- Rational Design, Synthesis, and Biological Activity of N-(1,4-Benzoxazinone)Acetamide Derivatives as Potent Platelet Aggregation Inhibitors
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Inappropriate thrombus formation within blood vessels is the leading cause of mortality in the industrialized world. Platelet aggregation activated by thrombin may have close relationship with thrombosis. Based on our studies on the pharmacophoric role of 1,4-benzoxazine-3(4H)-one for desirable platelet aggregation inhibitory activity, we identified N-(4-ethyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-7-yl)-2-(4-methylpiperazin-1-yl)acetamide (BOAP-AM6) and N-(4-butyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-7-yl)-2-(4-(4-fluorophenyl)piperazin-1-yl)acetamide (BOAP-AM21) as platelet aggregation inhibitors with an IC50 of 8.93 and 8.67 μM, respectively, as potent as the positive control aspirin. A combination of structure–activity relationships studies and molecular modeling revealed that the molecule BOAP-AM6 interacted with the amino acid residue TYR166 and ARG214 in the binding site of GPIIb/IIIa receptor through hydrogen bond and compound BOAP-AM21 acted on the amino acid residue ASN215 and ALA218, both through the same approach as the reported potent molecules 7a and 7b.
- Xiang, Yi,Wang, Xiu-Hua,Yang, Quan,Tan, Jia-Lian,Jang, Hee-Jae,Zuo, Hua,Shin, Dong-Soo
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- Effective Synthesis of 3,4-Diaryl-isoxazole-5-carboxamides and their Antiproliferative Properties
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A simple scalable procedure for the synthesis of 3,4-diaryl-isoxazole-5-carboxamides 6 under mild conditions from readily available material was developed. The targeted compounds 6, structural analogues of heat shock protein inhibitors, were obtained by the rearrangement of intermediate 3,4-diaryl-5-carboxamido-isoxazoline N-oxides 5. In contrast to carboxamido-isoxazoline oxides 5, base-catalyzed recyclization of 3,4-diaryl-5-(ethoxycarbonyl)isoxazoline N-oxides 9c unexpectedly yielded 5-hydroxy-1,2-oxazin-6-ones 17c instead of ethyl 3,4-diaryl-isoxazole-5-carboxylates 10. Crystal and molecular structure of 4-(2,5-dimethoxy-3,4-methylenedioxyphenyl)-5-hydroxy-3-phenyl-6H-1,2-oxazin-6-one 17c was established by single-crystal X-ray diffraction study. In a phenotypic sea urchin embryo assay, carboxamide 6f showed moderate antimitotic antitubulin activity compared to 5-unsubstituted 3,4-diarylisoxazoles 15, which featured strong microtubule destabilizing effect.
- Maksimenko, Anna S.,Kislyi, Victor P.,Chernysheva, Natalia B.,Strelenko, Yuri A.,Zubavichus, Yan V.,Khrustalev, Victor N.,Semenova, Marina N.,Semenov, Victor V.
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p. 4260 - 4270
(2019/07/12)
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- Synthesis and acaricidal activities of scopoletin phenolic ether derivatives: Qsar, molecular docking study and in silico Adme predictions
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Thirty phenolic ether derivatives of scopoletin modified at the 7-hydroxy position were synthesized, and their structures were confirmed by IR,1H-NMR,13C-NMR, MS and elemental analysis. Preliminary acaricidal activities of these compounds against female adults of Tetranychus cinnabarinus (Boisduval) were evaluated using the slide-dip method. The results indicated that some of these compounds exhibit more pronounced acaricidal activity than scopoletin, especially compounds 32, 20, 28, 27 and 8 which exhibited about 8.41-, 7.32-, 7.23-, 6.76-, and 6.65-fold higher acaricidal potency. Compound 32 possessed the the most promising acaricidal activity and exhibited about 1.45-fold higher acaricidal potency against T. cinnabarinus than propargite. Statistically significant 2D-QSAR model supports the observed acaricidal activities and reveals that polarizability (HATS5p) was the most important parameter controlling bioactivity. 3D-QSAR (CoMFA: q2 = 0.802, r2 = 0.993; CoMSIA: q2 = 0.735, r2 = 0.965) results show that bulky substituents at R4, R1, R2 and R5 (C6, C3, C4, and C7) positions, electron positive groups at R5 (C7) position, hydrophobic groups at R1 (C3) and R2 (C4), H-bond donors groups at R1 (C3) and R4 (C6) will increase their acaricidal activity, which provide a good insight into the molecular features relevant to the acaricidal activity for further designing novel acaricidal agents. Molecular docking demonstrates that these selected derivatives display different bide modes with TcPMCA1 from lead compound and they interact with more key amino acid residues than scopoletin. In silico ADME properties of scopoletin and its phenolic ether derivatives were also analyzed and showed potential to develop as good acaricidal candidates.
- Luo, Jinxiang,Lai, Ting,Guo, Tao,Chen, Fei,Zhang, Linli,Ding, Wei,Zhang, Yongqiang
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- 1,3-dimethyl-7-substituted-quinazolinyl-2,4-diones, and synthesis method and application thereof
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The invention discloses 1,3-dimethyl-7-substituted-quinazolinyl-2,4-diones. The structural general formula of the compounds is disclosed in the specification, wherein R1 is hydrogen or ethyl; and R2 is a benzene ring, benzene ring derivative, heterocyclic ring or aliphatic hydrocarbon. Part of compounds have favorable inhibiting activities for Candida albicans, Aspergillus flavus, Torula histolytica and Aspergillus fumigatus. The compounds have obvious inhibiting activities for chitin synthetase, have favorable antibacterial effects, and can be used for preparing drugs for anti-pathogenic microorganisms.
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Paragraph 0056; 0057; 0058; 0059; 0060; 0095; 0096
(2017/07/31)
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- Direct Catalytic Asymmetric Aldol Reaction of an α-Azido Amide
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A direct aldol reaction of an α-azido 7-azaindolinylamide, promoted by a Cu-based cooperative catalyst, is documented. Aromatic aldehydes bearing an ortho substituent exhibited diastereodivergency depending on the nature of the chiral ligands used. Smooth reactions with ynals highlighted the broad substrate scope. A vicinal azido alcohol unit in the product allowed direct access to the corresponding aziridine and facile hydrolysis of the 7-azaindolinylamide moiety furnished enantioenriched β-hydroxy-α-azido carboxylic acid derivatives.
- Weidner, Karin,Sun, Zhongdong,Kumagai, Naoya,Shibasaki, Masakatsu
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supporting information
p. 6236 - 6240
(2015/05/20)
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- The synthesis of 4,7-disubstituted-2H-benzo[b][1,4]-oxazin-3(4H)-ones using Smiles rearrangement and their in vitro evaluation as platelet aggregation inhibitors
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A series of novel benzo[b][1,4]oxazin-3(4H)-one derivatives were synthesized as platelet aggregation inhibitors for structure-activity relationships (SAR) analysis. The synthetic pattern, involved Smiles rearrangement for the preparation of benzoxazine, was proven to be more efficient than the conventional methods. Biological evaluation demonstrated that among all the synthesized compounds, compound 9u (IC50 = 9.20 μM) exhibited the most potent inhibition activity compared with aspirin, the positive control (IC50 = 7.07 μM). Molecular docking revealed that these set of compounds could be the GPIIb/IIIa antagonist for that they could be situated in the binding site of GPIIb/IIIa receptor quite well.
- Xia, Shuai,Liu, Ji-Qiang,Wang, Xiu-Hua,Tian, Ye,Wang, Yu,Wang, Jing-Huan,Fang, Liang,Zuo, Hua
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supporting information
p. 1479 - 1483
(2014/03/21)
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- PREPARATION AND METHOD FOR USE IN THE TREATMENT OF RESPIRATORY DISEASES
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The present disclosure relates to a novel active compound having the formula Ia: solid preparations, uses and methods for the treatment or prevention of respiratory diseases comprising said compound as well as process of preparation thereof.
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Page/Page column 13; 14
(2014/09/29)
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- Synthesis, spectral studies and anti-inflammatory activity of glycolamide esters of niflumic acid as potential prodrugs
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In order to reduce the gastric irritation caused by direct contract mechanism of the carboxylic acid group, a series of glycolamide esters of niflumic (CAS 4394-00-7) (1) have been prepared as biolabile prodrugs by reacting appropriate 2-chloroacetamides with niflumic acid. The required 2-chloroacetamides were obtained by the condensation of chloroacetyl chloride and corresponding amine. Their structures were confirmed by UV, IR and 1H NMR spectra. Selected compounds were evaluated for anti-inflammatory activity in carrageenan induced paw oedema in rats at the doses of 45, 90 and 150 mg/kg b.w. Prodrugs showed comparable anti-inflammatory activity (67.1-79.4%) at 150 mg/kg b.w. with respect to niflumic acid (70.3%) at 45 mg/kg b.w., indicating moderate release of niflumic acid in vivo. The highest activity was observed with diethylamine (4) and pyrrolidine (9) derivatives.
- Gadad, Andanappa K.,Bhat, Shailija,Tegeli, Varsha S.,Redasani, Vivek V.
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p. 817 - 821
(2007/10/03)
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- Bicyclic amide derivatives and their use as muscle relaxants
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Novel compounds of formula (1) together with their salts and solvates have a number of uses in medicine, in particular as central muscle relaxants.
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- Bicyclic amide derivatives and their use as muscle relaxants
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Novel compounds of formula (I) STR1 wherein R1, R2, R3 and R4 are each selected from hydrogen and fluoro and at least one and not more than two is fluoro; R5 is selected from hydrogen and C1 -C4 alkyl; R6 is selected from hydrogen, C1 -C4 ally and hydroxy; or R5 and R6 together with the ring carbon form a carbonyl group; R7 is selected from hydrogen and hydroxy, R8 and R9 are each selected from hydrogen, C1 -C4 alkyl and cyclo(C3 or C4) alkyl or together with the nitrogen form a morpholino group; and X is selected from a bond, methylene and --O-- and is always a bond or --O-- when any of R5, R6 and R7 is other than hydrogen and is always a bond when R5 and R6 together with the ring carbon form a carbonyl group; and their salts and solvates have a number of uses as central muscle relaxants. In particular, treatment of conditions associated with abnormally raised skeletal muscle tone. They are of special value in the relaxation of skeletal muscle in spastic, hypertonic and hyperkinetic conditions.
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- Amide derivatives and their therapeutic use
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Novel carbocyclic amides together with their salts, solvates and physiologically active derivatives which have a number of uses in medicine, in particular as central muscle relaxants, and in the treatment or prophylaxis of anxiety, inflammation, arthritis and pain.
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- An efficient synthesis of 6-formyl-1,2-dihydro-2-oxo-3-pyridinecarboxylic acid and some carbonyl derivatives of it and its 6-acetyl homologue
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Starting with 1,1-dimethoxy-2-propanone (1), 6-formyl-1,2-dihydro-2-oxo-3-pyridinecarboxylic acid (5a) has been prepared in large quantities by a highly efficient, 4-step synthesis. This compound, along with its one carbon homologue, 6-acetyl-1,2-dihydro-2-oxo-3-pyridinecarboxylic acid (5b) has been reacted with several carbonyl derivative forming reagents to provide a series of side chains for β-lactams. Among these carbonyl derivatives are styrylamides which were prepared from Wittig and Horner-Emmons reagents. The preparation of the phosphonium salts and phosphonate esters is also described.
- Sanchez,Mich,Huang
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p. 297 - 303
(2007/10/02)
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