Month: October 2022

Shepherd, Robert G. published the artcile< Sulfonamide preparations in glacial acetic acid>, Application In Synthesis of 112-63-0, the main research area is ACID/acetic; SULFONAMIDES/preparation.

Because in the preparation of N1-(halophenyl)-N4-acetylsulfanilamides (I) in pyridine or PhNMe2 side reactions take place, the use of AcOH as reaction medium was tried and was found to be satisfactory. In general, 1 mol. aniline in 400-1000 cc. glacial AcOH is heated at 100æŽ?and treated with a 25% excess of the appropriate sulfonyl chloride. With some anilines the amine-HCl seps. and dissolves on addition of NaOAc. The latter is added in 0.5, 0.25, 0.125, and 0.125 mol. portions with an addnl. 0.25 mol. After each addition the mixture is brought to a boil, H2O is added with stirring, and the clear mixture cooled, causing the separation of I. The following p-AcHNC6H4SO2NHC6H2RR’R” are prepared with the following substituents on the N1-Ph residue: none, 90%, m. 214-15æŽ? 3,5-di-Cl 87%, m. 239-40æŽ? 3,5-di-Br, 83%, m. 242-3æŽ? 3,4,5-tri-Cl, 85%, m. 272-3æŽ? 2-OMe, 84%, m. 212-13æŽ? 3-OMe, 68%, m. 192-3æŽ? 4-OMe, 90%, m. 200-1æŽ? 3-NO2, 74%, m. 244-5æŽ? 4-NO2, 56%, m. 263-4æŽ? 4-NHAc, 50%, m. 293-4æŽ? Also prepared were: p-O2NC6H4SO2NHC6H3Br2-3,5, 92%, m. 175-6æŽ? PhSO2NHPh, 89%, m.1 12-13æŽ? PhSO2NHC6H4Cl-p, 91%, m. 122-3æŽ? PhSO2NHC6H3Br2-3,5, 77%, m. 130-1æŽ? In addition to these compounds, 0.2-0.5% PhNHAc is usually formed. For a study of side-reactions, 3.9 g. AcHNC6H4SO2Cl in 10 cc. hot AcOH containing 0.3 g. H2O is treated with 2.7 g. AcONa, causing the separation of 3.6 g. precipitate which on hydrolysis gives 99% PhNH2. When a mixture of 17.7 g. PhSO2Cl (II) and 4.5 g. (CO2H)2 is heated to 200æŽ?and the volatile material distilled off in vacuo, 46% (PhSO2)2O, m. 92æŽ? is obtained. PhSO2Cl and AcONa at 230æŽ?give a distillate containing AcCl, Ac2O, and AcOH with PhSO3Na and unchanged II as residue. When 9.3 g. PhNH2 and 17.7 g. PhSO3Et in 50 cc. AcOH are heated at 90æŽ?0.5 h., and the mixture is diluted with N HCl and extracted with ether, 1% PhSO2NHPh, m. 114æŽ? is obtained. The aqueous solution is made alk., extracted with ether, and the ether residue treated with p-MeC6H4SO2Cl, giving N-(p-tolylsulfonyl)-N-ethylaniline, m. 88æŽ? Bromination of 224 g. p-O2NC6H4NH2 in 2 l. AcOH at 65æŽ?by addition of 520 g. Br in 1200 cc. AcOH over a period of 4 h. gives 95% 2,6-dibromo-4-nitroaniline (III), m. 204-6æŽ? III is diazotized with ONSO3H according to Hodgson and Walker (C.A. 28, 1325.9) and deaminated according to H. and Turner (C.A. 37, 1421.3), giving 70% 3,5-Br2C6H3NO2 (IV), m. 106æŽ? Catalytic reduction of IV with Raney Ni in absolute EtOH at room temperature and atm. pressure gives 80% 3,5-Br2C6H3NH2, m. 56-7æŽ? with SnCl2 the yield is 64% and with Na2S2O4 only 25%. 3,4,5-Cl3C6H2NH2 is prepared in 70% yield by converting 2,6,4-Cl2(O2N)C6H2NH2 into 3,4,5-Cl3C6H2NO2 according to H. and W., followed by reduction with Raney Ni.

Journal of Organic Chemistry published new progress about Reduction. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Eckermann, Ruben; Breunig, Michael; Gaich, Tanja published the artcile< Formal Total Synthesis of (�-Strictamine by [2,3]-Sigmatropic Stevens Rearrangements>, Recommanded Product: Methyl 2-(2-nitrophenyl)acetate, the main research area is strictamine formal total synthesis sigmatropic Stevens rearrangement; Stevens rearrangement; [2,3]-sigmatropic rearrangement; alkaloids; diazo compounds; total synthesis.

To date, more than 100 congeners of the akuammiline alkaloid family have been isolated. Their signature structural element is a methanoquinolizidine moiety, a cage-like scaffold structurally related to adamantane. The structural variations of the family members originate from oxidative processes that mostly trigger rearrangements of the methanoquinolizidine motif. The family of the akuammiline alkaloids is best represented by strictamine. It bears the least functionalized carbon skeleton of all family members without lacking the signature structural motifs. Herein, we report the formal synthesis of (�-strictamine (I) through a Stevens [2,3]-sigmatropic rearrangement as a key step and the synthetic pitfalls related with its synthesis.

Chemistry – A European Journal published new progress about [2,3]-Sigmatropic rearrangement. 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Recommanded Product: Methyl 2-(2-nitrophenyl)acetate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jiang, Jin-Jin; Zhang, Guo-Fu; Zheng, Jia-Yi; Sun, Ji-Hu; Ding, Shi-Bin published the artcile< Targeting mitochondrial ROS-mediated ferroptosis by quercetin alleviates high-fat diet-induced hepatic lipotoxicity>, Electric Literature of 347174-05-4, the main research area is hepatic lipotoxicity quercetin ferroptosis reactive oxygen species hepatocyte; ferroptosis; hepatic lipotoxicity; mitochondrial ROS; nonalcoholic fatty liver disease; quercetin.

The protective effect of quercetin on nonalcoholic fatty liver disease (NAFLD) has been reported, but its mechanism remains poorly understood. Recently, quercetin was reported to be capable of inhibiting ferroptosis, which is a recognized type of regulated cell death. Moreover, hepatic ferroptosis plays an important role in the progression of NAFLD, but exptl. evidence is limited. Hence, our study aimed to investigate the effect of quercetin on hepatic ferroptosis in high-fat diet (HFD)-induced NAFLD and further elucidate the underlying mol. mechanism. C57BL/6J mice were fed either a normal diet (ND), an HFD, or an HFD supplemented with quercetin for 12 wk. Hepatic lipid peroxidation, steatosis, ferroptosis and iron overload were examined In vitro, steatotic L-02 cells was used to study the potential mechanism. We found that the HFD caused lipid peroxidation, lipid accumulation and ferroptosis in the liver, which were rescued by quercetin supplementation. Consistent with the in vivo results, quercetin alleviated lipid droplet accumulation and reduced the levels of lipid reactive oxygen species (ROS) and ferroptosis in steatotic L-02 cells. Using a mitochondrial ROS (MtROS) scavenger (Mito-TEMPO) and ferroptosis specific inhibitor (Fer-1), we found that quercetin remarkably alleviated lipid droplet accumulation and lipid peroxidation by reducing MtROS-mediated ferroptosis in steatotic L-02 cells. Our data showed that HFD consumption induced lipid accumulation and triggered ferroptosis in liver, ultimately leading to hepatic lipotoxicity, which can be alleviated by quercetin. Findings from this study provide new insight into the mechanism by which quercetin can be used for the prevention and treatment of NAFLD.

Frontiers in Pharmacology published new progress about Bioaccumulation. 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Electric Literature of 347174-05-4.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yi, Qing-yan; Guo, Xu; Xin, Li-li; Qin, Si-ning; Zhang, Hui; Xu, Yong-nan published the artcile< Synthesis of 5-(cycloalkane)-2H-pyran-2-one derivatives>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is cycloalkanepyranone derivative coupling agent antitumor agent preparation.

Some 5-(substituted)-2H-pyran-2-one derivatives were designed and synthesized, and higher derivatives of anti-cancer activity were filtered out. Eight 2-pyrone compounds were synthesized by the multi-step reaction using a variety of 4-substituted cyclohexanone. Eight new 5-(cycloalkane)-2H-pyran-2-one derivatives were synthesized, and the structures of the new compounds were characterized by 1H NMR and MS techniques.

Shenyang Yaoke Daxue Xuebao published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pan, Fei; Wu, Bin; Shi, Zhang-Jie published the artcile< Cu-Catalyzed Intramolecular Amidation of Unactivated C(sp3)-H Bonds To Synthesize N-Substituted Indolines>, Application In Synthesis of 30095-98-8, the main research area is indoline preparation intramol amidation unactivated aniline bond; C鈭扝 activation; copper; indoline; radical; synthetic methods.

A copper-catalyzed intramol. amidation of unactivated C(sp3)-H bonds to construct indoline derivatives has been developed. Such an amidation proceeded well at primary C-H bonds preferred to secondary C-H bonds. The transformation owned a broad substrate scope. The corresponding indolines were obtained in good to excellent yields. N-Formal and other carbonyl groups were suitable and were easily deprotected and transformed into Me or long-chained alkyl groups. Preliminary mechanistic studies suggested a radical pathway.

Chemistry – A European Journal published new progress about Amidation (Intramol.). 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Application In Synthesis of 30095-98-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Semenycheva, Lyudmila; Chasova, Victoria; Matkivskaya, Julia; Fukina, Diana; Koryagin, Andrey; Belaya, Tatiana; Grigoreva, Alexandra; Kursky, Yuri; Suleimanov, Evgeny published the artcile< Features of Polymerization of Methyl Methacrylate using a Photocatalyst-the Complex Oxide RbTe1.5W0.5O6>, Reference of 112-63-0, the main research area is rubidium tungsten tellurate photocatalyst methyl methacrylate polymerization.

Radical polymerization of Me methacrylate in an aqueous emulsion was carried out using the complex oxide RbTe1.5W0.5O6 as a photoinitiator under visible light irradiation with �= 400-700 nm. Study of the polymerization process and reaction products using methods of phys. and chem. anal. (GPC, IR, NMR, etc.) has shown that there are several directions of monomer transformations at the same time. Polymethyl methacrylate with Mn �140-145 kDa, produced in the organic phase, is a result of polymerization initiation by a hydroxyl radical formed due to complex transformations of electron-hole pairs during photocatalyst irradiation Moreover, the interaction of the hydroxyl radical with OH-groups on the complex oxide RbTe1.5W0.5O6 surface and the subsequent formation of oxygen-centered radicals lead to grafting polymer macromols. on the photocatalyst surface. In addition, Me methacrylate is able to oxidize to a cyclic dimer with terminal double bonds and form a polymer with cyclic dimer links due to coordination by double bonds on the RbTe1.5W0.5O6 surface. The high activity of the hydroxyl radical allows to obtain the graft copolymer PMMA-pectin by grafting the polymer product on the surface of the natural polymer-pectin. Comparison of the sponge morphol. of the graft copolymer PMMA-pectin and the initial pectin samples using the SEM has shown a noticeable difference in their structural and topol. organization. It is especially interesting in terms of studying the properties of the graft copolymer as a material for the scaffolds.

Journal of Inorganic and Organometallic Polymers and Materials published new progress about Absorption. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhou, Jiading; Li, Weimin; Kong, Congcong; Li, Dongyang; Cui, Zhijian; Xue, Yinghao; Lu, Yuhan; Ren, Qinggong published the artcile< Preparation of a novel ionic liquid and its application in the synthesis of trimethylolpropane trioleate>, COA of Formula: C19H34O2, the main research area is oleic acid esterification catalyst ionic liquid thermal stability.

The 1-(3-sulfopropyl)-3-vinylimidazole inner salt was prepared through the reaction of 1-vinylimidazole and 1,3-propanesultone, and then, it was mixed with different acids to synthesize three kinds of vinylimidazole acidic ionic liquids The three ionic liquids (ILs) were used as catalysts for the catalytic synthesis of trimethylolpropane trioleate, and the effects of the catalyst amount, reaction time, reaction temperature, and molar ratio of reactants on the catalytic activity were studied. The esterification rates obtained using the three ILs as catalysts could reach 95.82%, 95.37%, and 97.88%. The catalytic kinetics of the synthesized ionic-liquid catalyst was studied, and the activation energies of the forward and reverse reactions were 13.9872 kJ mol-1 and 13.9918 kJ mol-1, and the pre-exponential factors were 2.781 x 10-2 L mol-1 h-1 and 4.835 x 10-5 L mol-1 h-1, resp. The vinylimidazole acidic ILs showed good catalytic activity in the esterification reaction; thus, the catalysts are suitable for esterification reaction systems and valuable for research. Moreover, the existence of double bonds paves a way for the subsequent research on polymerized ionic liquids

Reaction Kinetics, Mechanisms and Catalysis published new progress about Esterification. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

de las Heras, Laura A.; Esteruelas, Miguel A.; Olivan, Montserrat; Onate, Enrique published the artcile< Rhodium-Promoted C-H Bond Activation of Quinoline, Methylquinolines, and Related Mono-Substituted Quinolines>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is rhodium diphosphinoxanthene pincer complex carbon hydrogen bond activation quinoline; diphosphinoxanthene rhodium quinolinyl pincer complex preparation crystal structure; mol structure diphosphinoxanthene rhodium quinolinyl pincer complex.

The C-H bond activation of methylquinolines, quinoline, 3-methoxyquinoline, and 3-(trifluoromethyl)quinoline promoted by the square-planar Rh(I) complex RhH{é­?-P,O,P-[xant(PiPr2)2]} [1; xant(PiPr2)2 = 9,9-dimethyl-4,5-bis(diisopropylphosphino)xanthene] was systematically studied. The activation of the heteroring is preferred over the activation of the carbocycle, and the activated position depends upon the position of the substituent in the substrate. Thus, 3-, 4-, and 5-methylquinoline reacts with 1 to quant. form square-planar Rh(I)-(2-quinolinyl) derivatives, whereas 2-, 6-, and 7-methylquinoline quant. leads to Rh(I)-(4-quinolinyl) species. By contrast, quinoline and 8-methylquinoline afford mixtures of the resp. Rh(I)-(2-quinolinyl) and -(4-quinolinyl) complexes. 3-Methoxyquinoline displays the same behavior as that of 3-methylquinoline, while 3-(trifluoromethyl)quinoline yields a mixture of Rh(I)-(2-quinolinyl), -(4-quinolinyl), -(6-quinolinyl), and -(7-quinolinyl) isomers.

Organometallics published new progress about C-H bond activation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Cramer, David L.; Bera, Srikrishna; Studer, Armido published the artcile< Exploring Cooperative Effects in Oxidative NHC Catalysis: Regioselective Acylation of Carbohydrates>, Product Details of C19H34O2, the main research area is regioselective acylation oxidative esterification catalyst amino linked neodisaccharide preparation; N-heterocyclic carbene; carbohydrates; cooperative catalysis; organocatalysis; synthetic methods.

The utility of oxidative N-heterocyclic carbene (NHC) catalysis for both the regioselective and chemoselective functionalization of carbohydrates is explored. Chiral NHCs allow for the highly regioselective oxidative esterification of various carbohydrates using aldehydes as acylation precursors. The transformation was also shown to be amenable to both cis/trans diol isomers, free amino groups, and selective for specific sugar epimers in competition experiments Efficiency and regioselectivity of the acylation can be improved upon using two different NHC catalysts that act cooperatively. The potential of the method is documented by the regioselective acylation of an amino-linked neodisaccharide.

Chemistry – A European Journal published new progress about Acylation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Suzuki-Karasaki, Manami; Ando, Takashi; Ochiai, Yushi; Kawahara, Kenta; Suzuki-Karasaki, Miki; Nakayama, Hideki; Suzuki-Karasaki, Yoshihiro published the artcile< Air Plasma-Activated Medium Evokes a Death-Associated Perinuclear Mitochondrial Clustering>, Safety of Ethyl 3-amino-4-(cyclohexylamino)benzoate, the main research area is air plasma activated medium perinuclear mitochondrial clustering; ROS; cancer; cell death; lipid peroxidation; mitochondrial network; mitochondrial positioning; perinuclear mitochondrial clustering; plasma-activated medium.

Intractable cancers such as osteosarcoma (OS) and oral cancer (OC) are highly refractory, recurrent, and metastatic once developed, and their prognosis is still disappointing. Tumor-targeted therapy, which eliminates cancers effectively and safely, is the current clin. choice. Since aggressive tumors are substantially resistant to multidisciplinary therapies that target apoptosis, tumor-specific activation of another cell death modality is a promising avenue for meeting this goal. Here, we report that a cold atm. air plasma-activated medium (APAM) can kill OS and OC by causing a unique mitochondrial clustering. This event was named monopolar perinuclear mitochondrial clustering (MPMC) based on its characteristic unipolar mitochondrial perinuclear accumulation. The APAM caused apoptotic and nonapoptotic cell death. The APAM increased mitochondrial ROS (mROS) and cell death, and the antioxidants such as N-acetylcysteine (NAC) prevented them. MPMC occurred following mitochondrial fragmentation, which coincided with nuclear damages. MPMC was accompanied by mitochondrial lipid peroxide (mLPO) accumulation and prevented by NAC, Ferrostatin-1, and Nocodazole. In contrast, the APAM induced minimal cell death, mROS generation, mLPO accumulation, and MPMC in fibroblasts. These results suggest that MPMC occurs in a tumor-specific manner via mitochondrial oxidative stress and microtubule-driven mitochondrial motility. MPMC induction might serve as a promising target for exerting tumor-specific cytotoxicity.

International Journal of Molecular Sciences published new progress about Air (plasma-activated medium). 347174-05-4 belongs to class esters-buliding-blocks, and the molecular formula is C15H22N2O2, Safety of Ethyl 3-amino-4-(cyclohexylamino)benzoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics