided an efficient and convenient approach for late-stage modification of biol. interesting mols.((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol(cas: 20880-92-6Reference of ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol) was used in this study.

((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol(cas: 20880-92-6) is a useful reactant for examining the effectiveness of sulfamate and sulfamide groups for the inhibition of carbonic anhydrase-​II (CA-​II)​.Reference of ((3aS,5aR,8aR,8bS)-2,2,7,7-Tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4′,5′-d]pyran-3a-yl)methanol And it is used as chiral auxiliaries in Michael and Aldol addition reactions.

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