111185-65-0

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• 87-13-8 diethyl 2-ethoxymethylenemalonate 
• 589-16-2 4-aminoethylbenzene 
• 111186-10-8 2-(((4-ethylphenyl)amino)methylene)diethyl malonate 

Relevant academic research and scientific papers

Conjugate Addition Routes to 2-Alkyl-2,3-dihydroquinolin-4(1H)-ones and 2-Alkyl-4-hydroxy-1,2-dihydroquinoline-3-carboxylates

Under CuBr·SMe2/PPh3 catalysis (5/10 mol-%) RMgCl (R = Me, Et, nPr, CH=CH2, nBu, iBu, nC5H11, cC6H11, Bn, CH2Bn, nC11H23) readily (–78 °C) undergo 1,4-addition to Cbz or Boc protected quinolin-4(1H)-ones to provide 2-alkyl-2,3-dihydroquinolin-4(1H)-ones (14 examples, 54–99 % yield). Asymmetric versions require AlEt3 to Boc-protected ethyl 6-substituted 4(1H)-quinolone-3-carboxylates (6-R group = all halogens, n/i/t-alkyls, CF3) and provide 61–91 % yield, 30–86 % ee; any halogen, Me, or CF3 provide the highest stereoselectivities (76–86 % ee). Additions of AlMe3 or Al(nC8H17)3 provide ≈ 45 and ≈ 75 % ee on addition to the parent (6-R = H). Ligand (S)-(BINOL)P–N(CHPh2)(cC6H11) provides the highest ee values engendering addition to the Si face of the 4(1H)-quinolone-3-carboxylate. Allylation and deprotection of a representative 1,4-addition product example confirm the facial selectivity (X-ray crystallography).

Green efficient synthesis method of quinolone compound

The invention discloses a green efficient synthesis method of a quinolone compound. The method is as follows: Step 1, a dicarbonyl compound, triethyl orthoformate and an aniline compound react in theabsence of a solvent and a catalyst to obtain an enamine ester intermediate; and Step 2, the enamine ester intermediate is subjected to an intramolecular cyclization reaction under the action of a cyclization reagent diphenyl ether to obtain a quinolone parent ring compound. The purity of the product reaches up to 98.8%. the synthesis method of the invention has the following main beneficial effects: 1, the reaction in the Step 1 is efficient, and no catalyst or solvent is used so as to avoid generation of the three wastes and the yield is high; 2, the process in the step 2 is green, the cyclization reagent can be recycled and reused; and 3, the process is simple, the steps 1 and 2 can be carried out in the same reactor, and the quinolone compound is obtained after reaction and filtration.

PHARMACEUTICAL COMPOSITION AND APPLICATION REPLACING QUINOLONE DERIVATIVE, PHARMACEUTICAL ACCEPTABLE SALT, OR STEREOISOMER

Provided are a substituted quinolone derivative as shown by formula (I), or a pharmaceutically acceptable salt and a prodrug molecule thereof, and a pharmaceutical composition thereof, as well as the use of same in preparing drugs for the prevention and treatment of a tumor. The quinolone derivative, salt, prodrug molecule, and pharmaceutical composition thereof can be used as a protein kinase inhibitor, which is effective in inhibiting the activity of AXL protein kinase, and is capable of inhibiting the proliferation, migration and invasion of various tumor cells; and can be used in the preparation of anti-tumor drugs, especially drugs for treating hyperproliferative diseases such as a tumor in human beings and other mammals.

Synthesis and biological evaluation of 4-oxoquinoline-3-carboxamides derivatives as potent anti-fibrosis agents

Thirty-one 4-oxoquinoline-3-carboxamides derivatives were synthesized and evaluated for their anti-fibrotic activities by the inhibition of TGF-β1-induced total collagen accumulation and anti-inflammatory activities by the inhibition of LPS-stimulated TNF-α production. Among them, three compounds (10a, 10l and 11g) exhibited potent inhibitory effects on both TGF-β1-induced total collagen accumulation and LPS-stimulated TNF-α production. Furthermore, oral administrations of 10l at a dose of 20 mg/kg/day for 4 weeks effectively alleviated lung inflammation and injury, and decreased lung collagen accumulation in bleomycin-induced pulmonary fibrosis model. Histopathological evaluation of lung tissue confirmed 10l as a potential, orally active agent for the treatment of pulmonary fibrosis.

Use of 2-[18F]fluoroethylazide for the Staudinger ligation - Preparation and characterisation of GABAA receptor binding 4-quinolones

The labelling reagent 2-[18F]fluoroethylazide was used in a traceless Staudinger ligation. This reaction was employed to obtain the GABAA receptor binding 6-benzyl-4-oxo-1,4-dihydro-quinoline-3- carboxylic acid (2-[18F]flu

IMAGING AGENTS

The invention relates to compounds of formula (I), or a salt or solvate thereof which comprise a detectable label. The compounds have use as radioligands for the GABAA receptor.

4-Quinolone derivatives: High-affinity ligands at the benzodiazepine site of brain GABAA receptors. Synthesis, pharmacology, and pharmacophore modeling

The 3-ethoxycarbonyl-4-quinolone compound 1 has previously been identified via a database search as an interesting lead compound for ligand binding at the benzodiazepine site of GABAA receptors (Kahnberg et al. J. Mol. Graphics Modelling 2004, 23, 253-261). Pharmacophore-guided optimization of this lead compound yielded a number of high-affinity ligands for the benzodiazepine site including compounds 20 and 23-25 displaying sub-nanomolar affinities. A few of the compounds have been tested on the α1β 2γ2S and α3β 2γ2S GABAA receptor subtypes, and two of the compounds (5 and 19) display selectivity for α1-versus α3-containing receptors by a factor of 22 and 27, respectively. This selectivity for α1β2γ2S is in the same range as that for the well-known α1 subunit selective compound zolpidem.

4(1H)-quinolone derivatives

Quinolone derivatives having a quinolone structure: STR1 where Yo is O or S are disclosed, which are useful as cardiotonic agents. Typical examples of the quinolone derivatives include: 6,7-dimethoxy-4 (1H) quinolone (compound 6) and 5-hydroxy-6-methoxy-4(1H) quinolone (compound 1) as typical compounds of the formulae[I] and [I'], respectively, shown in the specification.