Tag: 100-200

Monroe, Bruce M. published an article in 1977, the title of the article was Quenching of singlet oxygen by aliphatic amines.Synthetic Route of 2160-93-2 And the article contains the following content:

Rate constants for the quenching of singlet O (1O2) for 22 aliphatic amines were measured by following inhibition of the self-sensitized photooxidation of rubrene in CHCl3. A correlation of quenching rate with amine ionization potential was found for amines with unbranched alkyl groups. However, substitution of the C α to the N reduces the quenching rate from that predicted by the ionization potential, indicating that 1O2 quenching is sensitive to steric effects. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).Synthetic Route of 2160-93-2

The Article related to singlet oxygen quenching amine, Physical Organic Chemistry: Photo- and Irradiation-Induced Reactions, Free Radical-Induced Reactions, Free Radical Reactions and other aspects.Synthetic Route of 2160-93-2

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Lin, Yi-Jyun; Wu, Yao-Peng; Thul, Mayur; Hung, Ming-Wei; Chou, Shih-Huan; Chen, Wen-Tin; Lin, Wesley; Lin, Michelle; Reddy, Daggula Mallikarjuna; Wu, Hsin-Ru; Ho, Wen-Yueh; Luo, Shun-Yuan published an article in 2020, the title of the article was Tunable aryl imidazolium recyclable ionic liquid with dual Bronsted-Lewis acid as green catalyst for Friedel-Crafts acylation and thioesterification.Synthetic Route of 143-10-2 And the article contains the following content:

Unique tunable aryl imidazolium ionic liquids I (R = H, MeO, Me, NO2) successfully catalyzed Friedel-Crafts acylation and thioesterification in sealed tubes. These reactions can form a C-C bond and a C-S bond with high atom economy. Ionic liquids exhibited high activity and catalyzed essential reactions with good to excellent yields while retaining their catalytic activities for recycling. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Synthetic Route of 143-10-2

The Article related to aryl imidazolium recyclable green catalyst friedel crafts acylation thioesterification, friedel–crafts acylation, ionic liquids, recyclable, thioesterification, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Ketones and Derivatives, Including Quinones and Sulfur Analogs and other aspects.Synthetic Route of 143-10-2

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On February 7, 2018, Perinu, Cristina; Bernhardsen, Ida M.; Pinto, Diego D. D.; Knuutila, Hanna K.; Jens, Klaus-J. published an article.COA of Formula: C8H19NO2 The title of the article was NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO2: Influence of pKa and Reaction Mechanisms. And the article contained the following:

The diamine 3-(methylamino)propylamine (MAPA) and eight tertiary amines were studied as single and blended aqueous CO2 absorbents at different concentrations and ratios to investigate their reaction mechanisms. After absorption (40 °C) and desorption (80 °C) experiments, quant. 13C NMR experiments were performed on each liquid sample. After absorption, the following CO2-derived species were identified and quantified: (bi)carbonate in each amine system, primary and secondary MAPA carbamate and MAPA dicarbamate in MAPA systems, and tertiary amine carbonate in tertiary amine systems. Concerning desorption, the main CO2 species removed was (bi)carbonate, followed in the blends by MAPA dicarbamate. Since, after CO2 absorption, the concentration of MAPA dicarbamate was negligible in single MAPA and, in the blends, mainly increased at increasing pKa of the tertiary amines, it is concluded that the tertiary amines increase the availability of MAPA species to react further with CO2. MAPA and tertiary amines appear to influence each other also for the CO2 release. The experimental process involved the reaction of 2,2′-(tert-Butylazanediyl)diethanol(cas: 2160-93-2).COA of Formula: C8H19NO2

The Article related to methylaminopropylamine tertiary amine carbon dioxide carbamate carbonate, Physical Organic Chemistry: Absorption, Emission, Reflection, and Scattering Spectra (Ultraviolet and Visible, Infrared and Fourier Transform Infrared, Raman, Microwave, Photoelectron, Fluorescence, Phosphorescence, etc.) and other aspects.COA of Formula: C8H19NO2

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On April 17, 2015, Liu, Yan-Kai; Li, Zhi-Long; Li, Ji-Yao; Feng, Huan-Xi; Tong, Zhi-Ping published an article.Quality Control of Isochroman-3-ol The title of the article was Open-Close: An Alternative Strategy to α-Functionalization of Lactone via Enamine Catalysis in One Pot under Mild Conditions. And the article contained the following:

An open-close strategy in asym. catalysis is newly developed. With this powerful strategy, lactols are directly applied as potential precursors of lactones in enamine-based asym. Michael reactions providing a facile access to α-functionalized lactones containing two adjacent stereogenic centers as a single diastereomer, e.g. I, in good to excellent yields (up to 99%) and with excellent enantioselectivities (most cases >99%). Moreover, the reaction products are shown to give highly functionalized derivatives by stepwise systematic transformations. The experimental process involved the reaction of Isochroman-3-ol(cas: 42900-89-0).Quality Control of Isochroman-3-ol

The Article related to lactol nitroalkene stereoselective michael reaction enamine catalysis, functionalized lactone stereoselective preparation, Heterocyclic Compounds (One Hetero Atom): Benzopyrans (Including Coumarins, Isocoumarins, Chromones, Benzopyrones, Dibenzopyrans, and Other Arenopyrans) and other aspects.Quality Control of Isochroman-3-ol

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On May 31, 1987, Cottet, F.; Cottier, L.; Descotes, G. published an article.Computed Properties of 42900-89-0 The title of the article was New syntheses of isochromene. And the article contained the following:

Isochromene (I) was synthesized in 3 steps from homophthalic acid (II) as well as from 2-indanone (III). Esterification of II, followed by selective reduction with diisobutylaluminum hydride gave 52% 3-hydroxyisochroman (IV). IV was also obtained by Baeyer-Villiger oxidation of III with m-chloroperbenzoic acid to 3-isochromanone and subsequent reduction with diisobutylaluminum hydride. IV was dehydrated to I by distillation in the presence of KHSO4 in a total yield of 48% from II and 69% from III. The experimental process involved the reaction of Isochroman-3-ol(cas: 42900-89-0).Computed Properties of 42900-89-0

The Article related to isochromene preparation, homophthalate reduction, dehydration isochromanol, isochromanone hydrogenation, Heterocyclic Compounds (One Hetero Atom): Benzopyrans (Including Coumarins, Isocoumarins, Chromones, Benzopyrones, Dibenzopyrans, and Other Arenopyrans) and other aspects.Computed Properties of 42900-89-0

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On May 25, 2016, Chen, Congxi; Tian, Yongjian; Liang, Qiuyan; Bao, Xiaowei published a patent.COA of Formula: C8H8O4 The title of the patent was Preparation method of dracorhodin and its hydrochloride and perchlorate, intermediates. And the patent contained the following:

The title preparation method includes (1) performing Vilsmeier formylation reaction of 1,3,5-trimethoxybenzene (formula SM) and formylating agent (N,N-dimethylformamide or N-methyl-N-phenylformamide) to obtain 2,4,6-trimethoxybenzaldehyde (I); (2) performing Huangminglong reduction reaction with 50-85 wt% hydrazine hydrate and sodium hydroxide or potassium hydroxide in solvent B (ethylene glycol or glycerol monomethyl ether) to obtain 1,3,5-trimethoxy-2-methylbenzene (II); (3) performing Vilsmeier formylation reaction with the formylating agent to obtain 2,4,6-trimethoxy-3-methylbenzaldehyde (III); (4) cracking methoxy of the compound III with demethylation reagent (boron halide, aluminum halide, etc.) in solvent D (1,2-dichloroethane, dichloromethane, etc.) to obtain 2,4,6-trihydroxy-3-methylbenzaldehyde (IV); (5) performing substitution reaction with benzyl halide in solvent E (acetone, DMF, etc.) in presence of alkali E (potassium carbonate, sodium carbonate, etc.) to obtain 4,6-bis(benzyloxy)-2-hydroxy-3-methylbenzaldehyde (formula V); (6) performing substitution reaction with methylation agent (di-Me carbonate or iodomethane) in solvent F (acetone, DMF, etc.) to obtain 4,6-bis(benzyloxy)-2-methoxy-3-methylbenzaldehyde (VI); (7) performing benzyl protecting group removal reaction with hydrogen gas in solvent G (ethanol, methanol, etc.) in presence of noble metal catalyst (5-10 wt% palladium/carbon or palladium hydroxide/carbon) under protection of nitrogen gas to obtain 4,6-dihydroxy-2-methoxy-3-methylbenzaldehyde (VII); (8) performing condensation reaction with acetophenone in presence of acetic acid and hydrogen chloride to obtain dracorhodin hydrochloride (VIII); (9) dissolving in methanol, adding saturated sodium acetate solution, and crystallizing to obtain dracorhodin (X); or (10) reacting dracorhodin hydrochloride with perchloric acid to obtain dracorhodin perchlorate (IX). The preparation method has short process route, readily available raw materials, high product yield, low cost, good process reproducibility, and environment friendliness. The experimental process involved the reaction of 2,4,6-Trihydroxy-3-methylbenzaldehyde(cas: 55743-13-0).COA of Formula: C8H8O4

The Article related to dracorhodin perchlorate preparation, Heterocyclic Compounds (One Hetero Atom): Benzopyrans (Including Coumarins, Isocoumarins, Chromones, Benzopyrones, Dibenzopyrans, and Other Arenopyrans) and other aspects.COA of Formula: C8H8O4

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On March 6, 2008, Vander Griend, Douglas A.; Ogburn, Paul H., Jr.; Millett, Frederick A.; Millett, Frederick C.; Winkle, Derick D.; Byker, Harlan J.; Veldkamp, Brad S. published a patent.Application In Synthesis of 2-Methyl-2-propylpropane-1,3-diol The title of the patent was Ligand exchange thermochromic systems. And the patent contained the following:

Ligand exchange of thermochromic, LETC, systems exhibiting a reversible change in absorbance of electromagnetic radiation as the temperature of the system is reversibly changed are described. The described LETC systems include one or more than one transition metal ion, which experiences thermally induced changes in the nature of the complexation or coordination around the transition metal ion(s) and, thereby, the system changes its ability to absorb electromagnetic radiation as the temperature changes. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Application In Synthesis of 2-Methyl-2-propylpropane-1,3-diol

The Article related to ligand exchange thermochromic system, Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes: Photochromic, Thermochromic, and Electrochromic Imaging Systems and other aspects.Application In Synthesis of 2-Methyl-2-propylpropane-1,3-diol

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On April 30, 2020, Rahman, Mahbubur Md.; Li, Guangchen; Szostak, Michal published an article.Safety of 1-Decanethiol The title of the article was Thioesterification and Selenoesterification of Amides via Selective N-C Cleavage at Room Temperature: N-C(O) to S/Se-C(O) Interconversion. And the article contained the following:

An exceedingly mild method for the direct thioesterification and selenoesterification of amides by selective N-C(O) bond cleavage in the absence of transition metals was reported. Acyclic amides underwent N-C(O) to S/Se-C(O) interconversion to give the corresponding thioesters and selenoesters in excellent yields at room temperature via a tetrahedral intermediate pathway (cf. an acyl metal). The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Safety of 1-Decanethiol

The Article related to amidobenzene thiol selective thioesterification, benzothioate preparation, selenol amidobenzene selective selenoesterification, benzoselenoate preparation, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Phenols, Thiophenols, and Derivatives Including Phenol and Thiophenol Ethers and Esters and other aspects.Safety of 1-Decanethiol

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Luo, Jinyun; Lin, Muze; Wu, Leifang; Cai, Zhihua; He, Lin; Du, Guangfen published an article in 2021, the title of the article was The organocatalytic synthesis of perfluorophenylsulfides via the thiolation of trimethyl(perfluorophenyl)silanes and thiosulfonates.Recommanded Product: 1-Decanethiol And the article contains the following content:

The organic superbase t-Bu-P4-catalyzed direct thiolation of trimethyl(perfluorophenyl)silanes and thiosulfonates was developed. Yields of perfluorophenylsulfides of up to 97% under catalysis of 5 mol% t-Bu-P4 were achieved. This method was shown to provide an efficient way to construct the perfluorophenyl-sulfur bond under mild metal-free reaction conditions. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Recommanded Product: 1-Decanethiol

The Article related to trimethyl perfluorophenyl silane thiosulfonate phosphazene catalyst thiolation green chem, perfluorophenylsulfide preparation, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Phenols, Thiophenols, and Derivatives Including Phenol and Thiophenol Ethers and Esters and other aspects.Recommanded Product: 1-Decanethiol

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Terashima, Kyu; Kawasaki-Takasuka, Tomoko; Yamazaki, Takashi published an article in 2021, the title of the article was Construction of fully substituted carbon centers containing a heteroatom and a CF3 group via in situ generated p-quinone methides.Formula: C10H22S And the article contains the following content:

1,6-Conjugate additions of δ-CF3-δ-substituted p-quinone methides, generated in-situ from silyl ethers I (R1 = Me, n-Pr, i-Pr, Ph, PhCC), have been achieved with a variety of heteronucleophiles under mild conditions, which led to facile and practical construction of the compounds II (X = PhCH2NH, PhNHNH, 1-pyrrolidinyl, 1-imidazolyl, F3CCH2O, PhO, i-PrS, PhS, etc.; R2 = H or TBS) with fully substituted carbon centers including a heteroatom and a CF3 group. In particular, it was revealed that some amines themselves worked for efficient cleavage of the TBS protective group, and addition of a catalytic amount of an appropriate Bronsted acid was found to sometimes improve the progress of the desired process. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Formula: C10H22S

The Article related to phenol trifluoromethyl aminoalkyl thioalkyl preparation, quinone methide generation conjugate addition amine thiol alc, Benzene, Its Derivatives, and Condensed Benzenoid Compounds: Phenols, Thiophenols, and Derivatives Including Phenol and Thiophenol Ethers and Esters and other aspects.Formula: C10H22S

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