394-28-5Relevant articles and documents
Light and oxygen-enabled sodium trifluoromethanesulfinate-mediated selective oxidation of C-H bonds
Fu, Hua,Liu, Can,Liu, Yong,Yang, Haijun,Zhu, Xianjin
supporting information, p. 4357 - 4363 (2020/07/14)
Visible light-induced organic reactions are important chemical transformations in organic chemistry, and their efficiency highly depends on suitable photocatalysts. However, the commonly used photocatalysts are precious transition-metal complexes and elaborate organic dyes, which hamper large-scale production due to high cost. Here, for the first time, we report a novel strategy: light and oxygen-enabled sodium trifluoromethanesulfinate-mediated selective oxidation of C-H bonds, allowing high-value-added aromatic ketones and carboxylic acids to be easily prepared in high-to-excellent yields using readily available alkyl arenes, methyl arenes and aldehydes as materials. The mechanistic investigations showed that the treatment of inexpensive and readily available sodium trifluoromethanesulfinate with oxygen under irradiation of light could in situ form a pentacoordinate sulfide intermediate as an efficient photosensitizer. The method represents a highly efficient, economical and environmentally friendly strategy, and the light and oxygen-enabled sodium trifluoromethanesulfinate photocatalytic system represents a breakthrough in photochemistry. This journal is
Catalytic Fehling's Reaction: An Efficient Aerobic Oxidation of Aldehyde Catalyzed by Copper in Water
Liu, Mingxin,Li, Chao-Jun
supporting information, p. 10806 - 10810 (2016/09/03)
The first example of homogeneous copper-catalyzed aerobic oxidation of aldehydes is reported. This method utilizes atmospheric oxygen as the sole oxidant, proceeds under extremely mild aqueous conditions, and covers a wide range of various functionalized aldehydes. Chromatography is generally not necessary for product purification.
TEMPO-mediated oxidation of primary alcohols to aldehydes under visible light and air
Liu, Dongwang,Zhou, Hongxia,Gu, Xiangyong,Shen, Xiaoqin,Li, Pixu
supporting information, p. 117 - 122 (2014/03/21)
A homogeneous visible light photoredox TEMPO-mediated selective oxidation of primary alcohols to the corresponding carbonyl compounds was developed using molecular oxygen from air as the terminal oxidant. Ru(bpy)3(PF 6)2 (bpy: bipyridyl) and Ir(dtb-bpy)(ppy) 2(PF6) (dtb-bpy: 4,4′-di-tert-butyl-2,2′- bipyridyl; ppy: 2-phenylpyridine) were used as the sensitizers. A homogeneous visible light photoredox TEMPO-mediated selective oxidation of primary alcohols to the corresponding carbonyl compounds was developed. Molecular oxygen from air was the terminal oxidant. Copyright
INHIBITORS OF STEAROYL-COA DESATURASE
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, (2009/06/27)
Provided herein are compounds of the formula (I): as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of diseases such as, for example, obesity.
Processes for preparing 6-alkyl-5-arylsulfonyl-dihydrophenanthridines
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Page/Page column 9, (2010/02/15)
Synthetic methods are provided for production of compounds of the formula: where R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 and R14 are as defined in the specification.
2- ( (2, 3-DIHYDROXYPROPYL) AMINOMETHYL) CHROMANE DERIVATIVES FOR USE AS BETA-3 ADRENORECEPTOR AGONISTS IN THE TREATMENT OF UROLOGICAL AND INFLAMMATORY DISORDERS
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Page/Page column 46, (2010/02/12)
This invention relates to chroman derivatives of formula (I) and salts thereof which are useful as active ingredients of pharmaceutical preparations. The chroman derivatives of the present invention have an excellent activity as BETA 3 antagonists and are useful for the prophylaxis and treatment of diseases associated with BETA 3 activity, in particular for the treatment of urological disorder or disease, such as detrusor overactivity (overactive bladder), urinary incontinence, neurogenic detrusor overactivity (detrusor hyperflexia), idiopathic detrusor overactivity (detrusor instability), benign prostatic hyperplasia, and lower urinary tract symptoms; and inflammatory disorders, such as asthma and COPD.
Regioselective ortho-lithiation of chloro and bromo substituted fluoroarenes
Mongin, Florence,Schlosser, Manfred
, p. 6551 - 6554 (2007/10/03)
Deprotonation of fluoroarenes carrying chlorine or bromine as additional substituents occurs always at a fluorine adjacent position if accomplished with potassium tert-butoxide activated butyllithium or lithium 2,2,6,6-tetramethylpiperidide.
Cyclic amide derivatives for treating asthma
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, (2008/06/13)
Compounds of formula I STR1 wherein Q1, Q2, Q3, and Q4 have any of the meanings given in the specification, their N-oxides, and their pharmaceutically acceptable salts are nonpeptide antagonists of neurokinin A and useful for the treatment of asthma, etc. Also disclosed are pharmaceutical compositions, processes for preparing the compounds of formula I and intermediates.
Peri Fluoro Steric Effects: Syntheses and Comparative Acid-Catalyzed Isomerization of the 8-, 9-, and 11-Fluoro-1,2,3,4-tetrahydro-7,12-dimethylbenzanthracenes to Exo Methylene Tautomers
Witiak, Donald T.,Goswami, Shyamaprosad,Milo, George E.
, p. 345 - 352 (2007/10/02)
Facile and regiospecific syntheses for 8-, 9-, and 11-fluoro-1,2,3,4-tetrahydro-7,12-dimethylbenzanthracenes (4, 5, and 7) from 5,6,7,8-tetrahydro-1-naphthaldehyde and the respective 2-(2-fluoro-6-iodophenyl)oxazoline 14, 2-(2-bromo-5-fluorophenyl)oxazoline 15, and 2-(3-fluorophenyl)oxazoline 16 are described.Comparative acid-catalyzed isomerization of these polycyclic aromatic hydrocarbons (PAH) to exo methylene tautomers in refluxing benzene is compared to our previously published studies employing the parent hydrocarbon 1 and the 5-, 6-, and 10-fluoro analogues(2, 3, and 6).The peri steric effect of 11-fluoro compound 7- was the most dramatic, providing 7-exo methylene isomer 45 in nearly quantitative yield.Substitution of fluorine at peri positions 6 and 8 afforded product ratios at equilibrium, whereas the 7-exo methylene tautomers (41 and 42) also were thermodynamically favored over the parent anthracene PAH or the respective 12-exo methylene isomers (48 and 49).Like the unsubstituted PAH 1, where fluorine does not occupy a peri position such as in the 9- and 10-fluoro species 5 and 6, no appreciable quantities of exo methylene tautomers were detected.Comparative ΔGo values for isomerization of 6-, 8-, and 11-fluoro isomers revealed that sandwiching the C12-CH3 group between the 11-fluoro and C1-CH2 functions in 7 and removing any possible 7-CH2-F interaction in exo methylene product 45 led to a relative relief in steric interaction of approximately 1 kcal/mol.