- One-pot synthesis ofN-substituted benzannulated triazolesviastable arene diazonium salts
-
A mild and effective one-pot synthesis of 1,2,3-benzotriazin-4(3H)-ones and benzothiatriazine-1,1(2H)-dioxide analogues has been developed. The method involves the diazotisation and subsequent cyclisation of 2-aminobenzamides and 2-aminobenzenesulfonamidesviastable diazonium salts, prepared using a polymer-supported nitrite reagent andp-tosic acid. The transformation was compatible with a wide range of aryl functional groups and amide/sulfonamide-substituents and was used for the synthesis of pharmaceutically important targets. The synthetic utility of the one-pot diazotisaton-cyclisation process was further demonstrated with the preparation of an α-amino acid containing 1,2,3-benzotriazin-4(3H)-one.
- Faggyas, Réka J.,McGrory, Rochelle,Sutherland, Andrew
-
supporting information
p. 6127 - 6140
(2021/07/21)
-
- Quinazolinone-dihydropyrano[3,2-b]pyran hybrids as new α-glucosidase inhibitors: Design, synthesis, enzymatic inhibition, docking study and prediction of pharmacokinetic
-
A series of new quinazolinone-dihydropyrano[3,2-b]pyran derivatives 10A-L were synthesized by simple chemical reactions and were investigated for inhibitory activities against α-glucosidase and α-amylase. New synthesized compounds showed high α-glucosidase inhibition effects in comparison to the standard drug acarbose and were inactive against α-amylase. Among them, the most potent compound was compound 10L (IC50 value = 40.1 ± 0.6 μM) with inhibitory activity around 18.75-fold more than acarboase (IC50 value = 750.0 ± 12.5 μM). This compound was a competitive inhibitor into α-glucosidase. Our obtained experimental results were confirmed by docking studies. Furthermore, the cytotoxicity of the most potent compounds 10L, 10G, and 10N against normal fibroblast cells and in silico druglikeness, ADME, and toxicity prediction of these compounds were also evaluated.
- Sherafati, Maedeh,Mirzazadeh, Roghieh,Barzegari, Ebrahim,Mohammadi-Khanaposhtani, Maryam,Azizian, Homa,Sadegh Asgari, Mohammad,Hosseini, Samanesadat,Zabihi, Ebrahim,Mojtabavi, Somayeh,Ali Faramarzi, Mohammad,Mahdavi, Mohammad,Larijani, Bagher,Rastegar, Hossein,Hamedifar, Haleh,Hamed Hajimiri, Mir
-
-
- Efficient synthesis of 6,6a-dihydroisoindolo[2,1-a]quinazoline-5,11-dione derivatives catalyzed by functionalized nanoporous silica
-
An efficient and facile method has been developed for the synthesis of various 6,6a-dihydroisoindolo[2,1-a]quinazoline-5,11-dione derivatives, via a three-component reaction of 2-amino-N-(R)-benzamide derivatives with 2-formylbenzoic acid using sulfonic acid functionalized nanoporous silica as an efficient catalyst in ethanol under reflux. High yield of the desired products, reusability of the catalyst, and effortless workup step without using chromatography are the advantages of this method. Graphic abstract: [Figure not available: see fulltext.]
- Rayatzadeh, Ayeh,Haghipour, Sirous
-
p. 103 - 107
(2021/02/05)
-
- Design, synthesis, in vitro and in silico biological assays of new quinazolinone-2-thio-metronidazole derivatives
-
A new series of quinazolinone-2-thio-metronidazole derivatives 9a-o was designed, synthesized and assayed for their activities against metabolic enzymes human carbonic anhydrase I and II (hCAs I and II), acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and α-glucosidase. The results indicated that all the synthesized compounds exhibited excellent inhibitory activities against mentioned enzymes as compared with standard inhibitors. Representatively, the most potent compound against CA enzymes, 4-fluorophenyl derivative 9i, was 4 and 7-times more potent than standard inhibitor acetazolamide against hCA I and II, respectively; 4-fluorobenzyl derivative 9m as the most potent compound against cholinesterase enzymes, was around 11 and 21-times more potent than standard inhibitor tacrine against AChE and BChE, respectively; the most active α-glucosidase inhibitor 9h with 4-methoxyphenyl moiety was 5-times more active that acarbose as standard inhibitor. Furthermore, in order to study interaction modes of the most potent compounds in the active site of their related enzymes, molecular modeling was performed. Druglikeness, ADME, and toxicity profile of the compounds 9i, 9m, and 9h were also predicted.
- Ansari, Samira,Asgari, Mohammad Sadegh,Biglar, Mahmood,Esfahani, Ensieh Nasli,Hamedifar, Haleh,Larijani, Bagher,Mahdavi, Mohammad,Mohammadi-Khanaposhtani, Maryam,Rastegar, Hossein,Tas, Recep,Taslimi, Parham
-
-
- Electrochemical utilization of methanol and methanol-d4 as a C1 source to access (deuterated) 2,3-dihydroquinazolin-4(1H)-one
-
Herein, an electrocatalytic protocol for the synthesis of 2,3-dihydroquinazolin-4(1H)-one has been disclosed. Methanol is activated and utilized as the C1 source to cyclize with 2-aminobenzamides. This cyclization reaction proceeds conveniently (room temperature and air atmosphere) without any homogeneous metal catalysts, external oxidants, or bases. A wide variety of N,N-disubstituted 2,3-dihydroquinazolin-4(1H)-ones are obtained via this approach. Moreover, when methanol-d4 is used, a deuterated methylene motif is incorporated into the N-heterocycles, providing an efficient approach to the deuterated N-heterocycles.
- Liu, Mingzhu,Wei, Yu,Xu, Liang
-
supporting information
(2021/10/06)
-
- New spiro pyrrole[2, 1-b]quinazolone derivative, preparation method and application thereof
-
The invention relates to a new spiro pyrrole[2, 1-b]quinazolone derivative, a preparation method and application thereof. The new spiro pyrrole[2, 1-b]quinazolone derivative is synthesized by using asimple method. The yield is high, the production cost is
- -
-
Paragraph 0035-0037; 0198-0199; 0201
(2020/11/09)
-
- Synthesis of 2-aryl quinazolinones: Via iron-catalyzed cross-dehydrogenative coupling (CDC) between N-H and C-H bonds
-
Herein, we describe the direct synthesis of quinazolinones via cross-dehydrogenative coupling between methyl arenes and anthranilamides. The C-H functionalization of the benzylic sp3 carbon is achieved by di-t-butyl peroxide under air, and the subsequent amination-aerobic oxidation process completes the annulation process. Iron catalyzed the whole reaction process and various kinds of functional groups were tolerated under the reaction conditions, providing 31 examples of 2-aryl quinazolinones using methyl arene derivatives in yields of 57-95percent. The synthetic potential has been demonstrated by the additional synthesis of aryl-containing heterocycles. This journal is
- Jang, Yoonkyung,Lee, Seok Beom,Hong, Junhwa,Chun, Simin,Lee, Jeeyeon,Hong, Suckchang
-
supporting information
p. 5435 - 5441
(2020/08/03)
-
- Novel quinazolin–sulfonamid derivatives: synthesis, characterization, biological evaluation, and molecular docking studies
-
In the design of novel drugs, the formation of hybrid molecules via the combination of several pharmacophores can give rise to compounds with interesting biochemical profiles. A series of novel quinazolin–sulfonamid derivatives (9a–m) were synthesized, characterized and evaluated for their in vitro antidiabetic, anticholinergics, and antiepileptic activity. These synthesized novel quinazolin–sulfonamid derivatives (9a–m) were found to be effective inhibitor molecules for the α-glycosidase, human carbonic anhydrase I and II (hCA I and hCA II), butyrylcholinesterase (BChE) and acetylcholinesterase (AChE) enzyme, with Ki values in the range of 100.62 ± 13.68–327.94 ± 58.21 nM for α-glycosidase, 1.03 ± 0.11–14.87 ± 2.63 nM for hCA I, 1.83 ± 0.24–15.86 ± 2.57 nM for hCA II, 30.12 ± 3.81–102.16 ± 13.87 nM for BChE, and 26.16 ± 3.63–88.52 ± 20.11 nM for AChE, respectively. In the last step, molecular docking calculations were made to compare biological activities of molecules against enzymes which are achethylcholinesterase, butyrylcholinesterase and α-glycosidase. Communicated by Ramaswamy H. Sarma.
- Sepehri, Nima,Mohammadi-Khanaposhtani, Maryam,Asemanipoor, Nafise,Hosseini, Samanesadat,Biglar, Mahmood,Larijani, Bagher,Mahdavi, Mohammad,Hamedifar, Haleh,Taslimi, Parham,Sadeghian, Nastaran,Norizadehtazehkand, Mostafa,Gulcin, Ilhami
-
-
- Method for reducing aromatic nitro into arylamine
-
The invention relates to a method for reducing aromatic nitro to arylamine. The method comprises the following steps: (1) taking an aromatic nitro compound as a raw material, water as a hydrogen source, a palladium compound, cheap and easy to obtain, as a catalyst and tetrahydroxydiboron as an additive to reduce nitro to obtain a product; (2) taking the aromatic nitro compound as the raw material, a copper salt, cheap and easy to obtain, as the catalyst, the tetrahydroxydiboron as the additive to reduce the nitro to obtain a product; and (3) taking the aromatic nitro compound as the raw material, water as the hydrogen source, and the tetrahydroxydiboron as the additive, without needing a metal catalyst, to reduce the nitro to obtain a product. A preparation method for the arylamine, which is provided by the invention, is mild in reaction condition, low in costs, environment-friendly, high in yield, and suitable for industrial production.
- -
-
Paragraph 0161-0164
(2020/07/15)
-
- Thermo-Promoted Reactions of Anthranils with Carboxylic Acids, Amines, Phenols, and Malononitrile under Catalyst-Free Conditions
-
A convenient and atom-economical procedure for the thermo-promoted reactions of anthranil with different substrates was developed. The catalyst-free process affords various useful building blocks with good to moderate yields. This chemistry enables several step- and cost-effective approaches for biologically interesting molecules and provides an efficient platform for the investigation of untapped reactions at high temperature.
- Jiang, Jing,Cai, Xin,Hu, Yanwei,Liu, Xuejun,Chen, Xiaodong,Wang, Shun-Yi,Zhang, Yinan,Zhang, Shilei
-
supporting information
p. 2022 - 2031
(2019/05/16)
-
- Discovery of Novel Transient Receptor Potential Vanilloid 4 (TRPV4) Agonists as Regulators of Chondrogenic Differentiation: Identification of Quinazolin-4(3 H)-ones and in Vivo Studies on a Surgically Induced Rat Model of Osteoarthritis
-
Osteoarthritis (OA) is a degenerative disease characterized by joint destruction and loss of cartilage. There are many unmet needs in the treatment of OA and there are few promising candidates for disease-modifying OA drugs, particularly, anabolic agents. Here, we describe the identification of novel quinazolin-4(3H)-one derivatives, which stimulate chondrocyte cartilage matrix production via TRPV4 and mitigate damaged articular cartilage. We successfully identified the water-soluble, highly potent quinazolin-4(3H)-one derivative 36 and studied its intra-articular physicochemical profile to use in in vivo surgical OA model studies. Compound 36·HCl provided relief from OA damage in a rat medial meniscal tear (MT) model. Specifically, 36·HCl dose-dependently suppressed cartilage degradation and enhanced the messenger RNA expression of aggrecan and SOX9 in cartilage isolated from MT-operated rat knees compared with knees treated with vehicle. These results suggest that 36 induces anabolic changes in articular cartilage and consequently reduces OA progression.
- Atobe, Masakazu,Nagami, Takamichi,Muramatsu, Shuji,Ohno, Takeshi,Kitagawa, Masayuki,Suzuki, Hiroko,Ishiguro, Masashi,Watanabe, Atsushi,Kawanishi, Masashi
-
p. 1468 - 1483
(2019/02/14)
-
- Sustainable methine sources for the synthesis of heterocycles under metal- and peroxide-free conditions
-
Alcohols and ethers were identified as sustainable methine sources for synthesizing quinazolinone and benzimidazole derivatives using a combination of TsOH·H2O/O2 and appropriate bis-nucleophiles for the first time. Deuterium labeling studies clearly proved that the C2 hydrogen of the synthesized heterocycles came from the methine source. These unique reaction conditions were successfully applied to the synthesis of echinozolinone (2e′), 2f′ (a common precursor of rutaecarpine and (±) evodiamine), and dimedazole (6d). Notable features of this method include its low toxicity, use of commercial feedstocks as substrates, low cost, broad functional group tolerance and suitability for a wide range of bis-nucleophilic starting materials.
- Senadi, Gopal Chandru,Kudale, Vishal Suresh,Wang, Jeh-Jeng
-
supporting information
p. 979 - 985
(2019/03/12)
-
- Sulfur-Promoted Synthesis of 2-Aroylquinazolin-4(3H)-ones by Oxidative Condensation of Anthranilamide and Acetophenones
-
A sulfur-promoted three-component reaction of isatoic anhydride, primary aliphatic or aromatic amines, and acetophenones leading to densely substituted 3-substituted 2-aroylquinazolin-4(3H)-ones is reported. The key step involves a cascade reaction of selective oxidation of the methyl group of the acetophenones, followed by a condensation with anthranilamides. The scope of the reaction is applicable to the synthesis of tryptanthrin and various 3-unsubstituted 2-aroylquinazolin-4(3H)-ones. (Figure presented.).
- Nguyen, Thanh Binh,Hou, Jing-ya,Retailleau, Pascal
-
p. 3337 - 3341
(2019/06/13)
-
- One-Pot, Multistep Reactions for the Modular Synthesis of N, N′-Diarylindazol-3-ones
-
The pot-economic synthesis of N,N′-diarylindazol-3-ones has been developed using readily available isatoic anhydrides, aryl amines, and aryl boronic acids. A Cu-catalyzed oxidative C-N cross-coupling and dehydrogenative N-N formation sequence under an air atmosphere affords indazol-3-one derivatives in good to excellent yields. Such process merges well with the preceding decarboxylative amination reaction, resulting in a more modular and straightforward approach.
- Liu, Shuai,Xu, Liang,Wei, Yu
-
p. 1596 - 1604
(2019/02/07)
-
- Metal-free Reduction of Nitro Aromatics to Amines with B 2 (OH) 4 /H 2 O
-
A metal-free reduction of nitro aromatics mediated by diboronic acid with water as both the hydrogen donor and solvent under mild conditions has been developed. A series of aromatic amines were obtained with good functional group tolerance and in good yields.
- Chen, Danyi,Zhou, Yanmei,Zhou, Haifeng,Liu, Sensheng,Liu, Qixing,Zhang, Kaili,Uozumi, Yasuhiro
-
supporting information
p. 1765 - 1768
(2018/06/26)
-
- Synthesis and properties of 1,2-dihydro-4(3H)-quinazolinones
-
We modified the preparative-scale method for the synthesis of 2-aryl 1,2-dihydro-4(3H)-quinazolinone derivatives obtained in high yields by the reaction of new and commercially available aromatic aldehydes with anthranilic acid amides. A series of quinazolinone derivatives possessing anticancer and antiparasitic activities, as well as capable of preventing the progress of neurodegenerative diseases were characterized. There are grounds for clinical trials of these substances in order to select compounds being promising for clinical application.
- Khachatryan,Belus,Misyurin,Baryshnikova,Kolotaev,Matevosyan
-
p. 1044 - 1058
(2017/10/31)
-
- Synthesis and thrombin, factor Xa and U46619 inhibitory effects of non-amidino and amidino N2-thiophenecarbonyl- and N2-tosylanthranilamides
-
Thrombin (factor IIa) and factor Xa (FXa) are key enzymes at the junction of the intrinsic and extrinsic coagulation pathways and are the most attractive pharmacological targets for the development of novel anticoagulants. Twenty non-amidino N2-thiophencarbonyl- and N2-tosyl anthranilamides 1-20 and six amidino N2-thiophencarbonyl- and N2-tosylanthranilamides 21-26 were synthesized to evaluate their activated partial thromboplastin time (aPTT) and prothrombin time (PT) using human plasma at a concentration of 30 μg/mL in vitro. As a result, compounds 5, 9, and 21-23 were selected to study the further antithrombotic activity. The anticoagulant properties of 5, 9, and 21-23 significantly exhibited a concentration-dependent prolongation of in vitro PT and aPTT, in vivo bleeding time, and ex vivo clotting time. These compounds concentration-dependently inhibited the activities of thrombin and FXa and inhibited the generation of thrombin and FXa in human endothelial cells. In addition, data showed that 5, 9, and 21-23 significantly inhibited thrombin catalyzed fibrin polymerization and mouse platelet aggregation and inhibited platelet aggregation induced by U46619 in vitro and ex vivo. Among the derivatives evaluated, N-(30-amidinophenyl)-2-((thiophen-200-yl)carbonylamino)benzamide (21) was the most active compound.
- Lee, Soo Hyun,Lee, Wonhwa,Nguyen, ThiHa,Um, Il Soo,Bae, Jong-Sup,Ma, Eunsook
-
-
- Water as a hydrogen source in palladium-catalyzed reduction and reductive amination of nitroarenes mediated by diboronic acid
-
An unprecedented palladium-catalyzed chemoselective reduction and reductive amination of nitroarenes with water as a hydrogen source mediated by diboronic acid have been discovered. A series of aryl amines containing various reducible functional groups were obtained in good to excellent yields.
- Zhou, Yanmei,Zhou, Haifeng,Liu, Sensheng,Pi, Danwei,Shen, Guanshuo
-
p. 3898 - 3904
(2017/06/13)
-
- Reaction of benzyl alcohols, isatoic anhydride, and primary amines mediated by I2/K2CO3 in water: A new and green approach for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones
-
An efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones proceeding via a three-component reaction between benzyl alcohols, isatoic anhydride, and primary amines in the presence of iodine and potassium carbonate is reported. This protocol allows the straightforward preparation of the titled products using readily available benzyl alcohols instead of unstable aldehydes under mild oxidative conditions.
- Azimi, Seyedeh Bahareh,Azizian, Javad
-
p. 181 - 184
(2015/12/30)
-
- Novel β-carboline-quinazolinone hybrid as an inhibitor of Leishmania donovani trypanothione reductase: Synthesis, molecular docking and bioevaluation
-
Trypanothione reductase (TR) is a vital enzyme in the trypanothione based redox metabolism of trypanosomatid parasites. It is one of the few chemically validated targets for Leishmania. Herein, we report the synthesis of novel β-carboline-quinazolinone hybrids that are able to inhibit Leishmania donovani TR (LdTR) and subsequently inhibit cell growth. A molecular modeling approach based on docking studies and subsequent binding free energy estimation was performed in the active site of LdTR to understand their possible binding sites. With the enzymatic assay on LdTR with compounds, we were able to identify six hit compounds (8j-8o) that were all found to be the competitive inhibitors of TR with Ki in the range of 0.8-9.2 μM. The whole-cell screening assay highlighted the analogues 8k, 8l and 8n as the most active compounds with IC50 of 4.4, 6.0 and 4.3 μM, respectively, along with an adequate selectivity index (SI) of >91, 36 and 24, respectively. This journal is
- Chauhan, Shikha S.,Pandey, Shashi,Shivahare, Rahul,Ramalingam, Karthik,Krishna, Shagun,Vishwakarma, Preeti,Siddiqi,Gupta, Suman,Goyal, Neena,Chauhan, Prem M. S.
-
supporting information
p. 351 - 356
(2015/03/18)
-
- Synthesis and anticancer activity of N -substituted 2-arylquinazolinones bearing trans -stilbene scaffold
-
A novel series of 2-arylquinazolinones 7a-o bearing trans-stilbene moiety were designed, synthesized, and evaluated against human breast cancer cell lines including human breast adenocarcinoma (MCF-7 and MDA-MB-231) and human ductal breast epithelial tumor (T-47D). Among the tested compounds, the sec-butyl derivative 7h showed the best profile of activity (IC50 5 μM) against all cell lines, being 2-fold more potent than standard drug, etoposide. Our investigation revealed that the cytotoxic activity was significantly affected by N3-alkyl substituents. Furthermore, the morphological analysis by acridine orange/ethidium bromide double staining test and flow cytometry analysis indicated that the prototype compound 7h can induce apoptosis in MCF-7 and MDA-MB-231 cells.
- Mahdavi, Mohammad,Pedrood, Keyvan,Safavi, Maliheh,Saeedi, Mina,Pordeli, Mahboobeh,Ardestani, Sussan Kabudanian,Emami, Saeed,Adib, Mehdi,Foroumadi, Alireza,Shafiee, Abbas
-
p. 492 - 499
(2015/04/14)
-
- Copper-catalyzed radical methylation/C-H amination/oxidation cascade for the synthesis of quinazolinones
-
A copper-catalyzed radical methylation/sp3 C-H amination/oxidation reaction for the facile synthesis of quinazolinone was developed. In this cascade reaction, dicumyl peroxide acts not only as a useful oxidant but also as an efficient methyl source. Notably, a methyl radical, generated from peroxide, was confirmed by electron paramagnetic resonance for the first time.
- Bao, Yajie,Yan, Yizhe,Xu, Kun,Su, Jihu,Zha, Zhenggen,Wang, Zhiyong
-
p. 4736 - 4742
(2015/05/13)
-
- Solvent-free synthesis of novel benzodiazepine derivatives by a three-component base-catalysed reaction of isatoic anhydride, a primary amine and chloroacetyl chloride
-
Heating isatoic anhydride with a series of primary amines at 150 °C under solvent-free conditions yielded 2-amino-N-alkylbenzamides which, in the same pot, reacted readily with chloroacetyl chloride in the presence of poly(dimethylaminoethyl acrylamide)-modified magnetic nanoparticles (MNP@PDMA), a base catalyst, to give 4-alkyl-1,4-benzodiazepine-2,5-diones in good yields without formation of by-products.
- Seydey, Mohsen Khalilpour,Rezaei, Zahra,Homami, Seyed Saied
-
p. 286 - 288
(2015/06/02)
-
- Scaffold identification of a new class of potent and selective BCRP inhibitors
-
We recently reported the synthesis and quantitative structure-activity relationships of a new breast cancer resistance protein (BCRP) inhibitor class. In the study presented herein, we investigated the possibility to better define the scaffold of this compound class by removing or modifying the aromatic ring A with various substituents selected on the basis of their electronic and lipophilic properties. The results show that this aromatic ring is important, but not essential, for activity. Many of the selected substituents led to compounds with low activity, but in some cases activity was retained. Among these, a phenolic hydroxy group proved to impart as much potency to the molecule as a hydroxyethyl side chain, initially considered necessary for activity. This derivative is one of the most active compounds in this class, maintaining an inhibitory activity similar to that of the reference compound; it is also selective for BCRP.
- Marighetti, Federico,Steggemann, Kerstin,Karbaum, Maria,Wiese, Michael
-
p. 742 - 751
(2015/04/14)
-
- Photophysical properties of 2,3-dihydroquinazolin-4(1H)-one derivatives
-
2,3-Dihydroquinazolin-4(1H)-one (DHQ) derivatives were synthesized by treatment of isatoic anhydride with amines and subsequent cyclocondensation with aldehydes or ketones. The derivatives were characterized by 1H and 13C NMR, elemental analysis and HRMS. Absorption and emission spectra of DHQ derivatives were recorded in different solvents (hexadecane, benzene, chloroform, methanol and acetonitrile). Both the absorption and the emission maxima are solvent-dependent and red-shifted. Molar extinction coefficients were determined to be 2364-4820 M-1 cm-1. The Stokes shifts of the compounds are large and increase with solvent polarity. This feature and the bathochromic effect shown for the absorption and emission processes indicate that the dipole moment of these fluorescent molecules is higher in the excited state than in the ground state. The fluorescence quantum yield and lifetime were obtained in different solvents for DHQ 4.
- Cabrera-Rivera, Fanny A.,Escalante, Jaime,Morales-Rojas, Hugo,Zigler, David F.,Schmidt, Robert D.,Jarocha, Lauren E.,Forbes, Malcolm D.E.
-
-
- Photophysical properties of 2,3-dihydroquinazolin-4(1H)-one derivatives
-
2,3-Dihydroquinazolin-4(1H)-one (DHQ) derivatives were synthesized by treatment of isatoic anhydride with amines and subsequent cyclocondensation with aldehydes or ketones. The derivatives were characterized by 1H and 13C NMR, elemental analysis and HRMS. Absorption and emission spectra of DHQ derivatives were recorded in different solvents (hexadecane, benzene, chloroform, methanol and acetonitrile). Both the absorption and the emission maxima are solvent-dependent and red-shifted. Molar extinction coefficients were determined to be 2364-4820 M-1 cm-1. The Stokes shifts of the compounds are large and increase with solvent polarity. This feature and the bathochromic effect shown for the absorption and emission processes indicate that the dipole moment of these fluorescent molecules is higher in the excited state than in the ground state. The fluorescence quantum yield and lifetime were obtained in different solvents for DHQ 4.
- Cabrera-Rivera, Fanny A.,Escalante, Jaime,Morales-Rojas, Hugo,Zigler, David F.,Schmidt, Robert D.,Jarocha, Lauren E.,Forbes, Malcolm D.E.
-
-
- Natural surfactant mediated phytosynthesis and solvatochromic fluorescence of 2-aminobenzamide derivatives
-
A green synthesis and intriguing solvatochromic behaviour of 2-aminobenzamide derivatives in varying solvents has been investigated. The biomaterial in the form of an aqueous extract of mesocarp of the fruit of the Balanites roxburghii plant as a natural surfactant reaction medium has been employed for phytosynthesis with quantitative yield at 60 °C. The reaction proceeds effortlessly in a short reaction time with easy product formation. The fluorescence property of some synthesized compounds was studied, along with the interesting solvatochromic behaviour of 2-amino-N-benzylbenzamide.
- More, Pallavi,Patil, Amol,Salunkhe, Rajashri
-
p. 63039 - 63047
(2015/02/19)
-
- SPIRO-QUINAZOLINONE DERIVATIVES USEFUL FOR THE TREATMENT OF NEUROLOGICAL DISEASES AND CONDITIONS
-
The present invention relates to novel spiro-quinazolinone derivatives as positive allosteric modulators for modulating metabotropic glutamate receptor subtype 4 (mGluR4) and/or altering glutamate level or glutamatergic signalling
- -
-
Page/Page column 71
(2014/08/19)
-
- Metal-free oxidative synthesis of quinazolinones via dual amination of sp3 C-H bonds
-
A novel metal-free synthesis of quinazolinones via dual amination of sp3 C-H bonds was developed. The sp3 carbon in methylarenes or adjacent to a heteroatom in DMSO, DMF or DMA was used as the one carbon synthon. This journal is the Partner Organisations 2014.
- Zhao, Dan,Wang, Teng,Li, Jian-Xin
-
supporting information
p. 6471 - 6474
(2014/06/09)
-
- Synthesis, antimicrobial evaluation, ot-QSAR and mt-QSAR studies of 2-amino benzoic acid derivatives
-
A series of 2-amino benzoic acid derivatives (1-28) were synthesized and evaluated for their in vitro antimicrobial activity against the panel of Gram positive, Gram negative bacterial and fungal strains. The results of antimicrobial studies indicated that, in general, the synthesized compounds were found to be bacteriostatic and fungistatic in action. QSAR studies performed by the development of one target and multi target models indicated that multi-target model was effective in describing the antimicrobial activity as well demonstrated the effect of structural parameters viz. LUMO, 3χv and W on antimicrobial activity of 2-amino benzoic acid derivatives. Springer Science+Business Media, LLC 2010.
- Mahiwal, Kuldeep,Kumar, Pradeep,Narasimhan, Balasubramanian
-
experimental part
p. 293 - 307
(2012/09/07)
-
- Direct halogenation reactions in 2,3-dihydro-4(1H)-quinazolinones
-
Reaction of 2,3-dihydro-4(1H)-quinazolinones with NBS, Br 2/Et3N and NCS yields 6,8-Br/Cl-2,3-dihydro-4(1H)- quinazolinones with moderate to good yield. The method does not require a catalyst and offers extremely short reaction time.
- Cabrera-Rivera, Fanny A.,Ortiz-Nava, Claudia,Roman-Bravo, Perla,Escalante, Jaime,Leyva, Marco A.
-
p. 2173 - 2195,23
(2020/08/31)
-
- Discovery of N-[2-hydroxy-6-(4-methoxybenzamido)phenyl]-4- (4-methyl-1,4-diazepan-1-yl)benzamide (darexaban, YM150) as a potent and orally available factor Xa inhibitor
-
Inhibitors of factor Xa (FXa), a crucial serine protease in the coagulation cascade, have attracted a great deal of attention as a target for developing antithrombotic agents. We previously reported findings from our optimization study of a high-throughpu
- Hirayama, Fukushi,Koshio, Hiroyuki,Ishihara, Tsukasa,Hachiya, Shunichiro,Sugasawa, Keizo,Koga, Yuji,Seki, Norio,Shiraki, Ryouta,Shigenaga, Takeshi,Iwatsuki, Yoshiyuki,Moritani, Yumiko,Mori, Kenichi,Kadokura, Takeshi,Kawasaki, Tomihisa,Matsumoto, Yuzo,Sakamoto, Shuichi,Tsukamoto, Shin-Ichi
-
scheme or table
p. 8051 - 8065
(2012/03/08)
-
- A regioselective three-component reaction for synthesis of novel 1′H-spiro[isoindoline-1,2′-quinazoline]-3,4′(3′H)-dione derivatives
-
A ring opening and regioselective three-component reaction of isatoic anhydride, isatins, and aromatic or aliphatic primary amines in the presence of catalytic amount of KAl(SO4)2·12H2O (alum) to yield a novel series of 1′H-spiro[isoindoline-1,2′-quinazoline]-3,4′(3′H)-dione is described.
- Mohammadi, Ali A.,Dabiri,Qaraat
-
body text
p. 3804 - 3808
(2009/09/05)
-
- QUINAZOLINONE AND FUSED PYRIMIDINONE COMPOUNDS AND THEIR USE IN TREATING SODIUM CHANNEL-MEDIATED DISEASES OR CONDITIONS
-
This invention is directed to compounds of formula (I): wherein (A), n, R1, R2 and R3 are as defined herein, as a stereoisomer, enantiomer, tautomer thereof or mixtures thereof; or a pharmaceutically acceptable salt, solvate or prodrug thereof, for the treatment and/or prevention of sodium channel-mediated diseases or conditions, such as pain.
- -
-
Page/Page column 91
(2008/12/07)
-
- Anthranilamide inhibitors of factor Xa
-
SAR about the B-ring of a series of N2-aroyl anthranilamide factor Xa (fXa) inhibitors is described. B-ring o-aminoalkylether and B-ring p-amine probes of the S1′ and S4 sites, respectively, afforded picomolar fXa inhibitors that performed well in in vitro anticoagulation assays.
- Mendel, David,Marquart, Angela L.,Joseph, Sajan,Waid, Philip,Yee, Ying K.,Tebbe, Anne Louise,Ratz, Andrew M.,Herron, David K.,Goodson, Theodore,Masters, John J.,Franciskovich, Jeffry B.,Tinsley, Jennifer M.,Wiley, Michael R.,Weir, Leonard C.,Kyle, Jeffrey A.,Klimkowski, Valentine J.,Smith, Gerald F.,Towner, Richard D.,Froelich, Larry L.,Buben, John,Craft, Trelia J.
-
p. 4832 - 4836
(2008/02/11)
-
- Practical synthesis of potential endothelin receptor antagonists of 1,4-benzodiazepine-2,5-dione derivatives bearing substituents at the C 3-, N1- and N4-positions
-
The expedient synthesis of various 1,4-benzodiazepine-2,5-dione compounds, particularly those having substituents at the C3-, N1- and N4-positions is achieved. The important features in these synthetic strategies include: (i) using the coupling reaction of isatoic anhydride with α-amino ester for direct construction of the core structure of 1,4-benzodiazepine-2,5-dione; (ii) using potassium carbonate as the base of choice for selective alkylation at the N1-site, while using lithiated 2-ethylacetanilide as the required base to furnish the N4- alkylation; and (iii) using 2-nitrobenzoyl chloride as a synthetic equivalent of anthranilic acid to facilitate the polyethylene resin-bound liquid-phase combinatorial synthesis. The prepared 1,4-benzodiazepine-2,5-dione compounds are evaluated for endothelin receptor antagonism by a functional assay that measures the inhibitory activity against the change of intramolecular calcium ion concentration induced by endothelin-1. The preliminary results indicate that 1,4-benzodiazepine-2,5-diones bearing two flanked aryl substituents at the N1- and N4-sites show better inhibitory activity than the corresponding unalkylated and N-monoalkylated compounds. A promising candidate, 1-benzyl-7-chloro-3-isopropyl-4-(3-methoxybenzyl)-1,4-benzodiazepine-2,5-dione (17b), exhibits an IC50 value in low nM range. The Royal Society of Chemistry 2006.
- Cheng, Ming-Fu,Yu, Hui-Ming,Ko, Bor-Wen,Chang, Yu,Chen, Ming-Yi,Ho, Tong-Ing,Tsai, Yeun-Min,Fang, Jim-Min
-
p. 510 - 518
(2007/10/03)
-
- Pyrimidinone compounds
-
This invention relates to treating inflammatory and immune diseases with certain pyrimidinone compounds that bind to CXCR3 receptors. The pyrimidinone compounds are covered by the formula (I) shown below. Each variable is defined in the specification.
- -
-
Page/Page column 37 - 38
(2010/10/19)
-
- Novel alternative for the N-N bond formation through a PIFA-mediated oxidative cyclization and its application to the synthesis of indazol-3-ones
-
The synthesis of a series of N,N′-disubstituted indazolone derivatives starting from methyl anthranilates is presented. This general approach features a novel and easy way for access to the target N-heterocycles by formation of a new N-N single bond. The
- Correa, Arkaitz,Tellitu, Imanol,Dominguez, Esther,SanMartin, Raul
-
p. 3501 - 3505
(2007/10/03)
-
- Synthesis of 1,4-benzodiazepine-2,5-dione derivatives
-
A synthesis of a series of 1,4-benzodiazepine-2,5-dione derivatives with a carboxy group at the 3-position is realized in good yields by using methyl malonylchloride as a key reagent and intramolecular nucleophilic substitution as ring closure reaction.
- Ho, Tong-Ing,Chen, Wen-Shiong,Hsu, Chi-Wei,Tsai, Yeun-Min,Fang, Jim-Min
-
p. 1501 - 1506
(2007/10/03)
-
- Antithrombotic agents
-
This application relates to a compound of formula (I), a pharmaceutically acceptable salt of the compound, or a prodrug thereof, as defined herein, pharmaceutical compositions thereof, and its use as an inhibitor of factor Xa, as well as a process for its
- -
-
-
- Antithrombotic agents
-
This application relates to a compound of formula (I), a pharmaceutically acceptable salt of the compound, or a prodrug thereof, as defined herein, pharmaceutical compositions thereof, and its use as an inhibitor of factor Xa, as well as a process for its preparation and intermediates therefor.
- -
-
-
- N2-aroylanthranilamide inhibitors of human factor Xa
-
Reversal of the A-ring amide link in 1,2-dibenzamidobenzene 1 (fXa K(ass) = 0.81 x 106 L/mol) led to a series of human factor Xa (hfXa) inhibitors based on N2-aroylanthranilamide 4. Expansion of the SAR around 4 showed that only smal
- Yee, Ying K.,Tebbe, Anne Louise,Linebarger, Jared H.,Beight, Douglas W.,Craft, Trelia J.,Gifford-Moore, Donetta,Goodson Jr., Theodore,Herron, David K.,Klimkowski, Valentine J.,Kyle, Jeffrey A.,Sawyer, J. Scott,Smith, Gerald F.,Tinsley, Jennifer M.,Towner, Richard D.,Weir, Leonard,Wiley, Michael R.
-
p. 873 - 882
(2007/10/03)
-
- Structure-based design of potent, amidine-derived inhibitors of factor Xa: Evaluation of selectivity, anticoagulant activity, and antithrombotic activity
-
To enhance the potency of 1,2-dibenzamidobenzene-derived inhibitors of factor Xa (fXa), an amidine substituent was incorporated on one of the benzoyl side chains to interact with Asp189 in the S1 specificity pocket. Lead molecule I was docked into the act
- Wiley, Michael R.,Weir, Leonard C.,Briggs, Steven,Bryan, Nancy A.,Buben, John,Campbell, Charles,Chirgadze, Nickolay Y.,Conrad, Richard C.,Craft, Trelia J.,Ficorilli, James V.,Franciskovich, Jeffry B.,Froelich, Larry L.,Gifford-Moore, Donetta S.,Goodson Jr., Theodore,Herron, David K.,Klimkowski, Valentine J.,Kurz, Kenneth D.,Kyle, Jeffery A.,Masters, John J.,Ratz, Andrew M.,Milot, Guy,Shuman, Robert T.,Smith, Tommy,Smith, Gerald F.,Tebbe, Ann Louise,Tinsley, Jennifer M.,Towner, Richard D.,Wilson, Alexander,Yee, Ying K
-
p. 883 - 899
(2007/10/03)
-
- Relationships between the chemical structure of substances and their antimycobacterial activity against atypical strains. Part 18. 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-diones and isosteric 3-phenylquinazoline-2,4(1H,3H)-diones
-
A series of 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-diones 2 and 3-phenylquinazoline-2,4(1H,3H)-diones 5 substituted on the phenyl rings were synthesized. The target compounds as well as the intermediates were tested against Mycobacterium tuberculosis, M. kansasii, and M. avium. The replacement of the oxygen atom by nitrogen resulted in a decrease or loss of antimycobacterial activity. 2-[(Ethoxycarbonyl)amino]benzanilides 4 appeared to be inactive. Salicylanilides 1 and 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-diones 2 exhibit significant activity against both M. tuberculosis and nontuberculous mycobacteria (the MICs within the range of 4-250 μmol/l for all compounds). The antimycobacterial activity of the compounds increases with increasing both electron-withdrawing properties and hydrophobicity of the substituent(s) on the phenyl moiety. The antimycobacterial profile of the compounds was analyzed according to the criteria based on vector algebra, such as cosine coefficients. Moreover, salicylanilides 1 exhibit activity against other microorganisms tested by the agar diffusion method.
- Waisser, Karel,Machacek, Milos,Dostal, Hynek,Gregor, Jiri,Kubicova, Lenka,Klimesova, Vera,Kunes, Jiri,Palat Jr., Karel,Hladuvkova, Jana,Kaustova, Jarmila,Moellmann, Ute
-
p. 1902 - 1924
(2007/10/03)
-
- Synthesis and in vitro study of platelet antiaggregant activity of 1,2,3,4-tetrahydroquinazoline derivatives
-
Some original 3-substituted 1,2,3,4-tetrahydroquinazolines were synthesized. Their antiplatelet activity was evaluated in vitro with respect to aggregation induced by the main inducers (ADP, collagen, arachidonic acid), platelet serotonin release reaction and thromboxane A2 synthesis. All these molecules possess an inhibiting power which, compared to that of aspirin in the same conditions, is the same or greater when aggregation is induced by ADP.
- Gravier,Dupin,Casadebaig,Hou,Boisseau,Bernard
-
p. 531 - 535
(2007/10/02)
-