- Heterocyclic compound and application thereof
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The present disclosure relates to a heterocyclic compound represented by general formula I, a pharmaceutically acceptable salt, a stereoisomer, an enantiomer, a diastereoisomer, an atropisomer, an optical isomer, a raceme, a polymorphic substance, a solvate or an isotope labeled compound thereof, a pharmaceutical composition containing the heterocyclic compound, and a pharmaceutical use thereof. The heterocyclic compound disclosed by the invention is an immunomodulator, and particularly relates to an immunomodulator of a compound for activating STING.
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Paragraph 0123-0125
(2021/06/13)
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- Design and synthesis of heteroaromatic-based benzenesulfonamide derivatives as potent inhibitors of H5N1 influenza A virus
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Influenza A virus is an enveloped negative single-stranded RNA virus that causes febrile respiratory infection and represents a clinically challenging threat to human health and even lives worldwide. Even more alarming is the emergence of highly pathogenic avian influenza (HPAI) strains such as H5N1, which possess much higher mortality rate (60%) than seasonal influenza strains in human infection. In this study, a novel series of heteroaromatic-based benzenesulfonamide derivatives were identified as M2 proton channel inhibitors. A systematic investigation of the structure-activity relationships and a molecular docking study demonstrated that the sulfonamide moiety and 2,5-dimethyl-substituted thiophene as the core structure played significant roles in the anti-influenza activity. Among the derivatives, compound 11k exhibited excellent antiviral activity against H5N1 virus with an EC50 value of 0.47 μM and selectivity index of 119.9, which are comparable to those of the reference drug amantadine.
- Yu, Yongshi,Tazeem,Xu, Zhichao,Du, Liaoqi,Jin, Mengyu,Dong, Chune,Zhou, Hai-Bing,Wu, Shuwen
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- A [...] intermediate 5 - chloro - N - (2 - oxirane ylmethyl) -2 - thiophene carboxamide preparation method
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The invention provides a preparation method for a Rivaroxaban intermediate 5-chloro-N-(2-oxiranylmethyl)-2-thiophene methanamide. First, 5-chlorothiophene-2-formic acid and toluene are added into a reaction container, the temperature is risen to 80-85 DEG C slowly, then thionyl chloride is dripped slowly, and the temperature is risen to 95-105 DEG C; the reaction solution is cooled to 50-60 DEG C, equal-temperature reduced pressure distillation is carried out, the solvent is evaporated, and after toluene is added, a toluene solution of 5-chlorothiophene-2-formyl chloride is obtained; then propane is added in the toluene solution of 5-chlorothiophene-2- formyl chloride, then ammonia water is dripped under an ice-bath condition, and 5-chlorothiophene-2-methanamide is obtained; then 5-chlorothiophene-2-methanamide and potassium carbonate are added in a reaction container, then epoxy chloropropane is added, and after heating and stirring, 5-chloro-N-(2-oxiranylmethyl)-2-thiophene methanamide is obtained. In the technology route, reaction conditions are optimized, the reaction is mild, operation is simple, and the yield is high.
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Paragraph 0028-0031
(2018/11/22)
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- The preparation method of the [...] (by machine translation)
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The invention provides a method for preparing [...], using 4 - (4 - aminophenyl) - 3 - morpholone and 5 - chloro - N - (2 - ethylene oxide-based methyl) - 2 - thiophene carboxamide reaction to obtain 5 - [...] - 2 - {(R)- 2 - hydroxy - 3 - [4 - (3 - oxo - 4 - morpholinyl) phenyl amino] - propyl} amide, then adding N, N' - carbonyl di-imidazole, 4 - dimethylamino pyridine, begins to stir, heating reaction to obtain the - 5 - chloro - N - (( (5 S) - 2 - oxo - 3 - (4 - (3 - oxo-morpholine - 4 - yl) phenyl) - 1, 3 - Oxacillin - 5 - yl) methyl) thiophene - 2 - carboxamide. The technique of the invention route after the condition is optimized, mild reaction, high yield. (by machine translation)
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Paragraph 0049; 0050; 0051; 0052
(2018/11/22)
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- Rivaroxaban preparation method
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The invention discloses a rivaroxaban preparation method and belongs to the field of medical chemistry. The method comprises the steps: firstly reacting N-(4-aminophenyl)-3-morpholinone with Boc anhydride or benzylcarbonyl chloride or other ester to generate N-(4-alkoxycarbonyl aminophenyl)-3-morpholinone intermediate I; reacting 5-chlorothiophene-2-methanamide with epoxy chloropropane to generate N-(1,2-glycidyl)-5-chlorothiophene-2-methanamide intermediate II. The intermediate I and the intermediate II are open loop-cyclization condensed under alkali condition to be directly prepared into rivaroxaban. The method has short synthesizing path, moderate condition, convenience to operate, high yield, stable product quality and easiness in achieving industrial production. The structural formula is shown in the specification.
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Paragraph 0029; 0039; 0043
(2017/09/26)
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- Molecular recognition at the active site of factor Xa: Cation-π Interactions, stacking on planar peptide surfaces, and replacement of structural water
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Factor Xa, a serine protease from the blood coagulation cascade, is an ideal enzyme for molecular recognition studies, as its active site is highly shape-persistent and features distinct, concave sub-pockets. We developed a family of non-peptidic, small-molecule inhibitors with a central tricyclic core orienting a neutral heterocyclic substituent into the S1 pocket and a quaternary ammonium ion into the aromatic box in the S4 pocket. The substituents were systematically varied to investigate cation-π interactions in the S4 pocket, optimal heterocyclic stacking on the flat peptide walls lining the S1 pocket, and potential water replacements in both the S1 and the S4 pockets. Structure-activity relationships were established to reveal and quantify contributions to the binding free enthalpy, resulting from single-atom replacements or positional changes in the ligands. A series of high-affinity ligands with inhibitory constants down to Ki=2nM were obtained and their proposed binding geometries confirmed by X-ray co-crystal structures of protein-ligand complexes. Factor Xa is an ideal enzyme to undertake molecular recognition studies at atomic level resolution as its active site is completely conserved in complexes with designed ligands. Cation-π interactions, water replacements, and stacking interactions with flat peptide fragments were investigated, revealing large changes in binding affinity resulting from single-atom mutations or positional shifts of heteroatoms in the ligands. Copyright
- Salonen, Laura M.,Holland, Mareike C.,Kaib, Philip S. J.,Haap, Wolfgang,Benz, J?rg,Mary, Jean-Luc,Kuster, Olivier,Schweizer, W. Bernd,Banner, David W.,Diederich, Fran?ois
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p. 213 - 222
(2012/03/09)
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- METHODS OF PREPARING FACTOR XA INHIBITORS AND SALTS THEREOF
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The present invention provides for methods of preparing compounds of Formula I or a salt of the compound or a hydrate of the compound or salt thereof that are factor Xa inhibitors. Specifically the present invention provides a method of preparing the comp
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Page/Page column 18
(2011/07/06)
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- CRYSTALLINE FORMS OF A FACTOR XA INHIBITOR
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The present invention provides crystalline forms of a mesylate salt of the compound 5-chloro-N-((1-(4-(2-oxopyridin-1(2H)-yl)phenyl)-1H-imidazol-4-yl)methyl)thiophene-2-carboxamide and pharmaceutical compositions and methods thereof.
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Page/Page column 9
(2011/07/08)
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- SALTS AND CRYSTALLINE FORMS OF A FACTOR XA INHIBITOR
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The present invention provides salts and crystalline forms of the compound 5-chloro-N-((1-(4-(2-oxopyridin-1(2H)-yl)phenyl)-1H-imidazol-4-yl)methyl)thiophene-2-carboxamide, and pharmaceutical compositions and method of use thereof.
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Page/Page column 31
(2011/08/03)
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- Novel and direct transformation of methyl ketones or carbinols to primary amides by employing aqueous ammonia
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Figur Presented A novel and direct transformation of aryl, heteroaryl, vinyl, or ethynyl methyl ketones or carbinols to corresponding primary amides has been developed. An iodine-NH3·H2O system was proven to be efficient for this reaction and afforded the expected products with good yields in aqueous media. A tandem Lieben-Haller-Bauer reaction mechanism was involved in this type of reaction and is proposed for the first time.
- Cao, Liping,Ding, Jiaoyang,Gao, Meng,Wang, Zihua,Li, Juan,Wu, Anxin
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supporting information; experimental part
p. 3810 - 3813
(2009/12/06)
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