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Thirupataiah B, Mounika G, Sujeevan Reddy G, Sandeep Kumar J, Kapavarapu R, Medishetti R, Mudgal J, Mathew JE, Shenoy GG, Mallikarjuna Rao C, Chatti K, V L Parsa K, Pal M. CuCl 2-catalyzed inexpensive, faster and ligand/additive free synthesis of isoquinolin-1(2H)-one derivatives via the coupling-cyclization strategy: Evaluation of a new class of compounds as potential PDE4 inhibitors. Bioorg Chem 2021; 115:105265. [PMID: 34426160 DOI: 10.1016/j.bioorg.2021.105265] [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: 06/25/2021] [Revised: 08/03/2021] [Accepted: 08/08/2021] [Indexed: 12/13/2022]
Abstract
In spite of possessing a wide range of pharmacological properties the anti-inflammatory activities of isoquinolin-1(2H)-ones were rarely known or explored earlier. PDE4 inhibitors on the other hand in addition to their usefulness in treating inflammatory diseases have been suggested to attenuate the cytokine storm in COVID-19 especially TNF-α. In our effort, a new class of isoquinolin-1(2H)-ones derivatives containing an aminosulfonyl moiety were designed and explored as potential inhibitors of PDE4. Accordingly, for the first time a CuCl2-catalyzed inexpensive, faster and ligand/additive free approach has been developed for the synthesis of these predesigned isoquinolin-1(2H)-one derivatives via the coupling-cyclization strategy. Thus, the CuCl2-catalyzed reaction of 2-iodobenzamides with appropriate terminal alkynes proceeded with high chemo and regioselectivity affording the desired compounds in 77-84% yield within 1-1.5 h. The methodology also afforded simpler isoquinolin-1(2H)-ones devoid of aminosulfonyl moiety showing a broader generality and scope of this approach. Several of the synthesized compounds especially 3c, 3k and 3s showed impressive inhibition (83-90%) of PDE4B when tested at 10 µM in vitro whereas compounds devoid of aminosulfonyl moiety was found to be less active. In spite of high inhibition showed at 10 µM these compounds did not show proper concertation dependent inhibition below 1 µM that was reflected in their IC50 values e.g. 2.43 ± 0.32, 3.26 ± 0.24 and 3.63 ± 0.80 µM for 3k, 3o and 3s respectively. The anti-inflammatory potential of these compounds was indicated by their TNF-α inhibition (60-50% at 10 µM). The in silico docking studies of these molecules suggested good interactions with PDE4B and selective inhibition of PDE4B by 3k over PDE4D that was supported by in vitro assay results. These observations together with the favorable ADME and safety predicted for 3kin silico not only suggested 3k as an interesting hit molecule for further studies but also reveal the first example of isoquinolin-1(2H)-one based inhibitor of PDE4B.
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Affiliation(s)
- B Thirupataiah
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India; Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Guntipally Mounika
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India
| | - Gangireddy Sujeevan Reddy
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India; Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Jetta Sandeep Kumar
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India; Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Ravikumar Kapavarapu
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India
| | - Raghavender Medishetti
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India; Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Jayesh Mudgal
- Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Jessy E Mathew
- Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Gautham G Shenoy
- Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - C Mallikarjuna Rao
- Manipal College of Pharmaceutical Sciences Manipal Academy of Higher Education, Madhav Nagar, Manipal 576 104, Karnataka, India
| | - Kiranam Chatti
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India
| | - Kishore V L Parsa
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India
| | - Manojit Pal
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India.
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Ahmed M, Naseer MM. Organolithium-mediated cyclization reactions: a practical way to access hetero- and carbocycles. NEW J CHEM 2017. [DOI: 10.1039/c7nj01763d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclization reactions are considered as one of the most important reactions in organic synthesis due to the fact that natural molecules contain cyclic components either as part of the molecule or molecular skeleton.
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Affiliation(s)
- Mukhtiar Ahmed
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad 45320
- Pakistan
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Anam F, Abbas A, Lo KM, Hameed S, Ramasami P, Umar Y, Ullah A, Naseer MM. Synthesis, crystal structure, experimental and theoretical investigations of 3-(4-ethoxy-3-methoxyphenyl)-1-phenylprop-2-en-1-one. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hameed A, Shafiq Z, Yaqub M, Hussain M, Hussain MA, Afzal M, Tahir MN, Naseer MM. Me3N-promoted synthesis of 2,3,4,4a-tetrahydroxanthen-1-one: preparation of thiosemicarbazone derivatives, their solid state self-assembly and antimicrobial properties. NEW J CHEM 2015. [DOI: 10.1039/c5nj01879j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiosemicarbazones (5a–5j) have been synthesized from 2,3,4,4a-tetrahydroxanthen-1-one, obtained in high yield through Me3N-promoted domino Baylis–Hillman/oxa-Michael reaction. Their solid-state self-assembly and antimicrobial properties are studied.
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Affiliation(s)
- Aminah Hameed
- Institute of Chemical Sciences
- Organic Chemistry Division
- Bahauddin Zakariya University
- Multan 60800
- Pakistan
| | - Zahid Shafiq
- Institute of Chemical Sciences
- Organic Chemistry Division
- Bahauddin Zakariya University
- Multan 60800
- Pakistan
| | - Muhammad Yaqub
- Institute of Chemical Sciences
- Organic Chemistry Division
- Bahauddin Zakariya University
- Multan 60800
- Pakistan
| | - Mazhar Hussain
- Institute of Chemical Sciences
- Organic Chemistry Division
- Bahauddin Zakariya University
- Multan 60800
- Pakistan
| | | | - Muhammad Afzal
- Department of Chemistry
- University of Sargodha
- Sargodha
- Pakistan
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