Synthesis of spiro-linked quinolinone-pyrrolidine/pyrrolo[1,2-c]thiazole-oxindole/acenaphthalene hybrids via multi-component [3 + 2] cycloaddition
摘要:
The syntheses of novel spiro-linked quinolinone-pyrrolidine/pyrrolo[1,2-c]thiazole-oxindole/acenaphthalene hybrid heterocycles have been achieved through a one-pot three-component [3 + 2] cycloaddition strategy. The reaction proceeded stereoselectively affording these structurally intriguing multi-spiro compounds in excellent yields. (C) 2018 Elsevier Ltd. All rights reserved.
Tetrahydroquinolinones and their use as antagonists of metabotropic glutamate receptors
申请人:Jirgensons Aigars
公开号:US20050197361A1
公开(公告)日:2005-09-08
The invention relates to tetrahydroquinolinone derivatives as well as their pharmaceutially acceptable salts. The invention further relates to a process for the preparation of such compounds. The compounds of the invention are group I mGluR antagonists and are therefore useful for the control and prevention of acute and/or chronic neurological disorders.
Novel 5,6,7,8-tetrahydro-5-quinolines and their use as anti-inflammatory
申请人:Schering, A.G.
公开号:US04117135A1
公开(公告)日:1978-09-26
Pyridine derivatives of the formula ##STR1## wherein R.sub.1 is an alkyl, aliphatic, a cycloalkyl, or a substituted or unsubstituted hydrocarbon aryl and the substituent is halogen, alkoxy or methylenedioxy; R.sub.2 is H or Cl; X is CN, 5-tetrazolyl, or COOH or a carboxylic acid derivative; Y is H, OH, OCOR.sub.7, NH.sub.2, NHCOR.sub.8, R.sub.9, COOH or COOR.sub.10 and R.sub.7, R.sub.8, R.sub.9 and R.sub.10 are alkyl groups of 1-10 carbon atoms; A is methylene or a carbon-to-carbon bond; and R.sub.3 and R.sub.4 are each H or alkyl groups of 1-4 carbon atoms, are useful as anti-inflammatory agents.
An unorthodox metal-free synthesis of dihydro-6<i>H</i>-quinoline-5-ones in ethanol/water using a non-nucleophilic base and their cytotoxic studies on human cancer cell line
DBU-catalysed metal-free dominoreaction strategy has been developed for the facilesynthesis of dihydro-6H-quinoline-5-ones. This protocol employs a very expedient route to the synthesis of pyridine frameworks using β-chloro-α,β-unsaturated aldehydes, 1,3-diketones, and ammonium acetate in ethanol : water (1 : 1) solvent under eco-friendly conditions. Diverse types of acyclic and cyclic β-chloro-α,β-unsaturated
Chemoselective Condensation of 3-Amino-2-cyclohexenones with Cinnamaldehydes: Switchable Synthesis of Dihydroquinolinones and Hexahydroacridinediones
作者:Ling Jiang、Kun He、Weikun Zeng、Zhi Qiao、Xizhong Song、Kaixiu Luo、Jingbo Chen、Jun Lin、Yi Jin
DOI:10.1021/acs.joc.3c00011
日期:2023.5.5
cinnamaldehydes for switchable synthesis of dihydroquinolinones and hexahydroacridinediones was developed. Mechanism analysis showed that the formation of dihydroquinolinones involved trimolecular condensation and oxidative aromatization, while the formation of hexahydroacridinediones involved acid hydrolysis of enaminone and dehydration-aromatization. This strategy provides a convenient way to switch from the
We, herein, describe the synthesis of a series of novel aryl tethered 7,8-dihydroquinolin-5(6H)-ylidenehydrazinecarbothioamides 4a-v, which showed in vitro and in vivo antimycobacterial activity against Mycobacterium tuberculosis (Mtb) H37Rv. The intermediates dihydro-6H-quinolin-5-ones 3a-v were synthesized from beta-enaminones, reacting with cyclochexane-1,3-dione/5,5-dimethylcyclohexane-1,3-dione and ammonium acetate using a modified Bohlmann-Rahtz reaction conditions. They were further reacted with thiosemicarbazide to give the respective hydrazine carbothioamides 4a-v. All the new analogues 4a-v, were characterized by their NMR and mass spectral data analysis. Among the twenty-two compounds screened for in vitro antimycobacterial activity against Mycobacterium tuberculosis H37Rv (ATCC27294), two compounds, 4e and 4j, exhibited the highest inhibition with an MIC of 0.39 mu g/mL. Compounds 4a, 4g, and 4k were found to inhibit Mtb at an MIC of 0.78 mu g/mL. Hydrazinecarbothioamides 4a-k, exhibited enhanced activity than dihydroquinolinones 3a-k. The observed increase in potency provides a clear evidence that hydrazinecarbothioamide is a potential pharmacophore, collectively imparting synergistic effect in enhancing antitubercular activity of the dihydroquinolinone core. The in vivo (Zebra fish) antimycobacterial screening of the in vitro active molecules led to the identification of a hit compound, 4j, with significant activity in the Mtb nutrient starvation model (2.2-fold reduction). Docking studies of 4j showed a hydrogen bond with the P156 residue of the protein.