945531-77-1Relevant articles and documents
Cu-Catalyzed Synthesis of Benzoxazole with Phenol and Cyclic Oxime
Wang, Zheng-Hai,Wang, Dong-Hui
, p. 782 - 785 (2022/01/20)
A Cu-catalyzed straightforward synthesis of benzoxazoles from free phenols and cyclic oxime esters is reported. The mild reaction conditions tolerate various electron-withdrawing and electron-donating functional groups on both substrates, affording benzoxazoles in moderate to good yields. With this protocol, large-scale syntheses of Ezutromid and Flunoxaprofe in one or two steps are demonstrated. A catalytic mechanism, which includes Cu-catalyzed amination via inner-sphere electron transfer and consequent annulation, is proposed.
Multicomponent Reductive Cross-Coupling of an Inorganic Sulfur Dioxide Surrogate: Straightforward Construction of Diversely Functionalized Sulfones
Meng, Yingying,Wang, Ming,Jiang, Xuefeng
supporting information, p. 1346 - 1353 (2019/12/11)
Conventionally, sulfones are prepared by oxidation of sulfides with strong oxidants. Now, a multicomponent reductive cross-coupling involving an inorganic salt (sodium metabisulfite) for the straightforward construction of sulfones is disclosed. Both intramolecular and intermolecular reductive cross-couplings were comprehensively explored, and diverse sulfones were accessible from the corresponding alkyl and aryl halides. Intramolecular cyclic sulfones were systematically obtained from five- to twelve-membered rings. Naturally occurring aliphatic systems, such as steroids, saccharides, and amino acids, were highly compatible with the SO2-insertion reductive cross-coupling. Four clinically applied drug molecules, which include multiple heteroatoms and functional groups with active hydrogens, were successfully prepared via a late-stage SO2 insertion. Mechanistic studies show that alkyl radicals and sulfonyl radicals were both involved as intermediates in this transformation.
Sulfoxide and sulfone compounds, as well as selective synthesis method and application thereof
-
Paragraph 0049-0052; 0142-0145, (2019/12/02)
The invention discloses a method for selectively synthesizing a sulfoxide compound shown as a formula (II) and a sulfone compound shown as a formula (III). In a reaction solvent, thioether (I) is usedas a reaction raw material and oxygen as an oxidation reagent, under the catalytic action of visible light and a photosensitive reagent; under the assistance of an additive, when a large-polarity proton-containing additive such as an acid and an alcohol or a solvent or an additive with excellent electron donating ability is used, a sulfoxide compound (II) is selectively generated; and when a small-polarity aprotic additive or a solvent is used, a sulfone compound (III) is selectively generated. The synthesis method has the advantages of easily available and cheap raw materials, simple reaction operation, mild reaction conditions, high yield and excellent functional group tolerance. According to the invention, synthesis and modification of some medicines are realized, and an efficient method for selectively constructing sulfoxide and sulfone compounds is provided for medicinal chemistry research.
Aryl alkyl sulfone compound and reducing coupling method for constructing sulfone compounds
-
Paragraph 0382-0386, (2019/12/25)
The invention discloses an aryl alkyl sulfone compound shown as a formula (1) and a synthetic method thereof. The aryl alkyl sulfone compound is prepared by taking an aromatic iodide, an inorganic sulfur reagent and an alkyl bromide as reaction raw materials to carry out reacting in a solvent under action of alkali, a catalyst, a ligand, a reducing agent and an additive. According to the invention, an inorganic sulfur reagent is used as a sulfur source to construct the aryl alkyl sulfone compound in one step under catalysis and reduction conditions, so that the defect in synthesizing the arylalkyl sulfone compound by conventional oxidation of thioether is avoided. The aryl alkyl sulfone compound developed by the invention can be used for synthesizing aryl alkyl sulfone medicines.
Selective Late-Stage Oxygenation of Sulfides with Ground-State Oxygen by Uranyl Photocatalysis
Li, Yiming,Rizvi, S. Aal-e-Ali,Hu, Deqing,Sun, Danwen,Gao, Anhui,Zhou, Yubo,Li, Jia,Jiang, Xuefeng
, p. 13499 - 13506 (2019/08/21)
Oxygenation is a fundamental transformation in synthesis. Herein, we describe the selective late-stage oxygenation of sulfur-containing complex molecules with ground-state oxygen under ambient conditions. The high oxidation potential of the active uranyl cation (UO22+) enabled the efficient synthesis of sulfones. The ligand-to-metal charge transfer process (LMCT) from O 2p to U 5f within the O=U=O group, which generates a UV center and an oxygen radical, is assumed to be affected by the solvent and additives, and can be tuned to promote selective sulfoxidation. This tunable strategy enabled the batch synthesis of 32 pharmaceuticals and analogues by late-stage oxygenation in an atom- and step-efficient manner.
Synthesis process of ezutromid
-
, (2019/11/20)
The invention discloses a synthesis process of ezutromid, and relates to the field of drug synthesis. 4-mercaptophenol and an ethyl halide are taken as raw materials, a compound 2 is prepared, then acompound 3 is prepared through nitration, a compound 4 o
COMPOSITION FOR THE TREATMENT OF DUCHENNE MUSCULAR DYSTROPHY
-
, (2017/11/03)
Disclosed are amorphous solid dispersions (ASDs) comprising the compound 5-(ethylsulfonyl)-2-(naphthalen-2-yl)benzo[d]oxazole (ezutromid) and a polymer. The ASDs find application in the treatment or prophylaxis of Duchenne muscular dystrophy and Becker muscular dystrophy.
Discovery of 2-arylbenzoxazoles as upregulators of utrophin production for the treatment of duchenne muscular dystrophy
Chancellor, Daniel R.,Davies, Kay E.,De Moor, Olivier,Dorgan, Colin R.,Johnson, Peter D.,Lambert, Adam G.,Lawrence, Daniel,Lecci, Cristina,Maillol, Carole,Middleton, Penny J.,Nugent, Gary,Poignant, Séverine D.,Potter, Allyson C.,Price, Paul D.,Pye, Richard J.,Storer, Richard,Tinsley, Jonathon M.,Van Well, Renate,Vickers, Richard,Vile, Julia,Wilkes, Fraser J.,Wilson, Francis X.,Wren, Stephen P.,Wynne, Graham M.
experimental part, p. 3241 - 3250 (2011/07/06)
Figure Presented. A series of novel 2-arylbenzoxazoles that upregulate the production of utrophin in murine H2K cells, as assessed using a luciferase reporter linked assay, have been identified. This compound class appears to hold considerable promise as a potential treatment for Duchenne muscular dystrophy. Following the delineation of structure-activity relationships in the series, a number of potent upregulators were identified, and preliminary ADME evaluation is described. These studies have resulted in the identification of 1, a compound that has been progressed to clinical trials.
TREATMENT OF DUCHENNE MUSCULAR DYSTROPHY
-
Page/Page column 6, (2009/03/07)
Provided are polymorphic forms of a compound useful in the treatment of Duchenne muscular dystrophy.
TREATMENT OF DUCHENNE MUSCULAR DYSTROPHY
-
Page/Page column 15-17, (2009/04/25)
Provided are polymorphic forms of a compound useful in the treatment of Duchenne muscular dystrophy.
