Month: October 2022

Yan, Jincan; Zeng, Xiangqiong; van der Heide, Emile; Ren, Tianhui published the artcile< The tribological performance and tribochemical analysis of novel borate esters as lubricant additives in rapeseed oil>, Formula: C17H37NO2, the main research area is rapeseed oil lubricant additive borate ester tribofilm XANES XPS.

Two novel borate esters, tris (4-dodecylphenyl) borate and 2-(2-(4-dodecylphenoxy)-1, 3, 6, 2-dioxazaborocan-6-yl) ethanol were synthesized and applied as anti-wear and extreme pressure additives in rapeseed oil. The borate esters possess high anti-wear and extreme pressure properties. XANES and XPS were used to analyze the composition and structure of boundary films at the worn surfaces. It is shown that the additives form a protective film at the rubbed surfaces based on B2O3 and/or BN. B-N synergetic effect was found in the results which suggests that tribofilms composed of BN are to be preferred over tribofilms that consists of B2O3.

Tribology International published new progress about Friction. 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, Formula: C17H37NO2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhang, Liang; Li, Yafei; Wang, Li; Cao, Zhu; Zhang, Qian; Li, Yahong published the artcile< Two β-Diketiminate Zinc Complexes with 1-D Chain and Dinuclear Topologies: Synthesis, Structures, and Catalytic Behavior>, SDS of cas: 190788-60-4, the main research area is preparation zinc diketiminate complex borylation catalyst aryl iodide.

Two zinc complexes, [L1Zn2Et2]n (1) and [L2Zn2Et2] (2), were synthesized by reacting bis(β-diketiminate) ligands H2L1 and H2L2 with ZnEt2. X-ray single-crystal diffraction anal. indicated that compound 1 displays a novel 1-dimensional chain structure. Compound 2 is dinuclear. The two compounds were employed to catalyze the coupling reaction of aryl iodides with B2Pin2. They were both catalytically active toward this transformation. Compound 1 exhibited higher catalytic activity than that of complex 2. The borylation reactions catalyzed by 1 possess the features of milder conditions, high functional group tolerance and wide range of substrate scopes.

European Journal of Inorganic Chemistry published new progress about Aryl iodides Role: RCT (Reactant), RACT (Reactant or Reagent). 190788-60-4 belongs to class ethers-buliding-blocks, and the molecular formula is C13H19BO3, SDS of cas: 190788-60-4.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Falk, Eric; Gasser, Valentina C. M.; Morandi, Bill published the artcile< Synthesis of N-Alkyl Anilines from Arenes via Iron-Promoted Aromatic C-H Amination>, Category: ethers-buliding-blocks, the main research area is arene oxymethylammonium triflate iron catalyst regioselective amination; methyl arylamine preparation; tosyloxy phenylpropyl carbamate iron catalyst regioselective amination; tetrahydroquinoline preparation.

We report both an intermol. C-H amination of arenes to access N-methylanilines and an intramol. variant for the synthesis of tetrahydroquinolines. A newly developed, highly electrophilic aminating reagent was key for the direct synthesis of unprotected N-methylanilines from simple arenes. The reactions display a broad functional group tolerance and employ catalytic amounts of a benign iron salt under mild reaction conditions.

Organic Letters published new progress about Amination catalysts. 10541-78-3 belongs to class ethers-buliding-blocks, and the molecular formula is C8H11NO, Category: ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Ahn, Seongmo; Jang, Jin Hyeok; Kang, Jungtaek; Na, Moony; Seo, Jia; Singh, Vikram; Joo, Jung Min; Byon, Hye Ryung published the artcile< Systematic Designs of Dicationic Heteroarylpyridiniums as Negolytes for Nonaqueous Redox Flow Batteries>, COA of Formula: C3H7BrO, the main research area is systematic designs dicationic heteroarylpyridiniums negolytes nonaqueous redox flow battery.

Many organic redox materials are chem. unstable and sparingly soluble in nonaqueous media. Addnl., the crossover of redox materials and the availability of limited membranes have restricted the examination of the long-term cyclability of these materials in nonaqueous redox flow batteries (RFBs). To overcome these limitations, we developed a new class of pyridinium-based negolytes. The π-conjugation structure of the pyridinium mols. was extended by introducing benzothiazole into the C4-position of pyridinium, which improved the stability of these mols. Cationic ammonium functional groups at the N-substituent suppressed the crossover of the pyridinium negolytes through an anion exchange membrane. Furthermore, the solubility of the negolyte was increased up to ~1 M in acetonitrile and 0.3-0.5 M with tetrabutylammonium bis(trifluoromethanesulfonyl)imide (TBATFSI) and acetonitrile. A 0.1 M solution of the dicationic benzothiazolylpyridinium exhibited 0.0083% capacity-fading rate per cycle in sym. RFBs for 250 cycles and 0.08% in full RFBs comprising the ammonium-substituted ferrocene as a posolyte for 500 cycles.

ACS Energy Letters published new progress about Anion exchange membranes. 6482-24-2 belongs to class ethers-buliding-blocks, and the molecular formula is C3H7BrO, COA of Formula: C3H7BrO.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Tidwell, Thomas T. published the artcile< Oxidation of alcohols to carbonyl compounds via alkoxysulfonium ylides: the Moffat, Swern, and related oxidations>, Electric Literature of 52244-70-9, the main research area is review Compound; review Related; review Moffatt; review Oxidation; review Ylides; review Alkoxysulfonium; review Carbonyl; review Alc; review Swern; review Oxidation.

A review of the article Oxidation of alcs. to carbonyl compounds via alkoxysulfonium ylides: the Moffat, Swern, and related oxidations

Organic Reactions (Hoboken, NJ, United States) published new progress about Organic synthesis. 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Electric Literature of 52244-70-9.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Davidescu, C. M.; Popa, A. published the artcile< Quaternary ammonium salts grafted on gel-type styrene-divinylbenzene copolymers>, Reference of 18312-57-7, the main research area is styrene divinylbenzene copolymer chloromethylated amine quaternization; quaternary ammonium salt styrene divinylbenzene copolymer.

Polymer-grafted quaternary ammonium salts were prepared by polymer-analogous direct quaternization of chloromethylated styrene-7% divinylbenzene copolymers. More simpler procedures for the calculation of the functionalization degrees and the statistical modeling of the structural repetitive unit of the copolymer are reported.

Buletinul Stiintific al Universitatii “Politehnica” din Timisoara Romania, Seria Chimie Industriala si Ingineria Mediului published new progress about Quaternary ammonium compounds, polymers Role: SPN (Synthetic Preparation), PREP (Preparation). 18312-57-7 belongs to class ethers-buliding-blocks, and the molecular formula is C17H37NO2, Reference of 18312-57-7.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhao, Wenfeng; Chi, Xiaoping; Li, Hu; He, Jian; Long, Jingxuan; Xu, Yufei; Yang, Song published the artcile< Eco-friendly acetylcholine-carboxylate bio-ionic liquids for controllable N-methylation and N-formylation using ambient CO2 at low temperatures>, Synthetic Route of 10541-78-3, the main research area is ecofriendly acetylcholine carboxylate bio ionic liquid catalyst methylation formylation; carbon dioxide formylation methylation ionic liquid catalyst.

Catalytic fixation of CO2 to produce valuable fine chems. is of great significance to develop a green and sustainable circulation of excessive carbon in the environment. Herein, a series of nontoxic, biodegradable and recyclable acetylcholine-carboxylate bio-ionic liquids with different cations and anions were simply synthesized for producing formamides and methylamines using atm. CO2 as a carbon source, and phenylsilane as a hydrogen donor. The selectivity toward products was tuned by altering the reaction temperature under solvent or solvent-free conditions. N-Methylamines (ca. 96% yield) were obtained in acetonitrile at 50 °C, while N-formamides (ca. 99% yield) were attained without a solvent at 30 °C. The established bio-ionic liquid catalytic system found a wide range of applicability in substrates and possessed a high potentiality in scale-up to gram-grade production The developed catalytic system was fairly stable, which could be easily reused without an apparent loss of reactivity, possibly due to the strong electrostatic interactions between the cation and anion. The combination of exptl. and computational results explicitly elucidated the reaction mechanism: PhSiH3 activated by a bio-IL was favorable for the formation of silyl formate from hydrosilylation of CO2, followed by a reaction with an amine to give an N-formamide, while an N-methylamine was formed by further hydrosilylation of the N-formamide.

Green Chemistry published new progress about Biodegradable materials. 10541-78-3 belongs to class ethers-buliding-blocks, and the molecular formula is C8H11NO, Synthetic Route of 10541-78-3.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Maillard, Ludovic T.; Benohoud, Meryem; Durand, Philippe; Badet, Bernard published the artcile< A New Supported Reagent for the Parallel Synthesis of Primary and Secondary O-Alkyl Hydroxylamines through a Base-Catalyzed Mitsunobu Reaction>, Formula: C11H16O2, the main research area is supported hydroxyphthalimide parallel synthesis hydroxylamine Mitsunobu reaction; alkylation Mitsunobu alc polymer supported hydroxyphthalimide.

The growing field of applications of O-alkyl hydroxylamines in medicinal chem. and chem. biol. has motivated the search for a parallel synthesis. A solid-phase approach based on the alkylation by alcs. of a new supported N(hydroxy)phthalimide reagent using a Mitsunobu reaction followed by methylaminolysis was optimized. This study points out the importance of the linker and a specific base effect for the Mitsunobu reaction. A large variety of alcs. can be used to give with moderate to high yields diverse O-alkyl hydroxylamines in high purity.

Journal of Organic Chemistry published new progress about Hydroxylamines Role: SPN (Synthetic Preparation), PREP (Preparation) (O-alkyl derivatives). 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Formula: C11H16O2.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Li, Yafei; Dang, Yan; Li, Dawei; Pan, Huifen; Zhang, Liang; Wang, Li; Cao, Zhu; Li, Yahong published the artcile< Zinc Complexes with an Ethylene-Bridged Bis(β-diketiminate) Ligand: Syntheses, Structures, and Applications as Catalysts in the Borylation of Aryl Iodides>, Application In Synthesis of 190788-60-4, the main research area is crystal structure mol zinc complex ethylene bridged bisdiketiminate complex; zinc complex ethylene diketiminate preparation borylation catalyst aryl iodide.

A dinucleating bis(β-diketiminate) ligand with a flexible bridge has been employed to synthesize zinc complexes. The ligand, abbreviated H2L (H2L = N-(4-((2-((4-((2,6-diisopropylphenyl)imino)pent-2-en-2-yl)amino)ethyl)imino)pent-2-en-2-yl)-2,6-diisopropylaniline), was deprotonated with ZnEt2 to afford [LZn2Et2] (1). Reactions of 1 with 2 equiv of BnOH and nBuOH, resp., gave access to [LZn2(OBn)2]·C6H14 (2·C6H14) and [LZn2(OnBu)2] (3). Treatment of 1 with 2 equiv of I2 in THF produced [LZn2I2(THF)2]·2THF (4·2THF). X-ray single-crystal diffraction analyses revealed that they are all heteroleptic bimetallic compounds with two metal centers being chelated by one ligand set. The structurally similar compounds 1 and 4·2THF possess approx. C2 symmetry, with two β-diketiminate units being arrayed in head-to-tail antiparallel mode. Thus, the mol. structures of 1 and 4·2THF exhibit a seesaw-like topol. The structures of 2·C6H14 and 3 are almost identical, in which two zinc atoms are shared by two ZnN2C3 six-membered rings, two Zn2ON2C2 seven-membered rings, and one Zn2O2 four-membered ring. Therefore, the metal cores of 2·C6H14 and 3 display a crownlike topol. All complexes are catalytically active for the borylation of aryl iodides with B2Pin2 (B2Pin2 = 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bis(1,3,2-dioxaborolane)). Complex 1 shows higher activity in comparison to 2, 3, and 4·2THF. The borylation reactions catalyzed by 1 could proceed under mild conditions and can be applied to a series of substrates with high functional group generality. This methodol. thus represents a novel use of β-diketiminate zinc complexes for C-I borylation.

Organometallics published new progress about Aryl iodides Role: RCT (Reactant), RACT (Reactant or Reagent). 190788-60-4 belongs to class ethers-buliding-blocks, and the molecular formula is C13H19BO3, Application In Synthesis of 190788-60-4.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kende, Andrew S.; Curran, Dennis P. published the artcile< Total synthesis of juncusol>, Application In Synthesis of 56724-03-9, the main research area is juncusol total synthesis; cyclization vinylhydroxymethylbiphenyl photochem; biphenyl vinyl hydroxymethyl photocyclization.

Juncusol (I) was prepared from 2,3-Me(MeO)C6H3CHO in 12 steps through coupling of bromide II (R = Br) with iodide II (R = iodo) to give diimine III (R = R1 = (cyclohexylimino)methyl]. The ring skeleton in I was constructed by conversion of the diimine to III (R = CH:CH2, R1 = CH2OH) followed by photocyclization.

Tetrahedron Letters published new progress about Photocyclization. 56724-03-9 belongs to class ethers-buliding-blocks, and the molecular formula is C9H10O2, Application In Synthesis of 56724-03-9.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem