790240-54-9Relevant academic research and scientific papers
Antitumour polycyclic acridines. Part 1. Synthesis of 7H-pyrido- and 8H-quino-[4,3,2-kl]acridines by Graebe-Ullmann thermolysis of 9-(1,2,3-triazol-1-yl)acridines: Application of differential scanning calorimetry to predict optimum cyclisation conditions
Hagan, Damien J.,Gimenez-Arnau, Elena,Schwalbe, Carl H.,Stevens, Malcolm F. G.
, p. 2739 - 2746 (1997)
The thermal decomposition of a series of acridities substituted in the 9-position with 1,2,3-triazol-1-yl, benzotriazol-1-yl and naphthotriazol-1-yl groups has been studied by differential scanning calorimetry. Whereas the monocyclic triazole 7a shows a discrete melting endotherm followed by a decomposition exotherm corresponding to formation of the 7H-pyrido[4,3,2-kl]acridine 8, in the benzotriazoles 10a-e and naphthotriazole 10f these processes coincide with a single sharp exothermic transition attributed to cyclisation to polycyclic acridities 11a-f, respectively. The optimum conditions for the preparative scale synthesis of polycyclic acridines from triazole precursors utilised boiling diphenyl ether as the decomposition medium. A benzotriazol-1-ylacridine 10e substituted in the peri position with a methyl group behaved anomalously: as well as affording the expected 8H-quino[4,3,2-kl]acridine 11e, cyclisation also led to radical mediated loss of the methyl group to form the unsubstituted 8H-quino[4,3,2-kl]acridine 11a and H-abstraction from the methyl group leading to the benzoazepinoacridine 12. Radical cyclisation of 9-(2-iodoanilino)acridine 16 also gave 8H-quino[4,3,2-kl]acridine 11a. The crystal structure of 11a confirms the 8H tautomer arrangement with intermolecular N8-H...N13 hydrogen bonding and exhibits a polycyclic system that is planar with rms deviation 0.044 A.
Preparation method of acridone
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Paragraph 0020-0033, (2021/09/26)
The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of acridone, wherein acidic ionic liquid is used as a catalyst and a solvent. , The volatile organic solvent such as toluene can be replaced by the advantages of small volatility, and VOCs prevention and treatment problems of an increasingly urgent problem can be solved. The method is environment-friendly and meets the requirements of green chemistry.
Design, synthesis and evaluation of novel 9-arylalkyl-10-methylacridinium derivatives as highly potent FtsZ-targeting antibacterial agents
Song, Di,Zhang, Nan,Zhang, Panpan,Zhang, Na,Chen, Weijin,Zhang, Long,Guo, Ting,Gu, Xiaotong,Ma, Shutao
, (2021/05/10)
With the increasing incidence of antibiotic resistance, new antibacterial agents having novel mechanisms of action hence are in an urgent need to combat infectious diseases caused by multidrug-resistant (MDR) pathogens. Four novel series of substituted 9-arylalkyl-10-methylacridinium derivatives as FtsZ inhibitors were designed, synthesized and evaluated for their antibacterial activities against various Gram-positive and Gram-negative bacteria. The results demonstrated that they exhibited broad-spectrum activities with substantial efficacy against MRSA and VRE, which were superior or comparable to the berberine, sanguinarine, linezolid, ciprofloxacin and vancomycin. In particular, the most promising compound 15f showed rapid bactericidal properties, which avoid the emergence of drug resistance. However, 15f showed no inhibitory effect on Gram-negative bacteria but biofilm formation study gave possible answers. Further target identification and mechanistic studies revealed that 15f functioned as an effective FtsZ inhibitor to alter the dynamics of FtsZ self-polymerization, which resulted in termination of the cell division and caused cell death. Further cytotoxicity and animal studies demonstrated that 15f not only displayed efficacy in a murine model of bacteremia in vivo, but also no significant hemolysis to mammalian cells. Overall, this compound with novel skeleton could serve as an antibacterial lead of FtsZ inhibitor for further evaluation of drug-likeness.
Compound, pharmaceutical composition, medicine and application of compound, pharmaceutical composition and medicine in preparation of antibacterial products
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Paragraph 0069-0071, (2021/07/17)
The invention particularly relates to a compound, a pharmaceutical composition, a medicine and application of the compound, the pharmaceutical composition and the medicine in preparation of antibacterial products. The seeking of a novel antibacterial target and the development of a novel chemical entity have important significance for solving the increasingly severe bacterial drug resistance problem at present, and the design of a compound entity acting on the FtsZ target is expected to be developed to obtain an antibacterial drug which has no influence on a host. The invention provides a 9-aralkyl-10-methylacridine quaternary ammonium salt derivative and a preparation method thereof, and the compound has significant bactericidal and/or bacteriostatic activity on gram-positive bacteria, has a good effect of inhibiting bacterial division protein FtsZ, and can be used for preparing antibacterial products.
Aromatic heterocycle substituted acridine quaternary ammonium salt derivative as well as preparation method and application thereof
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Paragraph 0071-0074, (2021/09/29)
The invention belongs to the technical field of pharmaceutical compounds, relates to an aromatic heterocyclic substituted acridine quaternary ammonium salt derivative and a preparation method and application thereof, and has the structure shown in a formula (I). In-flight R1 A compound selected from the group consisting of aryl and heteroaryl. Substituted aryls. X Is a halogen or benzenesulfonate anion. The invention provides an aromatic heterocyclic substituted acridine quaternary ammonium salt derivative as well as a preparation method and application thereof, and is designed to synthesize an aromatic heterocyclic substituted acridine quaternary ammonium salt derivative through a simplified structure, and is designed to synthesize an aromatic heterocyclic substituted acridine quaternary ammonium salt derivative so as to achieve the unique antibacterial effect by inhibiting the bacteria FtsZ and bacterial biofilm.
Novel series of N-acylhydrazone based on acridone: Synthesis, conformational and theoretical studies
Aarjane, Mohammed,Amine, Amina,Slassi, Siham
, (2020/08/22)
In this work, novel N-acylhydrazone derivatives from acridone have been synthesized by condensation of 9-oxoacridin-10(9H)-yl)acetohydrazide with various aldehyde and ketone. The structures of these novel compounds were elucidated by 1H NMR, 13C NMR, IR and mass spectroscopy. The NMR data shows two conformations (E, trans and E, cis) due to N–C(O) bond rotation, the conformations of synthesized compounds have been investigated by different NMR methods. The rotational barriers around N–C(O) bond for compound 5a was measured in DMSO using dynamic NMR spectroscopy, this result was confirmed by DFT calculations at B3LYP/6–31 G (d) level in DMSO.
Synthesis, antibacterial evaluation and computational studies of new acridone-1,2,3-triazole hybrids
Aarjane, Mohammed,Amine, Amina,Slassi, Siham
, (2021/06/07)
In continuation of our efforts to develop new drugs with antibacterial properties we have synthesized and evaluated new 1,2,3-triazole derivatives from acridone. The synthetic approach was started by the preparation of acridone skeleton through the Ullman condensation of 2-bromobenzoic acid and aniline derivatives. Subsequently, acridone nucleus was functionalized with propargyl bromide. Then, a click reaction of the latter compound and aromatic azides led to the formation of the title compounds in good yields. The synthesized compounds were screened for their in vitro antibacterial activity against one gram-positive bacteria S. aureus and three gram-negative bacteria P. putida, K. pneumoniae and E. coli. Among the synthesized compounds, 2-methyl-10-((1-(o-tolyl)-1H-1,2,3-triazol-4-yl)methyl)acridone (4e) had the most potent inhibitory activity against S. aureus with MIC = 10.1 μg/mL. Then, in silico docking studies were used in order to understand the binding interactions and mode of action of these compounds.
Synthesis and biological evaluation of novel isoxazole derivatives from acridone
Aarjane, Mohammed,Slassi, Siham,Tazi, Bouchra,Amine, Amina
, (2020/12/07)
The present study was carried out in an?attempt to synthesize a new class of potential antibacterial agents. In this context, novel isoxazoles were synthesized and evaluated for their potential antibacterial behavior against four pathogenic bacterial strains. The synthesized compounds exhibited moderate-to-good antibacterial activity against these strains. The highest antibacterial activity was observed against the Escherichia coli strains, particularly for compounds 4a and 4e with phenyl and para-nitrophenyl groups on the isoxazole–acridone skeleton;?they showed promising minimum inhibitory concentration values of 16.88 and 19.01 μg/ml, respectively, compared with the standard drug chloramphenicol (22.41 μg/ml). The synthesized compounds were subjected to in silico docking studies to understand the mode of their interactions with the DNA topoisomerase complex (PDB ID: 3FV5) of E. coli. The molecular docking results showed that compounds 4a–l occupy the active site of DNA topoisomerase (PDB ID: 3FV5), stabilized via hydrogen bonding and hydrophobic interactions, which may be the reason behind their interesting in vitro antibacterial activity.
Synthesis, spectroscopic characterization (FT-IR, NMR) and DFT computational studies of new isoxazoline derived from acridone
Aarjane, Mohammed,Slassi, Siham,Ghaleb, Adib,Amine, Amina
, (2021/01/28)
In this study, a new isoxazoline derived from acridone, 10‐{[3‐(4‐chlorophenyl)‐4,5‐dihydro‐1,2‐oxazol‐5 yl]methyl} acridone (3) was successfully synthesized and characterized by FT-IR, 1H NMR, 13C NMR and HRMS. The preparation of compound (3) was achieved by 1,3-dipolar cycloaddition reaction between 4?chloro-N-hydroxybenzimidoyl chloride and 10-allylacridone using environment friendly methods. In an effort to complete the chemical structure description of the synthetized compound, Density Functional Theory (DFT) was applied using Gaussian09 and Gaussian view5 programs. The theoretical calculations were used as a compliment to the experimental studies. The computing of geometric parameters, optimization energies, frontier molecular orbital energies, Molecular surface electrostatic potential (MESP) and Mulliken charges were calculated using DFT/B3LYP method with 6–31G(d,p) as basis set. The Infrared vibrational frequencies and 1H and 13C NMR chemical shifts were also calculated and their scaled values are in agreement with the experimental results.
Acid-catalyzed oxidative cross-coupling of acridans with silyl diazoenolates and a Rh-catalyzed rearrangement: two-step synthesis of γ-(9-acridanylidene)-β-keto esters
Li, Weiyu,Xu, Hao,Zhou, Lei
supporting information, p. 5649 - 5657 (2021/07/02)
A MsOH-catalyzed oxidative cross-coupling of acridans and silyl diazoenolates and a Rh2(OAc)4-catalyzed rearrangement of the resultant diazo products are described. The reactions provide various γ-(9-acridanylidene)-β-keto esters in good yields, which bear an active α-methylene unit for further functionalization.
