Month: November 2022

Li, Yufei published the artcileVisible-Light-Induced Photocatalyst-Free Radical Trifluoromethylation, Recommanded Product: 4-Methoxy-N-methylaniline, the main research area is heteroarene trifluoromethyl thianthrenium salt trifluoromethylation; trifluoromethyl heteroarene preparation; hydrazone trifluoromethyl thianthrenium salt trifluoromethylation; trifluoromethylhydrazone preparation; acrylamide trifluoromethyl thianthrenium salt trifluoromethylation; trifluoroethylindolinone preparation.

An attractive, versatile, and operationally simple, visible-light-induced, transition-metal-free, photocatalyst-free, and oxidant-free trifluoromethylation has been demonstrated. Triflic anhydride (Tf2O), being inexpensive and readily available, was chosen as the radical trifluoromethyl source. Thianthrene was used as a recyclable Tf2O-activating reagent, and a high-yielding and scalable trifluoromethylation reaction was achieved. D. functional theory and mechanistic studies showed that a free radical homolytic process excited by visible light is involved in this reaction, generating a key trifluoromethyl radical intermediate.

Organic Letters published new progress about Anilines Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Zhang, Mingjun published the artcileGeneration and precise control of sulfonyl radicals: visible-light-activated redox-neutral formation of sulfonates and sulfonamides, Synthetic Route of 5961-59-1, the main research area is arylmethacrylamide dimethylsulfamoyl chloride iridium catalyst photochem sulfonation radical cyclization; sodium dimethyl oxoindolinyl methanesulfonate preparation; alkylsulfamoyl chloride arylmethacrylamide iridium catalyst photochem sulfonation radical cyclization; oxoindolinyl methanesulfonamide preparation.

A protocol for the generation and precise control of the sulfonyl radical from dimethylsulfamoyl chloride was reported. Different kinds of alkyl sulfonates and sulfonamides were efficiently and selectively obtained under redox-neutral conditions by controlling the reactivity of photocatalysts. A mechanism for the generation of sulfamoyl and sulfonate radicals from dimethylsulfamoyl chloride and the followed sulfonation and sulfonamidation were proposed. This reaction system offers a distinct advantage over traditional oxidation or reduction sulfonation methods in not requiring the use of sulfur dioxide, sulfonic acid, a stoichiometric reductant, or a stoichiometric oxidant. Thus, it should be of practical value for the late-stage functionalization of natural products or medicines.

Organic Chemistry Frontiers published new progress about Alkanesulfonates Role: SPN (Synthetic Preparation), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Synthetic Route of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Ming-Zhong published the artcileSynthesis of hydroxyl-containing oxindoles and 3,4-dihydroquinolin-2-ones through Oxone-mediated cascade arylhydroxylation of activated alkenes, Related Products of isoquinoline, the main research area is phenyl acrylamide Oxone promoter regioselective tandem arylhydroxylation green chem; hydroxymethyl oxindole preparation; alkenylamido benzene Oxone diastereoselective regioselective tandem arylhydroxylation green chem; hydroxy dihydroquinolinone preparation.

Herein, the first Oxone-mediated direct arylhydroxylation of activated alkenes were developed for the synthesis of valuable hydroxyl-containing oxindoles and 3,4-dihydroquinolin-2-ones. The products were controlled by adjusting the structure of the initial alkenes. Moreover, the reaction were performed under simple conditions without any external additives or catalysts. Primary mechanistic studies showed that this reaction were a tandem process involving epoxidation and subsequent Friedel-Crafts alkylation, and oxone played a dual role (both the oxidant and proton source) in this process.

Green Chemistry published new progress about Alcohols Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Karmel, Caleb published the artcileIridium-Catalyzed Silylation of C-H Bonds in Unactivated Arenes: A Sterically Encumbered Phenanthroline Ligand Accelerates Catalysis, Formula: C8H10O2, the main research area is phenanthroline ligand iridium catalyzed silylation unactivated arene.

We report a new system for the silylation of aryl C-H bonds. The combination of [Ir(cod)(OMe)]2 and 2,9-Me2-phenanthroline (2,9-Me2-phen) catalyzes the silylation of arenes at lower temperatures and with faster rates than those reported previously, when the hydrogen byproduct is removed, and with high functional group tolerance and regioselectivity. Inhibition of reactions by the H2 byproduct is shown to limit the silylation of aryl C-H bonds in the presence of the most active catalysts, thereby masking their high activity. Anal. of initial rates uncovered the high reactivity of the catalyst containing the sterically hindered 2,9-Me2-phen ligand but accompanying rapid inhibition by hydrogen. With this catalyst, under a flow of nitrogen to remove hydrogen, electron-rich arenes, including those containing sensitive functional groups, undergo silylation in high yield for the first time, and arenes that underwent silylation with prior catalysts react over much shorter times with lower catalyst loadings. The synthetic value of this methodol. is demonstrated by the preparation of key intermediates in the synthesis of medicinally important compounds in concise sequences comprising silylation and functionalization. Mechanistic studies demonstrate that the cleavage of the aryl C-H bond is reversible and that the higher rates observed with the 2,9-Me2-phen ligand are due to a more thermodynamically favorable oxidative addition of aryl C-H bonds.

Journal of the American Chemical Society published new progress about Benzenoid aromatic compounds Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Kreisel, Tatjana published the artcileModular Generation of (Iodinated) Polyarenes Using Triethylgermane as Orthogonal Masking Group, Safety of 4-Methoxy-N-methylaniline, the main research area is polyarene preparation; triethylgermane preparation; aryl halide preparation; Chemoselectivity; Modular Couplings; Organogermanes; Palladium(I) Dimers; Polyarenes.

Herein, a complementary modular coupling approach to the widely employed Suzuki coupling strategy of boron containing precursors, which relied on organogermane containing building blocks as key orthogonal functionality and an electrophilic (rather than nucleophilic) unmasking event paired with air-stable PdI dimer based bond construction was disclosed. This allowed to significantly shorten the reaction times for the iterative coupling steps and/or to close gaps in the accessible compound space, enabling straightforward access also to iodinated compounds

Angewandte Chemie, International Edition published new progress about Condensation reaction. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Safety of 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Laufersweiler, Michael C. published the artcileCorrelation of chemical structure with reproductive and developmental toxicity as it relates to the use of the threshold of toxicological concern, Formula: C11H12O3, the main research area is structure toxicity correlation reproduction development threshold toxicol.

In the absence of toxicol. data on a chem., the threshold of toxicol. concern (TTC) approach provides a system to estimate a conservative exposure below which there is a low probability of risk for adverse health effects. The original toxicol. dataset underlying the TTC was based on NOELs from repeat dose studies. Subsequently there have been several efforts to assess whether or not these limits are also protective for reproductive/developmental effects. This work expands the database of chems. with reproductive and developmental data, presents these data in a comprehensive and transparent format and groups the chems. according to the TTC “”Cramer Class”” rules. Distributions of NOAELs from each of these classes were used to assess whether the previously proposed TTC values based on repeat dose data are protective for reproductive/developmental toxicity endpoints as well. The present anal. indicates that, for each Cramer Class, the reproductive and developmental endpoints would be protected at the corresponding general TTC tiers derived by .

Regulatory Toxicology and Pharmacology published new progress about C28-34 fatty acids Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Formula: C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ooi, Teng Sin published the artcileVolatile organic compounds and sensory profile of dark chocolates made with cocoa beans fermented with Pichia kudriavzevii and Hanseniaspora thailandica, Synthetic Route of 21834-92-4, the main research area is volatile organic compound dark chocolate cocoa bean Pichia Hanseniaspora; Chocolate; Cocoa beans; Sensory; Volatile organic compounds; Yeast starter.

Volatile organic compounds (VOCs) are important to determine the aroma and sensory perception of cocoa. Starter cultures can modulate the volatile profile of cocoa beans during fermentation This study aimed to determine the VOCs and sensory of chocolates produced using cocoa beans fermented with yeast starters (Pichia kudriavzevii (MH979681), Hanseniaspora thailandica (MH979675) and the mixture of the two yeasts (Mix)). The VOCs of chocolates were determined by Head-Space Solid Phase Microextraction followed by Gas Chromatog.-Mass Spectrophotometry. Sensory anal. was determined by using trained panels. VOCs profiles of chocolates produced using beans fermented with HT, PK or Mix were noticeably different from Ghana and control chocolates (no starter). The addition of yeast starters during cocoa fermentation produced chocolates that were preferred by trained panels. Bitterness and astringency were the more intense flavor attributes in chocolates produced using cocoa beans added with yeast starters. The chocolate produced using cocoa beans fermented with PK was the most acidic; whereas chocolate produced using beans fermented with Mix had the sweetest taste. The addition of PK or HT is helpful in producing chocolate with a distinct flavor.

Journal of Food Science and Technology (New Delhi, India) published new progress about Alcohols Role: BSU (Biological Study, Unclassified), FFD (Food or Feed Use), BIOL (Biological Study), USES (Uses). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Synthetic Route of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ji, Xiang published the artcileSynthesis of 1,2-Dihydroisoquinolines by a Modified Pomeranz-Fritsch Cyclization, SDS of cas: 86-51-1, the main research area is trifluoromethanesulfonamide trimethylsilyl triflate regioselective Pomeranz Fritsch cyclization; dihydroisoquinoline preparation.

Isoquinolines (IQs) and their derivatives are present in many natural products and biol. active small mols. Herein, we report a modified procedure for the classical Pomeranz-Fritsch protocol, which expands the scope of 1,2-dihydroisoquinoline (DHIQ) products. 1,2-DHIQs are an attractive branch point for the synthesis of IQs, but because of their innate reactivity, they have remained difficult to prepare We demonstrate that the Fujioka/Kita conditions, combining trimethylsilyl triflate (TMSOTf) and an amine base, activate dimethylacetals required for Pomeranz-Fritsch cyclization under sufficiently mild conditions to prepare a broad range of 1,2-DHIQ products. We also demonstrate the synthetic value of these DHIQs by further functionalization to either reduced tetrahydroisoquinoline (THIQ) or fully aromatized IQ natural products.

Journal of Organic Chemistry published new progress about Pomeranz-Fritsch cyclization (regioselective). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, SDS of cas: 86-51-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Eisenreich, Fabian published the artcileDirect C-H Trifluoromethylation of (Hetero)Arenes in Water Enabled by Organic Photoredox-Active Amphiphilic Nanoparticles, Formula: C8H10O2, the main research area is amphiphilic polymer catalyst preparation recyclability; arene togni reagent polymer catalyst photochem regioselective trifluoromethylation; trifluoromethyl arene preparation green chem; enzyme mimics; green chemistry; nanoparticles; photoredox catalysis; trifluoromethylation.

It was shown that trifluoromethyl groups can be readily installed into a broad range of organic compounds by using water as the reaction medium and light as the energy source. To bypass solubility obstacles, robust water-soluble polymeric nanoparticles that accommodate reagents and photocatalysts within their hydrophobic interior under high local concns was developed. By taking advantage of the high excited state reduction potential of N-phenylphenothiazine (PTH) through UV light illumination, the direct C-H trifluoromethylation of a wide array of small organic mols. was achieved selectively with high substrate conversion. Key to the approach was slowing down the production of CF3 radicals during the chem. process by reducing the catalyst loading as well as the light intensity, thereby improving effectiveness and selectivity of this aqueous photocatalytic method. Furthermore, the catalyst system showed excellent recyclability and can be fueled by sunlight. The method proposed here is versatile, widely applicable, energy efficient, and attractive for late-stage introduction of trifluoromethyl groups into biol. active mols.

Chemistry – A European Journal published new progress about Green chemistry. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Dam, Jean published the artcileCeric Ammonium Sulfate (CAS) Mediated Oxidations of Benzophenones Possessing a Phenolic Substituent for the Synthesis of Xanthones and Related Products, Related Products of isoquinoline, the main research area is xanthone preparation ceric ammonium sulfate oxidation phenolic benzophenone.

Work previously published by our group described novel methodol. for the synthesis of xanthones and related products from phenolic benzophenones in a reaction mediated by ceric ammonium sulfate (CAS). In this paper we further explore this novel reaction by subjecting an addnl. set of phenolic benzophenones to CAS to afford a range of compounds, including xanthones, 9H-xanthen-2,9(4aH)-diones, 3H-spiro[benzofuran-2,1′-cyclohexa[2,5]diene]-3,4′-diones, and biaryl compounds A comparison of these reactions with the more commonly used oxidant ceric ammonium nitrate (CAN) was also conducted. Based on these results, greater insight into the reaction mechanism has been gained. In addition, the conversion of the synthesized xanthen-2,9(4aH)-diones to xanthones by treatment with sodium dithionite is described.

Journal of Organic Chemistry published new progress about Biaryls Role: SPN (Synthetic Preparation), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem