Day: December 2, 2022

Das, Kanu published the artcileN-Alkylation of Amines Catalyzed by a Ruthenium-Pincer Complex in the Presence of in situ Generated Sodium Alkoxide, Recommanded Product: 4-Methoxy-N-methylaniline, the main research area is secondary amine preparation density functional theory; alc primary amine alkylation ruthenium catalyst.

The use of ruthenium-NNN-pincer complexes of the type (R2NNN)RuCl2(PPh3) (R = tBu, iPr, Cy and Ph) for the catalytic N-alkylation of primary amines R-NH2 (R = Ph, propan-2-yl, thiophen-2-ylmethyl, etc.) under solvent-free conditions were reported. For the first time, the base that is required to promote these reactions is generated in situ from the alcs. R1-OH (R1 = Bu, (4-fluorophenyl)methyl, furan-2-ylmethyl, etc.) by the use of sodium. The resulting sodium alkoxide regenerates the alcs. substrate while acting as the water scavenger thus mitigating the need of an addnl. base. Among the catalysts screened, (tBu2NNN)RuCl2(PPh3) (0.02 mol-%) gives very high turnovers and good yields at 140 °C. The (tBu2NNN)RuCl2(PPh3) catalyzed N-alkylation tolerates a variety of amine and alc. substrates. While excellent turnover (29000) was obtained for the (tBu2NNN)RuCl2(PPh3) (0.002 mol-%) catalyzed alkylation of aniline with cyclohexyl methanol, the turnovers obtained in the corresponding catalytic methylation of p-anisidine was also very high (12000). The (tBu2NNN)RuCl2(PPh3) catalyzed reactions have also been accomplished under open-vessel conditions resulting in a net dehydrogenative coupling reaction. This protocol has been used to transform benzene-1,2-diamine to benzimidazoles I (R2 = H, F, OMe) with high productivity (12000 turnovers). DFT studies indicate that while β-hydride elimination is rate-determining (RDTS: 24.31 kcal/mol) for the alc. dehydrogenation segment which is endothermic, insertion of the imine is rate-determining (RDTS: 11.26 kcal/mol) for its hydrogenation that is exothermic.

European Journal of Organic Chemistry published new progress about Alkylation. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Recommanded Product: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Li, Kai published the artcileEnhanced Acidity and Activity of Aluminum/Gallium-Based Ionic Liquids Resulting from Dynamic Anionic Speciation, COA of Formula: C8H10O2, the main research area is acidity activity aluminum gallium based ionic liquid anionic speciation; Friedel Crafts acylation alkylation reaction catalyst.

To explore if the catalytic activity of single-metal species in halometallate catalysts can be enhanced with mixed-metal species, aluminum and gallium were simultaneously introduced to prepare a mixed-metal ionic liquid (IL) through a one-pot reaction of [HN222]Cl, AlCl3, and GaCl3 in various amounts The Lewis acidity in Friedel-Crafts acylation and alkylation reactions of these IL compositions were evaluated and all mixed-metal [HN222][xAlCl3 + (2 – x)GaCl3]Cl ILs exhibited higher catalytic activity than AlCl3, GaCl3, [HN222][Al2Cl7], or [HN222][Ga2Cl7]. The broadening in 27Al NMR of these ILs indicates the presence of dynamic anionic species, whereas matrix-assisted laser-desorption ionization time-of-flight (MALDI-TOF) and acetonitrile-probed Fourier transform IR (FT-IR) analyses correlates the structure-activity relationship, for instance, identifying the presence of mixed-metal-containing [Cl2GaOClAlClOGaCl2]- species in the better-performing ILs.

ACS Catalysis published new progress about Alkylation. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, COA of Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Navale, Balu S. published the artcilePropargyl α-aryl-α-diazoacetates as robust reagents for the effective C-H bond functionalization of 1,3-diketones via scandium catalysis, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is propargyl aryl dicarbonyl compound preparation; diketone propargyl aryl diazoacetate alkylation scandium catalyst.

Propargyl α-aryl-α-diazoacetates RC(=N2)C(O)OCH2CCH [R = 4-ClC6H4, naphthalen-2-yl, 3,4-(H3CO)2C6H3, etc.] a new class of reagents is developed for the effective C-H bond functionalization of 1,3-diketones R1C(O)CH2C(O)R1 (R1 = Me, Et, Ph, 4-H3CC6H4, 4-H3COC6H4) at room temperature The combination of scandium triflate and propargyl α-aryl-α-diazoacetates proved to be efficient catalyst-reagent system for the controlled C-H bond functionalization to afford 1,3-dicarbonyl alkylation products RCH(CH(C(O)R1)2)C(O)OCH2CCH. The protocol uses inexpensive Sc(OTf)3 (5 mol%) and the reaction did not require the use of expensive catalysts or ligands and worked efficiently at room temperature The practicality of the protocol has been demonstrated by the gram scale synthesis.

Tetrahedron Letters published new progress about Alkylation. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Recommanded Product: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Denis, Camille published the artcileSynthesis of 3,3-Diarylazetidines by Calcium(II)-Catalyzed Friedel-Crafts Reaction of Azetidinols with Unexpected Cbz Enhanced Reactivity, SDS of cas: 151-10-0, the main research area is diarylazetidines preparation calcium catalyzed Friedel Crafts reaction; alkylation Cbz azetidine phenol intermediate carbocation.

Azetidines are valuable motifs that readily access under explored chem. space for drug discovery. 3,3-Diarylazetidines are prepared in high yield from N-Cbz azetidinols in a calcium(II)-catalyzed Friedel-Crafts alkylation of (hetero)aromatics and phenols, including complex phenols such as β-estradiol. Electron poor phenols undergo O-alkylation. The product azetidines can be derivatized to drug-like compounds through the azetidine nitrogen and the aromatic groups. The N-Cbz group is crucial to reactivity by providing stabilization of an intermediate carbocation on the four-membered ring.

Organic Letters published new progress about Alkylation. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, SDS of cas: 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Li, Jiacheng published the artcileMinisci-Type Alkylation of N-Heteroarenes by N-(Acyloxy)phthalimide Esters Mediated by a Hantzsch Ester and Blue LED Light, Application In Synthesis of 104-01-8, the main research area is alkylated quinoline preparation; quinoline acyloxy phthalimide ester Minisci type alkylation HE mediated; isoquinoline alkylated preparation; acyloxy phthalimide ester isoquinoline Minisci type alkylation HE mediated; pyridine alkylated preparation; phthalimide ester acyloxy pyridine Minisci type alkylation HE mediated.

A synthetic method that enabled the Hantzsch ester (HE)-mediated Minisci-type C2-alkylation of quinolines, isoquinolines and pyridines by N-(acyloxy)phthalimide esters (NHPI) to afford alkylated N-heterocyclic products, e.g., I, under blue LED (light emitting diode) light (456 nm) was described. Achieved under mild reaction conditions at room temperature, the metal-free synthetic protocol was shown to be applicable to primary, secondary and tertiary NHPIs to give the alkylated N-heterocyclic products in yields of 21-99%. On introducing a chiral phosphoric acid, an asym. version of the reaction was also realized and provided product enantiomeric excess (ee) values of 53-99%.

Advanced Synthesis & Catalysis published new progress about Alkylation. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Application In Synthesis of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Dong, Zheng-Yu published the artcileThe application of UV-C laser in persulfate activation for micropollutant removal: Case study with iodinated X-ray contrast medias, Recommanded Product: Diatrizoic Acid, the main research area is UV laser micropollutant removal iodinated X ray contrast media; Electron shuttle; Hydroxyl radical; Iodinated X-ray contrast media; Sulfate radical; UV-C laser.

A novel light source UV-C laser was applied in persulfate (PS) activation to effectively remove iodinated X-ray contrast medias (ICMs) including iohexol (IOX), iopamidol (IPM) and diatrizoate (DTZ) in this study. Significant ICMs degradation was observed in UV-C laser/PS systems with pseudo first-order rate constants of 0.022-0.067 s-1. Sulfate radicals (SO·-4) were the main active species in the three ICMs degradation, and the steady-state concentrations ([SO·-4]ss) were 3.629 x 10-11 M (IOX), 1.702 x 10-11 M (IPM) and 1.148 x 10-11 M (DTZ), resp. Under the high intensity of UV-C laser, the optimal reaction efficiency was achieved at pH = 7.0 with PS concentration of 1.0 mM, and the degradation efficiency for IOX reached 93.8% within only 40 s. Both bicarbonate and chloride ions could inhibit the three ICMs degradation and the inhibition rate increased with the increase of ions concentration The kinetic models were established and the steady-state concentrations of radicals were calculated D. functional theory (DFT) calculations combined with experiments were used to derive the reaction pathways for three ICMs. Cyclic voltammetry measurements detected a lower redox potential peak in IOX degradation, revealing the existence of electron shuttles under the UV-C laser irradiation to promote the redox reaction. This study is the first report of UV-C laser activation of persulfate. It is a new advanced oxidation process mediated by very effective photolysis and active species formation.

Science of the Total Environment published new progress about Alkalinity. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Recommanded Product: Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Azerrad, Sara P. published the artcileTransformation of X-ray contrast media in reverse osmosis brines by advanced oxidation processes, Application In Synthesis of 117-96-4, the main research area is iopromide diatrizoate RO brine advanced oxidation process wastewater treatment.

The transformation of two X-rays contrast media iopromide (IOPr; non-ionic) and diatrizoate (DTZ; ionic) in reverse osmosis (RO) brines during UVA-TiO2 oxidation was investigated. The scavenging effect of chlorides, alkalinity and fulvic acid (HA) was comparatively evaluated against ultrapure water. The transformation of both compounds followed a pseudo-first reaction order, but rate of IOPr oxidation was higher than DTZ regardless of the water matrix. In ultrapure water, 98% IOPr transformation was achieved compared to only 42% for DTZ after a 6 h experiment In contrast, transformation was significantly reduced in RO brines with only 18 and 9% transformation for IOPr and DTZ, resp., whereas chlorides displayed very low to none scavenging effect, fulvic acid and alkalinity decreased rate constants by about 50% due to competitive radicals scavenging. The scavenging effect of HA was more evident for DTZ than IOPr. The ratio of deiodination/transformation was higher in DTZ, indicating that the initial transformation involves deiodination, e.g. takes place predominantly in the triiodinated skeleton. In contrast, the ratio of deiodination/transformation was lower in IOPr, indicating that the initial transformation proceeds without deiodination, e.g. takes place predominantly in the side chains. Finally, in both cases, kinetic experiments showed that oxidation leads to iodide evolution without iodate formation.

Desalination and Water Treatment published new progress about Alkalinity. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Application In Synthesis of 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Jiang, J.-Q. published the artcileDrinking water treatment by in situ generated ferrate(VI), COA of Formula: C11H9I3N2O4, the main research area is ferrate organic micropollutant disinfection coagulation drinking water treatment.

The present study aims to investigate the efficiency of on-site produced ferrate(VI) for drinking water treatment as well as for the removal of micro pollutants. The study examined and validated the laboratory electrochem. production of ferrate(VI) and tested water treatment efficiency of the resulting ferrate(VI) in comparison with that of FeClSO4 and poly-aluminum chloride (PACl). The performance of water treatment was compared by the removal efficiency of turbidity, dissolved organic carbon, microbial count and trace organic micro pollutants. Major observations were that 0.5 mg/L of ferrate(VI) as Fe was sufficient to remove most of the contaminants and achieve complete disinfection irresp. of the original microbial counts. Ferrate(VI) has considerable oxidation potential to degrade commonly occurring trace organic micropollutants (other than melamine) in the Danube River water. In contrast, FeClSO4 or PACl cannot remove any trace micro pollutants.

Desalination and Water Treatment published new progress about Alkalinity. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, COA of Formula: C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Tian, Haiyuan published the artcileRecovery of natural products from deep eutectic solvents by mimicking denaturation, Application of 1-Methylurea, the main research area is deep eutectic solvent denaturation flavonoid natural product extraction adsorption; MIL 100 Cr synthesis flavonoid extraction Flos sophorae.

A strategy was developed to recover natural products from deep eutectic solvents based on denaturation of the solvents. A method similar to nucleic acid denaturation was used to disrupt the intermol. forces in the deep eutectic solvents to reduce their ability to solubilize and interact with the flavonoids at recovery. MIL-100 (Cr) was added to the system for sorptive separation and recovery of the target compounds from the denaturized deep eutectic solvents. The factors affecting denaturation of the deep eutectic solvents and adsorption of the target compounds were systematically investigated and optimized. The recovery method was further combined with mechanochem. extraction to establish a convenient and efficient protocol for obtaining natural products from plants. Moreover, due to the conjugated structure of MIL-100 (Cr), the adsorbed natural products could be directly analyzed by atm. matrix assisted laser desorption ionization-mass spectrometry (AP/MALDI-MS) without elution. This study provided a strategy for improving the efficiency of separation and recovery of natural products using deep eutectic solvents and also established a protocol for obtaining or analyzing natural products in a green, efficient, and convenient manner.

ACS Sustainable Chemistry & Engineering published new progress about Adsorption. 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Application of 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhuang, Xiuzheng published the artcileSelective catalysis for the reductive amination of furfural toward furfurylamine by graphene-co-shelled cobalt nanoparticles, Name: 2,3-Dimethoxybenzaldehyde, the main research area is graphene cobalt catalyst furfural reductive amination furfurylamine.

Amines with functional groups are widely used in the manufacture of pharmaceuticals, agricultural chems., and polymers but most of them are still prepared through petrochem. routes. The sustainable production of amines from renewable resources, such as biomass, is thus necessary. For this reason, we developed an eco-friendly, simplified, and highly effective procedure for the preparation of a non-toxic heterogeneous catalyst based on earth-abundant metals, whose catalytic activity on the reductive amination of furfural or other derivatives (more than 24 examples) proved to be broadly available. More surprisingly, the cobalt-supported catalyst was found to be magnetically recoverable and reusable up to eight times with an excellent catalytic activity; on the other hand, the gram-scale tests catalyzed by the same catalyst exhibited the similar yield of the target products in comparison to its smaller scale, which was comparable to the com. noble-based catalysts. Further results from a series of anal. technologies involving XRD, XPS, TEM/mapping, and in situ FTIR revealed that the structural features of the catalyst are closely in relation to its catalytic mechanisms. In simple terms, the outer graphitic shell is activated by the electronic interaction as well as the induced charge redistribution, enabling the easy substitution of the -NH2 moiety toward functionalized and structurally diverse mols., even under very mild industrially viable and scalable conditions. Overall, this newly developed catalyst introduces the synthesis of amines from biomass-derived platforms with satisfactory selectivity and carbon balance, providing cost-effective and sustainable access to the wide applications of reductive amination.

Green Chemistry published new progress about Adsorption. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Name: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem