Month: October 2022

Dahlund, Mats; Olin, Aake published the artcile< Chemical equilibria in aqueous solutions of olsalazine, 3,3'-azo-bis(6-hydroxybenzoic acid)>, Quality Control of 6054-98-4, the main research area is olsalazine chem equilibrium; azodisalicylate chem equilibrium; acidity azodisalicylate.

The protolytic reactions of olsalazine (I) were studied by solubility and spectrophotometric measurements at 25°. The I di-Na salt is the active component in a new drug against ulcerative colitis. The carboxylic acidity constants are pKa1 = 2.07 and pKa2 = 2.85 (0.1M NaCl) and the phenolic constants are pKa3 = 11.00 and pKa4 = 11.99 (0.25M NaCl). The solubility of H4A is 3.8 . 10-8M (0.1M NaCl). Two Na salts of the acid were studied. The solubility of NaH3A is moderate and can be calculated from its solubility product defined as Ks = [Na+][H+][H2A2-] = 1.7 x 10-10 M3. At total concentrations exceeding about 1 x 10-3 M, H2A2- starts to aggregate to form a dimer and also higher polymers. Diagrams are included to show the distribution of the I species as a function of log[H+] and total concentration, as well as the stability ranges of the solid phases.

Acta Pharmaceutica Suecica published new progress about Acidity. 6054-98-4 belongs to class alcohols-buliding-blocks, and the molecular formula is C14H8N2Na2O6, Quality Control of 6054-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Regier, Jeffery; Maillet, Robert; Bolshan, Yuri published the artcile< A Direct Bronsted Acid-Catalyzed Azidation of Benzhydrols and Carbohydrates>, Name: Triphenylmethanol, the main research area is benzhydrol carbohydrate azidotrimethylsilane azidation Bronsted acid catalyst.

Benzhydryl alcs. were converted into their corresponding diarylazidomethane analogs using azidotrimethylsilane (TMSN3) in the presence of a catalytic amount of a Bronsted acid HBF4·OEt2. The azidation reactions proceeded in high yields and demonstrated excellent functional group tolerance to electron-donating and electron-withdrawing substituents. In addition, a range of unprotected functional groups including amine, amide, aldehyde and alc. were well-tolerated. Furthermore, this methodol. was successfully applied to carbohydrates for the preparation of the corresponding azide derivatives

European Journal of Organic Chemistry published new progress about Aralkyl alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 76-84-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C19H16O, Name: Triphenylmethanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wei, Zhaohan; Zhang, Xiaoqiong; Yong, Tuying; Bie, Nana; Zhan, Guiting; Li, Xin; Liang, Qingle; Li, Jianye; Yu, Jingjing; Huang, Gang; Yan, Yuchen; Zhang, Zelong; Zhang, Bixiang; Gan, Lu; Huang, Bo; Yang, Xiangliang published the artcile< Boosting anti-PD-1 therapy with metformin-loaded macrophage-derived microparticles>, Application In Synthesis of 5505-63-5, the main research area is metformin programmed cell death therapy macrophage microparticle.

The main challenges for programmed cell death 1(PD-1)/PD-1 ligand (PD-L1) checkpoint blockade lie in a lack of sufficient T cell infiltration, tumor immunosuppressive microenvironment, and the inadequate tumor accumulation and penetration of anti-PD-1/PD-L1 antibody. Resetting tumor-associated macrophages (TAMs) is a promising strategy to enhance T-cell antitumor immunity and ameliorate tumor immunosuppression. Here, mannose-modified macrophage-derived microparticles (Man-MPs) loading metformin (Met@Man-MPs) are developed to efficiently target to M2-like TAMs to repolarize into M1-like phenotype. Met@Man-MPs-reset TAMs remodel the tumor immune microenvironment by increasing the recruitment of CD8+ T cells into tumor tissues and decreasing immunosuppressive infiltration of myeloid-derived suppressor cells and regulatory T cells. More importantly, the collagen-degrading capacity of Man-MPs contributes to the infiltration of CD8+ T cells into tumor interiors and enhances tumor accumulation and penetration of anti-PD-1 antibody. These unique features of Met@Man-MPs contribute to boost anti-PD-1 antibody therapy, improving anticancer efficacy and long-term memory immunity after combination treatment. Our results support Met@Man-MPs as a potential drug to improve tumor resistance to anti-PD-1 therapy.

Nature Communications published new progress about Antitumor agents. 5505-63-5 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H14ClNO5, Application In Synthesis of 5505-63-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Brigante, Federico I.; Lucini Mas, Agustin; Erban, Alexander; Fehrle, Ines; Martinez-Seidel, Federico; Kopka, Joachim; Wunderlin, Daniel A.; Baroni, Maria V. published the artcile< Authenticity assessment of commercial bakery products with chia, flax and sesame seeds: Application of targeted and untargeted metabolomics results from seeds and lab-scale cookies>, Application In Synthesis of 87-73-0, the main research area is bakery products chia flax sesame seeds metabolomics cookies.

Usually the investigations in food authenticity focus on the discovery of new markers in laboratory-made products. However, tests in com. products are indispensable yet rarely performed. This work presents the application of the discovered markers of chia, flax and sesame seeds in two previous studies carried out by HPLC-MS/MS and GC-MS. A set of com. bakery products was analyzed by the same workflows to assess their authenticity regarding the declaration of the seeds in the ingredients list and the package. Presence or absence of the seeds was determined by evaluation of the corresponding markers in the products. All the bakery products passed the evaluation process and were declared as authentic by both anal. techniques. Markers coming from both techniques for each of the seeds were complementary since using them as groups represents a major advantage when studying food adulteration.

Food Control published new progress about Bakery products. 87-73-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H10O8, Application In Synthesis of 87-73-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Varghese, Swapna; Rahmani, Raphael; Drew, Damien R.; Beeson, James G.; Baum, Jake; Smith, Brian J.; Baell, Jonathan B. published the artcile< Structure-Activity Studies of Truncated Latrunculin Analogues with Antimalarial Activity>, Quality Control of 627-27-0, the main research area is Plasmodium growth antimalarial latrunculin QSAR; Actin inhibitors; P. falciparum; heterocycles; latrunculin analogues; malaria; natural products.

Malarial parasites employ actin dynamics for motility, and any disruption to these dynamics renders the parasites unable to effectively establish infection. Therefore, actin presents a potential target for malarial drug discovery, and naturally occurring actin inhibitors such as latrunculins are a promising starting point. However, the limited availability of the natural product and the laborious route for synthesis of latrunculins have hindered their potential development as drug candidates. In this regard, we recently described novel truncated latrunculins, with superior actin binding potency and selectivity towards P. falciparum actin than the canonical latrunculin B. In this paper, we further explore the truncated latrunculin core to summarize the SAR for inhibition of malaria motility. This study helps further understand the binding pattern of these analogs in order to develop them as drug candidates for malaria.

ChemMedChem published new progress about Antimalarials. 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Quality Control of 627-27-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Cheng; Sun, Qiaoying; Rudolph, Matthias; Rominger, Frank; Hashmi, A. Stephen K. published the artcile< Gold-Catalyzed Regiodivergent Annulations of Diazo-Alkynes Controlled by Et3N(HF)3>, Name: But-3-en-1-ol, the main research area is ethyl aryl alkyl naphthoate regioselective preparation; phenyl ethyl diazo oxopropanoate annulation catalyst gold.

Selectivity control in catalytic carbene insertions was known to be dominated by the adjustment of both the electronic and steric properties of metal complexes. Herein, a conceptually distinct strategy that enables a regioselectivity switch for the gold-catalyzed carbohydroxylation of diazo-tethered alkynes controlled by the additive Et3N(HF)3 for synthesis of Et (aryl/alkyl)-naphthoates was I [R1 = OH, Ph, 4-MeC6H4, etc.; R2 = F, OH, Ph, etc.; R3 = H, 7-F, 7-MeO, etc.] reported. Depending on the reaction conditions, either direct carbohydroxylation was observed or Michael addition/1,2-shift of the quinoid carbene intermediate in the presence of a Bronsted acid was involved. In both cases, the reaction proceeded with high regioselectivity. An intramol. cascade fluorination process for the synthesis of aryl fluorides I [R1 = Ph, 4-MeC6H4, 2-naphthyl, etc.; R2 = F; R3 = H, 7-F, 7-MeO, etc.] in high yield, which could be triggered under inert conditions and the use of Et3N(HF)3 was described.

ACS Catalysis published new progress about Alcohols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 627-27-0 belongs to class alcohols-buliding-blocks, and the molecular formula is C4H8O, Name: But-3-en-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kaithal, Akash; van Bonn, Pit; Hoelscher, Markus; Leitner, Walter published the artcile< Manganese(I)-Catalyzed β-Methylation of Alcohols using Methanol as C1 Source>, Synthetic Route of 403-41-8, the main research area is manganese catalyzed methylation biomass alc methanol solvent safety; alcohols; hydrogen borrowing; manganese catalysis; methanol; methylation.

Highly selective β-methylation of alcs. was achieved using an earth-abundant first row transition metal in the air stable mol. manganese complex [Mn(CO)2Br[HN(C2H4PiPr2)2]] (I) ([HN(C2H4PiPr2)2]=MACHO-iPr). The reaction requires only low loadings of I (0.5 mol %), methanolate as base and MeOH as methylation reagent as well as solvent. Various alcs. were β-methylated with very good selectivity (>99%) and excellent yield (up to 94%). Biomass derived aliphatic alcs. and diols were also selectively methylated on the β-position, opening a pathway to “”biohybrid”” mols. constructed entirely from non-fossil carbon. Mechanistic studies indicate that the reaction proceeds through a borrowing hydrogen pathway involving metal-ligand cooperation at the Mn-pincer complex. This transformation provides a convenient, economical, and environmentally benign pathway for the selective C-C bond formation with potential applications for the preparation of advanced biofuels, fine chems., and biol. active mols. Of note, safety advice is recommended for high-pressure experiments due to significant risk with procedures and in conjunction with the use of suitable equipment.

Angewandte Chemie, International Edition published new progress about Alcohols Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (biomass). 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, Synthetic Route of 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Li, Hai-Lou; Lian, Chen; Yang, Guo-Yu published the artcile< {Ti6}/{Ti10} Wheel Cluster Substituted Silicotungstate Aggregates>, HPLC of Formula: 699-12-7, the main research area is titanium tungstosilicate wheel preparation thioether oxidation catalyst; crystal structure titanium tungstosilicate wheel cluster.

Two novel Ti-oxo wheel cluster substituted silicotungstates (STs) [H2NMe2]9H9[Ti6O6(SiW10O37)3]·11H2O (1) and [H2NMe2]16H10[Ti10O11(SiW10O37)2(SiW9O35)2]·14H2O (2) were made by hydrothermal reactions. The polyoxoanion of 1 is a ring-shaped trimer where a Ti6O6 ({Ti6}) wheel cluster is encapsulated by three divacant [SiW10O37]10- (SiW10O37) fragments. However, 2 is built by two divacant SiW10O37 units and two rare trivacant [SiW9O35]12- (SiW9O35) fragments and further installs an unprecedented Ti10O11 ({Ti10}) double-wheel cluster. To the best of the authors’ knowledge, 2 is rare in POM chem. Studies on the catalytic oxidation properties reveal that 1 exhibits high catalytic activity toward the oxidation of various sulfides using H2O2 as an oxidant. Also, 1 can be facilely recycled and reused for at least five cycles without obvious loss of catalytic activity.

Inorganic Chemistry published new progress about Cluster compounds Role: CAT (Catalyst Use), PRP (Properties), SPN (Synthetic Preparation), USES (Uses), PREP (Preparation). 699-12-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H10OS, HPLC of Formula: 699-12-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Ze-Shu; Chen, Yang-Bo; Wang, Kun; Xu, Zhou; Ye, Long-Wu published the artcile< One-pot synthesis of 2-hydroxymethylindoles via photoredox-catalyzed ketyl-ynamide coupling/1,3-allylic alcohol transposition>, SDS of cas: 5344-90-1, the main research area is benzoyl arylethynyl alkylsulfonamide iridium photocatalyst regioselective coupling reaction; hydroxymethylindole preparation.

An efficient visible-light-mediated ketyl-ynamide coupling by employing ynamides bearing alkyl sulfonyl substituents to deliver eneindolin-3-ols was developed. Subsequent 1,3-transposition of allylic alcs. in one pot was capable of synthesizing 2-hydroxymethylindoles in generally moderate to good yields. The synthetic utility of this protocol was also demonstrated by the facile and practical synthesis of two bioactive mols. The use of readily available substrates, a simple procedure and benign reaction conditions render this method a viable alternative for the synthesis of 2-hydroxymethylindoles.

Green Chemistry published new progress about Alkynes, aryl Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 5344-90-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C7H9NO, SDS of cas: 5344-90-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhu, JianCai; Niu, Yunwei; Xiao, ZuoBing published the artcile< Characterization of the key aroma compounds in Laoshan green teas by application of odour activity value (OAV), gas chromatography-mass spectrometry-olfactometry (GC-MS-O) and comprehensive two-dimensional gas chromatography mass spectrometry (GC x GC-qMS)>, Electric Literature of 78-70-6, the main research area is nonanol decanal skatole furaneol Laoshan green tea aroma olfactometry; Characteristic aroma compound; Comprehensive two-dimensional gas chromatography mass spectrometry (GC × GC-qMS); Laoshan green tea; Odor activity value (OAV); S-curve.

To investigate the key aroma compounds in Laoshan green teas (Huangshan (S1), Changling (S2), and Fangling (S3)), gas chromatog.-mass spectrometry-olfactometry (GC-MS-O), a flame photometric detector (FPD), odor activity value (OAV), and comprehensive two-dimensional gas chromatog. mass spectrometry (GC x GC-qMS) were employed. A total of 50 aroma compounds were perceived and 24 compounds were identified as important compounds related to OAV, such as di-Me sulfide (OAV: 126-146), skatole (OAV: 27-50), furaneol (OAV: 8-27), (Z)-jasmone (OAV: 16-23), 2-methylbutanal (OAV: 15-22), and 3-methylbutanal (OAV: 68-87). Furthermore, the S-curve method was used to research the effect of aroma compounds on the threshold of aroma recombination (AR). The AR thresholds decreased from 3.8 mL to 0.45, 0.66, 0.93, 0.95, 0.75, 1.09, 3.01, and 2.57 mL after addition of eight compounds (skatole, furaneol, (Z)-jasmone, α-damascenone, sclareololide, dihydroactinidiolide, vanillin, and δ-valerolactone), indicating that those compounds (OAV >1) were contributors to the overall aroma of Laoshan teas.

Food Chemistry published new progress about Flame photometric detectors. 78-70-6 belongs to class alcohols-buliding-blocks, and the molecular formula is C10H18O, Electric Literature of 78-70-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts