1
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Rana S, Shaw R, Pratap R. Influence of steric hindrance on the 1,4- versus 1,6-Michael addition: synthesis of furans and pentasubstituted benzenes. Org Biomol Chem 2024; 22:5361-5373. [PMID: 38869426 DOI: 10.1039/d4ob00686k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
We described the influence of steric hindrance on the 1,4- versus 1,6-Michael addition reaction on 2-(3,3-bis(methylthio)-1-arylallylidene)malononitriles. An efficient and direct synthesis of trisubstituted furans was achieved through the reaction of 2-(3,3-bis(methylthio)-1-arylallylidene)malononitriles and acetone under mild conditions in good to moderate yield by the 1,4-Michael addition. Further exploration of the reaction with a sterically hindered aryl group containing 2-(3,3-bis(methylthio)-1-arylallylidene)malononitriles afforded biaryls by an in situ generated nucleophile through the 1,6-Michael addition. The synthetic utility of furan is further explored. These precursors are easily accessible from aryl methyl ketones. Various functional groups like alkyl, aryl, nitrile, amine, aroyl, and thiomethyl can be directly installed in the benzene and furan rings. A one-pot approach for the construction of a benzene nucleus was also developed. The structure of two compounds was confirmed by X-ray crystallography.
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Affiliation(s)
- Shally Rana
- Department of Chemistry, University of Delhi, North Campus, Delhi-110007, India.
- Department of Chemistry, School of Science Indrashil University, Rajpur, Kadi, Ahmedabad-Mehsana Highway, Gujarat, 382740, India
| | - Ranjay Shaw
- Department of Chemistry, GLA University, Mathura, 281406, India
| | - Ramendra Pratap
- Department of Chemistry, University of Delhi, North Campus, Delhi-110007, India.
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2
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Dwivedi GR, Rai R, Pratap R, Singh K, Pati S, Sahu SN, Kant R, Darokar MP, Yadav DK. Drug resistance reversal potential of multifunctional thieno[3,2-c]pyran via potentiation of antibiotics in MDR P. aeruginosa. Biomed Pharmacother 2021; 142:112084. [PMID: 34449308 DOI: 10.1016/j.biopha.2021.112084] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 08/17/2021] [Indexed: 10/20/2022] Open
Abstract
We explored the antibacterial potential (alone and combination) against multidrug resistant (MDR) Pseudomonas aeruginosa isolates KG-P2 using synthesized thieno[3,2-c]pyran-2-ones in combination with different antibiotics. Out of 14 compounds, two compounds (3g and 3l) abridged the MIC of tetracycline (TET) by 16 folds. Compounds was killing the KG-P2 cells, in time dependent manner, lengthened post-antibiotic effect (PAE) of TET and found decreased the mutant prevention concentration (MPC) of TET. In ethidium bromide efflux experiment, two compounds repressed the drug transporter (efflux pumps) which is further supported by molecular docking of these compounds with efflux complex MexAB-OprM. In another study, these compounds inhibited the synthesis of biofilm.
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Affiliation(s)
- Gaurav Raj Dwivedi
- Microbiology Department, ICMR-Regional Medical Research Centre, BRD Medical College Campus, Gorakhpur 273013, India.
| | - Reeta Rai
- Department of Biochemistry, AIIMS Ansari Nagar, New Delhi 110029, India
| | - Ramendra Pratap
- Department of Chemistry, North campus University of Delhi, Delhi 110007, India.
| | - Khusbu Singh
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Sanghamitra Pati
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Satya Narayan Sahu
- Government College Balrampur, Balrampur-Ramanujganj, Chhattisgarh 497119, India
| | - Rajni Kant
- Microbiology Department, ICMR-Regional Medical Research Centre, BRD Medical College Campus, Gorakhpur 273013, India
| | - Mahendra P Darokar
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, ̥Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India
| | - Dharmendra K Yadav
- Gachon Institute of Pharmaceutical Science and Department of Pharmacy, College of Pharmacy, Gachon University, 191 Hambakmoeiro, Yeonsu-gu, Incheon 21924, Republic of Korea.
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3
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Elagamy A, Shaw R, Shah C, Pratap R. Iodine-Mediated Synthesis of 2-(Methylthio)-4 H-chromen-4-ones and Study of Their Halogenation Reactions. J Org Chem 2021; 86:9478-9489. [PMID: 34232643 DOI: 10.1021/acs.joc.1c00788] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient iodine-mediated method is developed for the synthesis of functionalized 2-(methylthio)-4H-chromen-4-ones by intramolecular cyclization of easily accessible 1-(2-benzyloxy-aryl)-3,3-bis-methylsulfanyl-propenones. The synthesized chromen-4-ones turn out to be a key precursor for various kinds of chemical reactions. Mechanistically, we observed that iodine-mediated intramolecular cyclization of ketene dithioacetal proceeded through a radical pathway. 3-Halo-2-(methylthio)-4H-chromen-4-ones were achieved via various two- or one-pot halogenation approaches.
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Affiliation(s)
- Amr Elagamy
- Department of Chemistry, University of Delhi, North Campus, Delhi, India, 110007
| | - Ranjay Shaw
- Department of Chemistry, University of Delhi, North Campus, Delhi, India, 110007
| | - Chandan Shah
- Department of Chemistry, University of Delhi, North Campus, Delhi, India, 110007
| | - Ramendra Pratap
- Department of Chemistry, University of Delhi, North Campus, Delhi, India, 110007
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4
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Raj Dwivedi G, Khwaja S, Singh Negi A, Panda SS, Swaroop Sanket A, Pati S, Chand Gupta A, Bawankule DU, Chanda D, Kant R, Darokar MP. Design, synthesis and drug resistance reversal potential of novel curcumin mimics Van D: Synergy potential of curcumin mimics. Bioorg Chem 2021; 106:104454. [PMID: 33213895 DOI: 10.1016/j.bioorg.2020.104454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/03/2020] [Accepted: 11/01/2020] [Indexed: 12/29/2022]
Abstract
Being crucial part of plant-based novel discovery of drug from natural resources, a study was done to explore the antibacterial potential of curcumin mimics in combination with antibiotics against multidrug resistant isolates of Pseudomonas aeruginosa. The best candidate Van D, a curcumin mimics reduced the MIC of tetracycline (TET) up to 16 folds against multidrug resistant clinical isolates. VanD further inhibited the efflux pumps as evident by ethidium bromide efflux and by in-silico docking studies. In another experiment, it was also found that Van D inhibits biofilm synthesis. This derivative kills the KG-P2, an isolate of P. aeruginosa in a time dependent manner, the post-antibiotic effect (PAE) of tetracycline was extended as well as mutant prevention concentration (MPC) of TET was also decreased. In Swiss albino mice, Van D reduced the proinflammatory cytokines concentration. In acute oral toxicity study, this derivative was well tolerated and found to be safe up to 1000 mg/kg dose. To the best of our knowledge, this is the first report on curcumin mimics as synergistic agent via inhibition of efflux pump.
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Affiliation(s)
- Gaurav Raj Dwivedi
- Microbiology Department, ICMR-Regional Medical Research Centre, Gorakhpur 273013, Uttar Pradesh, India.
| | - Sadiya Khwaja
- Phytochemistry Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Arvind Singh Negi
- Phytochemistry Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Swati S Panda
- ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - A Swaroop Sanket
- ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Sanghamitra Pati
- ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Amit Chand Gupta
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India
| | - Dnyaneshwar Umrao Bawankule
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Debabrata Chanda
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajni Kant
- Microbiology Department, ICMR-Regional Medical Research Centre, Gorakhpur 273013, Uttar Pradesh, India
| | - Mahendra P Darokar
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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5
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Panwar R, Althagafi I, Shally, Shaw R, Elagamy A, Shah C, Yadav P, Pratap R. Transition metal free synthesis of multifunctional thiomethylated-benzenes from aryl/heteroaryl/cyclopropyl methyl ketones. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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6
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Rai R, Dutta RK, Singh S, Yadav DK, Kumari S, Singh H, Gupta RD, Pratap R. Synthesis, biological evaluation and molecular docking study of 1-amino-2-aroylnaphthalenes against prostate cancer. Bioorg Med Chem Lett 2018; 28:1574-1580. [PMID: 29606573 DOI: 10.1016/j.bmcl.2018.03.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/10/2018] [Accepted: 03/21/2018] [Indexed: 11/27/2022]
Abstract
A series of functionalized naphthalene was synthesized and screened against human prostate cancer cell line (PC-3). The in vitro antiproliferative activity of the synthesized compounds was evaluated by monitoring their cytotoxic effects against PC-3 cells by using MTT assay. We observed that compound 5f resulted in more than 50% cell death at 14 µM. Treatment of PC-3 cells with 5f provides apoptosis by flow cytometry. Western blotting showed decreased expression of pro-caspase 8 and 9. Our study shows that cancer cell treated with 5f has higher concentration of reactive oxygen species as compare to untreated sample, which facilitate cancerous cell to enter apoptosis. Exact mechanism by which ROS is generated after 5f treatment is still under study. Molecular docking study further strengthens the results obtained from in vitro experiments. Compound 5f can be considered as a promising leads for anticancer agent against prostate cancer cells due to its potent cytotoxic activity and apoptotic effect.
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Affiliation(s)
- Reeta Rai
- Department of Biochemistry, AIIMS, Ansari Nagar, New Delhi 110029, India
| | - Roshan Kumar Dutta
- Faculty of Life Sciences and Biotechnology, South Asian University, New Delhi 110021, India
| | - Surjeet Singh
- Department of Chemistry, University of Delhi, North Campus, Delhi 110007, India
| | | | - Seema Kumari
- Biochemistry Division, Central Drug Research Institute, Lucknow 226001, U.P., India
| | - Harpreet Singh
- Indian Council of Medical Research, Ansari Nagar, New Delhi 110029, India
| | - Rinkoo Devi Gupta
- Faculty of Life Sciences and Biotechnology, South Asian University, New Delhi 110021, India
| | - Ramendra Pratap
- Department of Chemistry, University of Delhi, North Campus, Delhi 110007, India.
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7
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Thimmarayaperumal S, Shanmugam S. Base-Promoted Selective Synthesis of 2 H-Pyranones and Tetrahydronaphthalenes via Domino Reactions. ACS OMEGA 2017; 2:4900-4910. [PMID: 31457769 PMCID: PMC6641896 DOI: 10.1021/acsomega.7b00627] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 06/29/2017] [Indexed: 06/10/2023]
Abstract
A highly efficient domino protocol has been developed for the synthesis of 6-aryl-4-(methylthio/amine-1-yl)-2-oxo-2H-pyran-3-carbonitriles and 4-aryl-2-(amine-1-yl)-5,6,7,8-tetrahydronaphthalene-1-carbonitriles from simple and readily available α-aroylketene dithioacetals, malononitrile, secondary amines, and cyclohexanone. This elegant domino process involved consecutive addition-elimination, intramolecular cyclization, and ring opening and closing sequences. Notably, in situ generated 2-imino-4-(methylthio/amine-1-yl)-6-aryl-2H-pyran-3-carbonitrile plays multiple roles in the construction of various novel polyaromatic hydrocarbons.
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8
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Synthesis of arylated and aminated naphthalenes and their synthetic applications for aza-heterocycles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Singh S, Reddy TS, Panwar R, Misra R, Pratap R. 2-(2,2-Bis-benzylamino-1-cyano-vinyl)-benzonitrile: A Selective Turn-off Fluorescent Cu2+Sensor. ChemistrySelect 2016. [DOI: 10.1002/slct.201600504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Surjeet Singh
- Department of Chemistry; University of Delhi; North Campus Delhi- 110007 India
| | - T. Sheshashena Reddy
- Department of Chemistry; Indian Institute of Technology; Indore Madhya Pradesh India
| | - Rahul Panwar
- Department of Chemistry; University of Delhi; North Campus Delhi- 110007 India
| | - Rajneesh Misra
- Department of Chemistry; Indian Institute of Technology; Indore Madhya Pradesh India
| | - Ramendra Pratap
- Department of Chemistry; University of Delhi; North Campus Delhi- 110007 India
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10
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Janni M, Arora S, Peruncheralathan S. Double heteroannulation of S,N-acetals: a facile access to quinolone derivatives. Org Biomol Chem 2016; 14:8781-8788. [PMID: 27714234 DOI: 10.1039/c6ob01568a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A library of 3-aryl-4-quinolones and their benzo-fused heterocycles was synthesized from single S,N-acetal precursors.
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Affiliation(s)
- Manojkumar Janni
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Khurda – 752050
- India
| | - Sahil Arora
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Khurda – 752050
- India
| | - S. Peruncheralathan
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Khurda – 752050
- India
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