- Catalyst- and acid-free Markovnikov hydration of alkynes in a sustainable H2O/ethyl lactate system
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An efficient and sustainable protocol for the hydration of alkynes has been developed under metal/acid/catalyst/ligand-free conditions in a water/ethyl lactate mixture. The hydrogen-bond network in the ethyl lactate and water mixture plays a crucial and decisive role in activating the alkynes for hydration to afford the corresponding methyl ketones. This strategy gives the Markovnikov (ketone) addition product selectively over other possible products. The essential role of hydrogen bonding has been confirmed by experimental and theoretical techniques. A probable mechanism has been suggested by various control tests. The efficacy of the method has been further explored for the competent production of value-added α,β-unsaturated carbonyl compounds through the reaction of aldehydes with alkynes as ketonic surrogates. The environmentally benign hydration method takes place under mild conditions, has broad functional-group compatibility, and uses the ethyl lactate/water (1:3) medium as a “green alternative” in the absence of any hazardous, harmful, or expensive substances.
- Dandia, Anshu,Saini, Pratibha,Chithra,Vennapusa, Sivaranjana Reddy,Parewa, Vijay
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- Synthesis, molecular docking and α-glucosidase inhibitory activity study of 2,4,6-triaryl pyrimidine derivatives
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Background: α-Glucosidase inhibitors hinder the carbohydrate digestion and play an important role in the treatment of diabetes mellitus. α-glucosidase inhibitors available on the market are acarbose, miglitol, and voglibose. However, the use of acarbose is diminishing due to related side effects like diarrhea, bloating and abdominal distension. Objectives: This study aimed to synthesize 2,4,6-triaryl pyrimidines derivatives, screen their α-glucosidase inhibitory activity, perform kinetic and molecular docking studies. Methods: A series of 2,4,6-triaryl pyrimidine derivatives were synthesized and their α-glucosidase inhibitory activity was screened in vitro. Pyrimidine derivatives 4a-m were synthesized via a two-step reaction with a yield between 49 and 93%. The structure of the synthesized compounds was confirmed by different spectroscopic techniques (IR, NMR and MS). The in vitro α-glucosidase inhibition activities of the synthesized compounds 4a-m was also evaluated against Saccharomyces cerevisiae α-glucosidase. Results and Discussion: The majority of synthesized compounds had α-glucosidase inhibitory activity. Particularly compounds 4b and 4g were the most active compounds with an IC50 value of 125.2± 7.2 and 139.8 ± 8.1 μM respectively. The kinetic study performed for the most active compound 4b revealed that the compound was a competitive inhibitor of Saccharomyces cerevisiae α-glucosidase with Ki of 122 μM. The molecular docking study also revealed that the two compounds have important binding interactions with the enzyme active site. Conclusion: 2,4,6-triarylpyrimidine derivative 4a-m were synthesized and screened for α-glucosidase inhibitory activity. Most of the synthesized compounds possess α-glucosidase inhibitory activity, and compound 4b demonstrated the most significant inhibitory action as compared to acarbose.
- Abdollahi, Mohammad,Amini, Mohsen,Bule, Mohammed Hussen,Esfandyari, Roghaieh,Faramarzi, Mohammad Ali,Tafesse, Tadesse Bekele
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p. 1216 - 1226
(2020/10/06)
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- Environment Friendly Synthesis of N′-(1,3-Diphenylallylidene)-1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carbohydrazides: Crystal Structure and Their Anti-oxidant Potential
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An environment friendly synthesis of novel hybrid pharmacophores derived from synergism of nalidixic acid and 1,3-diphenylprop-2-en-1-ones is described. Percent yield and reaction times of microwave assisted reactions have been compared with the reactions
- Mubarak, Shafaq,Zia-Ur-Rehman, Muhammad,Jamil, Nadia,Zaheer, Muhammad,Arshad, Muhammad Nadeem,Asiri, Abdullah Mohammad
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p. 1191 - 1200
(2019/11/19)
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- Synthesis of stable benzimidazole derivatives bearing pyrazole as anticancer and EGFR receptor inhibitors
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A new series of benzimidazole linked pyrazole derivatives were synthesized by cyclocondensation reaction through one-pot multicomponent reaction in absolute ethanol. All the synthesized compounds were tested for their in vitro anticancer activities on fiv
- Akhtar, Md. Jawaid,Khan, Ahsan Ahmed,Ali, Zulphikar,Dewangan, Rikeshwer Prasad,Rafi, Md.,Hassan, Md. Quamrul,Akhtar, Md. Sayeed,Siddiqui, Anees Ahmad,Partap, Sangh,Pasha, Santosh,Yar, M. Shahar
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p. 158 - 169
(2018/03/24)
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- Monoamine Oxidase Inhibitory Activity: Methyl- versus Chlorochalcone Derivatives
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Numerous studies have shown that chalcones are promising scaffolds for the development of new monoamine oxidase-B (MAO-B) inhibitors. As a continuation of our ongoing research into the development of reversible human MAO-B (hMAO-B) inhibitors, two series
- Mathew, Bijo,U?ar, Gülberk,Mathew, Githa Elizabeth,Mathew, Sincy,Kalatharakkal Purapurath, Praseedha,Moolayil, Fasil,Mohan, Smrithy,Varghese Gupta, Sheeba
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p. 2649 - 2655
(2016/12/23)
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- Monitoring the DNA by ruthenium complexes of heterocyclic N,S-donor ligands and evaluation of biological activities
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Neutral N,S-donor bidentate ligands have been synthesized and characterized by NMR and IR spectroscopic techniques. The ligands have been used to synthesized ruthenium(II) complexes ([Ru(L1–L6)PPh3)2Cl2/su
- Karia, Parag S.,Vekariya, Pankajkumar A.,Patidar, Anshul P.,Patel, Ravi R.,Patel, Mohan N.
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p. 1903 - 1914
(2016/10/21)
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- Discovery and Pharmacophore Studies of Novel Pyrazole-Based Anti-Melanoma Agents
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Due to the rising incidence and lack of effective treatments, malignant melanoma is the most dangerous form of skin cancer, so that new treatment strategies are urgently needed. Several recent developments indicate that the V600E mutant BRAF (BRAFV60
- Li, Qing-Shan,Lü, Xian-Hai,Yang, Yang,Ruan, Ban-Feng,Yao, Ri-Sheng,Liao, Chen-Zhong
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p. 116 - 132
(2015/10/19)
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- DNA interaction and cytotoxic activities of square planar platinum(II) complexes with N, S-donor ligands
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The platinum(II) complexes with N, S-donor ligands have been synthesized and characterized by physicochemical methods viz. elemental, electronic, FT-IR, 1H NMR and LC-MS spectra. The binding mode and potency of the complexes with HS DNA (Herrin
- Patel, Mohan N.,Patel, Chintan R.,Joshi, Hardik N.,Thakor, Khyati P.
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supporting information
p. 261 - 267
(2014/04/03)
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- Cytotoxic, antibacterial and nucleic acid interaction studies of square planar palladium(II) complexes
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A series of substituted N, O-donor bidentate ligands(Ln) and their square planar mononuclear palladium(II) complexes of the type [PdCl 2(Ln)] were synthesized and characterized by elemental analysis, conductivity measureme
- Patel, Mohan N.,Patidar, Anshul P.,Karia, Parag S.,Vekariya, Pankaj A.
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- Design, synthesis and biological evaluation of pyrazolyl-thiazolinone derivatives as potential EGFR and HER-2 kinase inhibitors
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A series of pyrazolyl-thiazolinone derivatives (E1-E36) have been designed and synthesized and their biological activities were also evaluated as potential EGFR and HER-2 kinase inhibitors. Thirty-four of the 36 compounds were reported for the first time. Among them, compound 2-(5-(4-bromophenyl)-3-p-tolyl-4,5- dihydro-1H-pyrazol-1-yl)thiazol-4(5H)-one (E28) displayed the most potent inhibitory activity (IC50 = 0.24 μM for EGFR and IC50 = 1.07 μM for HER-2). Antiproliferative assay results indicated that compound E28 owned high antiproliferative activity against MCF-7, B16-F10 and HCT-116 in vitro, with IC50 value of 0.30, 0.54, and 0.70 μM, respectively. Docking simulation was further performed to position compound E28 into the EGFR active site to determine the probable binding model. Based on the preliminary results, compound E28 with potent inhibitory activity in tumor growth would be a potential anticancer agent.
- Qiu, Ke-Ming,Wang, Hai-Hong,Wang, Li-Ming,Luo, Yin,Yang, Xian-Hui,Wang, Xiao-Ming,Zhu, Hai-Liang
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experimental part
p. 2010 - 2018
(2012/05/04)
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- Cytotoxic, DNA interaction, SOD mimic, and antimicrobial activities of square pyramidal copper(II) complexes
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The copper(II) complexes with NS donor ligand and ciprofloxacin were synthesized. The synthesized complexes were characterized by physicochemical parameters like elemental and thermal analysis, electronic, FT-IR, and LC-MS spectroscopy. The complexes were
- Patel, Mohan N.,Patel, Chintan R.,Joshi, Hardik N.
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scheme or table
p. 1224 - 1232
(2012/08/13)
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- Synthesis, biological evaluation and 3D-QSAR studies of novel 4,5-dihydro-1H-pyrazole niacinamide derivatives as BRAF inhibitors
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A series of novel 4,5-dihydropyrazole derivatives containing niacinamide moiety as potential V600E mutant BRAF kinase (BRAFV600E) inhibitors were designed and synthesized. Results of the bioassays against BRAF V600E and WM266.4 human
- Li, Cui-Yun,Li, Qing-Shan,Yan, Li,Sun, Xiao-Guang,Wei, Ran,Gong, Hai-Bin,Zhu, Hai-Liang
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experimental part
p. 3746 - 3755
(2012/08/28)
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- Synthesis, characterization and pharmacological study of 4,5-dihydropyrazolines carrying pyrimidine moiety
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A series of 5-bromo-2-(3,5-diaryl-4,5-dihydro-1H-pyrazol-1-yl)pyrimidine were prepared under conventional heating as well as microwave reaction condition. The newly synthesized compounds were characterized on the basis of elemental, spectral and single crystal X-ray studies. These new compounds were screened for their antioxidant, anti-inflammatory and analgesic activities. Some of these compounds exhibited potent biological activities compared to the standard drug.
- Adhikari, Adithya,Kalluraya, Balakrishna,Sujith, Kizhakke Veedu,Gouthamchandra, Kuluvar,Jairam, Ravikumar,Mahmood, Riaz,Sankolli, Ravish
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p. 467 - 474
(2012/11/07)
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- Design, synthesis, and structure-activity relationships of pyrazole derivatives as potential FabH inhibitors
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Fatty acid biosynthesis is essential for bacterial survival. FabH, β-ketoacyl-acyl carrier protein (ACP) synthase III, is a particularly attractive target, since it is central to the initiation of fatty acid biosynthesis and is highly conserved among Gram-positive and -negative bacteria. Fifty-six 1-acetyl-3,5-diphenyl-4,5-dihydro-(1H)-pyrazole derivatives were synthesized and developed as potent inhibitors of FabH. This inhibitor class demonstrates strong antibacterial activity. Escherichia coli FabH inhibitory assay and docking simulation indicated that the compounds 1-(5-(4-fluorophenyl)- 3-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)ethanone (12) and 1-(5-(4-chlorophenyl)-3-(4-methoxyphenyl)-4,5-dihydro-1H-pyrazol-1-yl)ethanone (13) were potent inhibitors of E. coli FabH.
- Lv, Peng-Cheng,Sun, Juan,Luo, Yin,Yang, Ying,Zhu, Hai-Liang
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scheme or table
p. 4657 - 4660
(2010/09/16)
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- Synthesis and characterization of some new 2-amino-4-(4′-substituted) -6-(4″-substituted)diphenyl pyrimidines
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Synthesis and characterization of some novel 2-amino-4-(4′- substituted)-6-(4″-substituted)diphenyl pyrimidines has been carried out by the conversion of variably substituted acetophenones and benzaldehydes into corresponding chalcones followed by cyclization with guanidine hydrochloride in the presence of an oxidizing agent.
- Hasan, Aurangzeb,Khaleeq, Musfirah,Riaz, Uzma
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scheme or table
p. 5581 - 5587
(2012/08/07)
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