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Chong YK, Ong YS, Yeong KY. Unveiling sultam in drug discovery: spotlight on the underexplored scaffold. RSC Med Chem 2024; 15:1798-1827. [PMID: 38911171 PMCID: PMC11187559 DOI: 10.1039/d3md00653k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 04/14/2024] [Indexed: 06/25/2024] Open
Abstract
Decades ago, the application of cyclic sulfonamide (sultam) and its derivatives primarily focused on their antibacterial properties. However, recent years have seen a shift in research attention towards exploring their potential as anticancer, anti-inflammatory, antidiabetic, and antiviral agents. Despite this broadening scope, only a few sultam drugs have made it to the commercial market, as much of the research on sultams remains in the discovery phase. This class of compounds holds significant promise and remains pertinent in pharmaceutical research. Due to sultam's relevance and growing importance in drug discovery, this review paper aims to consolidate and examine the biological activities of sultam derivatives ranging from 4 to 8-membered ring structures.
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Affiliation(s)
- Yie Kie Chong
- School of Science, Monash University Malaysia Campus Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| | - Yee Swen Ong
- School of Science, Monash University Malaysia Campus Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
| | - Keng Yoon Yeong
- School of Science, Monash University Malaysia Campus Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia
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2
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Fatima M, Siddiqui WA, Choudhary MI, Ashraf A, Niaz S, Raza MA, Alam SM, Ashfaq M, Tahir MN, Dahlous KA. Synthesis of dimeric 1,2-benzothiazine 1,1-dioxide scaffolds: molecular structures, Hirshfeld surface analysis, DFT and enzyme inhibition studies. RSC Adv 2024; 14:16935-16944. [PMID: 38808235 PMCID: PMC11130764 DOI: 10.1039/d4ra02009j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/20/2024] [Indexed: 05/30/2024] Open
Abstract
1,2-Benzothiazines are bioactive compounds with diverse pharmacological properties. We report here the synthesis of a series of dimers containing 1,2-benzothiazine scaffolds as potential pharmacophores. The characterization of compounds was done using analytical techniques such as FT-IR, 1H NMR, and elemental analyses. The molecular structures of the compounds (5-8) were confirmed by X-ray crystallography. The molecular interactions in compounds (5-8) were determined by Hirshfeld Surface Analysis (HSA). Density functional theory (DFT) investigations were carried out to calculate vibrational properties, NMR behaviour, dipole moments, molecular electrostatic potential (MEP), frontier molecular orbital (FMO), natural bonding orbital (NBO) analysis and global reactivity descriptors. The global reactivity descriptors indicated the charge transfer reactions and stabilized as follows: 8 > 7 > 6 > 5. In FMO analysis a substantial HOMO-LUMO gap, ranging from 4.43 to 5.12 eV, with high LUMO values was observed for all compounds, while the highest value for linear polarizability was found in compound 8. The in vitro and in silico studies confirm that compound 8 is more active toward AChE and BChE enzymes.
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Affiliation(s)
- Muqudis Fatima
- Institute of Chemistry, University of Sargodha Sargodha 40100 Pakistan
| | | | - Muhammad Iqbal Choudhary
- International Center for Chemical and Biological Sciences, H. E. J Research Institute of Chemistry, University of Karachi Karachi Pakistan
| | - Adnan Ashraf
- Department of Chemistry, The University of Lahore Lahore Pakistan
| | - Shanawer Niaz
- Department of Physics, Thal University Bhakkar Bhakkar 30000 Pakistan
| | | | - Seikh Mafiz Alam
- Department of Chemistry, Aliah University New Town Kolkata 700 156 India
| | - Muhammad Ashfaq
- Department of Physics, University of Sargodha Sargodha-40100 Pakistan
| | | | - Kholood Ahmed Dahlous
- Department of Chemistry, College of Science, King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia
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3
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Amin A, Khazir ZU, Ji A, Bhat BA, Murtaza D, Hurrah AA, Bhat IA, Parveen S, Nisar S, Sharma PK. Anti-lung Cancer Activity of Synthesized Substituted 1,4-Benzothiazines: An Insight from Molecular Docking and Experimental Studies. Anticancer Agents Med Chem 2024; 24:358-371. [PMID: 37957911 DOI: 10.2174/0118715206276737231103114924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/10/2023] [Accepted: 10/18/2023] [Indexed: 11/15/2023]
Abstract
BACKGROUND Thiazine, a 6-membered distinctive heterocyclic motif with sulfur and nitrogen atoms, is one of the heterocyclic compounds that functions as a core scaffold in a number of medicinally significant molecules. Small thiazine-based compounds may operate simultaneously on numerous therapeutic targets and by employing a variety of methods to halt the development, proliferation, and vasculature of cancer cells. We have, herein, reported a series of substituted 1,4 benzothiazines as potential anticancer agents for the treatment of lung cancer. METHODS In order to synthesize 2,3-disubstituted-1,4 benzothiazines in good yield, a facile green approach for the oxidative cycloaddition of 2-amino benzenethiol and 1,3-dicarbonyls employing a catalytic amount of ceric ammonium nitrate has been devised. All the molecules have been characterized by spectral analysis and tested for anticancer activity against the A-549 lung cancer cell line using various functional assays. Further in silico screening of compound 3c against six crucial inflammatory molecular targets, such as Il1-α (PDB ID: 5UC6), Il1- β (PDB ID: 6Y8I), Il6 (PDB ID: 1P9M), vimentin (PDB ID: 3TRT), COX-2 (PDB ID: 5KIR), Il8 (PDB ID: 5D14), and TNF-α (PDB ID: 2AZ5), was done using AutoDock tool. RESULTS Among the synthesized compounds, propyl 3-methyl-3,4-dihydro-2H-benzo[b][1,4]thiazine-2- carboxylate (3c) was found to be most active based on cell viability assays using A-549 lung cancer cell line and was found to effectively downregulate various pro-inflammatory genes, like Il1-α, Il1-β, Il6, vimentin, COX-2, Il8, and TNF-α in vitro. The ability of the molecule to effectively suppress the proliferation and migration of lung cancer cells in vitro has been further demonstrated by the colony formation unit assay and wound healing assay. Molecular docking analysis showed the maximal binding affinity (- 7.54 kcal/mol) to be exhibited by compound 3c against IL8. CONCLUSION A green unconventional route for the synthesis of 2,3-disubstituted-1,4 benzothiazines has been developed. All the molecules were screened for their activity against lung cancer and the data suggested that the presence of an additional unbranched alkyl group attached to the thiazine ring increased their activity. Also, in vitro and in silico modeling confirmed the anti-cancer efficiency of compound 3c, encouraging the exploration of such small molecules against cancer.
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Affiliation(s)
- Andleeb Amin
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India
- Transcriptomics Laboratory, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, J&K, 190025, India
| | - Zubaid-Ul- Khazir
- Transcriptomics Laboratory, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, J&K, 190025, India
- Department of Chemistry, National Institute of Technology, Hazratbal, Srinagar, J&K, 190006, India
| | - Arfa Ji
- Transcriptomics Laboratory, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, J&K, 190025, India
- Laboratory of Nanotherapeutics and Regenerative Medicine, Department of Nanotechnology, University of Kashmir, Srinagar, J&K, 190006, India
| | - Basharat Ahmad Bhat
- Department of Bioresources, School of Biological Sciences, University of Kashmir, J&K, 190006, India
| | - Dar Murtaza
- Transcriptomics Laboratory, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, J&K, 190025, India
| | - Aaqib A Hurrah
- Transcriptomics Laboratory, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology, Shalimar, Srinagar, J&K, 190025, India
| | - Imtiyaz A Bhat
- Department of Endocrinology, Sher-e-Kashmir Institute of Medical Sciences, Soura, Srinagar, J&K, 190011, India
| | - Shaheena Parveen
- Department of Gastroenterology, Sher-e-Kashmir Institute of Medical Sciences, Soura, Srinagar, J&K, 190011, India
| | - Syed Nisar
- Department of Medical Oncology, Sher-e-Kashmir Institute of Medical Sciences, Soura, Srinagar, J&K, 190011, India
| | - Praveen Kumar Sharma
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, Punjab, 144411, India
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4
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Ratan Y, Rajput A, Pareek A, Jain V, Pareek A, Gupta MM, Kamal MA. Green Synthetic Strategies and Pharmaceutical Applications of Thiazine and its Derivatives: An Updated Review. Curr Pharm Biotechnol 2024; 25:1142-1166. [PMID: 37694776 DOI: 10.2174/1389201025666230908141543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 07/02/2023] [Accepted: 07/24/2023] [Indexed: 09/12/2023]
Abstract
Thiazines are a sizable class of organic heterocycles that are notable for their skeletal versatility and relative chemical simplicity, making them among the most flexible sources of biologically active compounds. The term "green synthesis" refers to implementing energy-efficient procedures for the nature-friendly production of materials and chemicals using green solvents, catalysts, and suitable reaction conditions. Considering the importance of green chemistry and the outstanding therapeutic profile of thiazines, the present work was designed to review the recent advances in green chemistry-based synthetic strategies of thiazine and its derivatives. The green synthetic approaches, including microwave-assisted, ultrasound-assisted, and various other synthetic methods for thiazine and its derivatives, were discussed and generalized. In addition, applications of thiazine and its derivatives in pharmaceutical sciences were explained with examples of marketed drugs.The discussed sustainable synthetic methods for thiazines and their derivatives could be useful in developing other medicinally important lead molecules. They could also aid in developing new synthetic schemes and apparatuses that may simplify chemical manufacturing processes and enable novel reactions with minimal by-products while questing for optimal, green solvents. This review can help anyone interested in this fascinating class of heterocycles to make decisions about selecting targets and tasks for future research.
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Affiliation(s)
- Yashumati Ratan
- Department of Pharmacy, Banasthali Vidyapith, Banasthali-304022, Rajasthan, India
| | - Aishwarya Rajput
- Department of Pharmacy, Banasthali Vidyapith, Banasthali-304022, Rajasthan, India
| | - Ashutosh Pareek
- Department of Pharmacy, Banasthali Vidyapith, Banasthali-304022, Rajasthan, India
| | - Vivek Jain
- Department of Pharmaceutical Sciences, MLSU, Udaipur-313001, Rajasthan, India
| | - Aaushi Pareek
- Department of Pharmacy, Banasthali Vidyapith, Banasthali-304022, Rajasthan, India
| | - Madan Mohan Gupta
- School of Pharmacy, Faculty of Medical Sciences, The University of the West Indies, St. Augustine, Trinidad & Tobago, WI
| | - Mohammad Amjad Kamal
- Joint Laboratory of Artificial Intelligence in Healthcare, Institutes for Systems Genetics and West China School of Nursing, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka 1207, Bangladesh
- Enzymoics, 7Peterlee place, Hebersham, NSW 2770, Novel Global Community Educational Foundation, Australia
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5
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Aljuaid A, Allahyani M, Alsaiari AA, Almehmadi M, Alsharif A, Asif M. Green Synthetic Methods of Oxazine and Thiazine Scaffolds as Promising Medicinal Compounds: A Mini-review. Curr Org Synth 2024; 21:837-857. [PMID: 37779415 DOI: 10.2174/1570179420666230811092847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/13/2023] [Accepted: 07/12/2023] [Indexed: 10/03/2023]
Abstract
Medical researchers have paid close attention to the green synthesis of oxazine and thiazine derivatives since they provided a lead molecule for the creation of numerous possible bioactive compounds. This review provides more information on green synthesis, which will be very helpful to researchers in creating the most effective, affordable, and clinically significant thiazine and oxazine derivatives that are anticipated to have strong pharmacological effects. This has resulted in the identification of several substances with a wide range of intriguing biological functions. This article's goal is to examine the numerous green chemical processes used to create oxazine and thiazine derivatives and their biological activity. We anticipate that researchers interested in oxazine and thiazine chemicals will find this material to be useful. We anticipate that medicinal chemists looking for new active medicinal components for drug discovery and advance progress will find this review of considerable interest.
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Affiliation(s)
- Abdulelah Aljuaid
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mamdouh Allahyani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Ahad Amer Alsaiari
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mazen Almehmadi
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Abdulaziz Alsharif
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Mohammad Asif
- Department of Pharmaceutical Chemistry, Era College of Pharmacy, Era University, Lucknow, 226003, Uttar Pradesh, India
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Javid N, Jalil S, Munir R, Zia-ur-Rehman M, Sahar A, Arshad S, Iqbal J. 2,1-Benzothiazine - (quinolin/thiophen)yl hydrazone frameworks as new monoamine oxidase inhibitory agents; synthesis, in vitro and in silico investigation. RSC Adv 2023; 13:1701-1710. [PMID: 36712607 PMCID: PMC9828044 DOI: 10.1039/d2ra07045f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 12/23/2022] [Indexed: 01/11/2023] Open
Abstract
Two series of new 2,1-benzothiazine derivatives have been synthesized by condensation of 4-hydrazono-1-methyl-3,4-dihydro-1H-benzo[c][1,2]thiazine 2,2-dioxide (5) with 2-chloroquinoline-3-carbaldehydes and acetylthiophenes to acquire new heteroaryl ethylidenes 7(a-f) and 9(a-k) in excellent yields. After characterization by FTIR, 1H NMR, 13C NMR and elemental analyses, the newly synthesized analogues were investigated against monoamine oxidase enzymes (MAO A and MAO B). The titled compounds exhibited activity in the lower micromolar range among which 9e was the most potent compound against MAO A with IC50 of 1.04 ± 0.01 μM whereas 9h proved to be the most potent derivative against MAO B with an IC50 value of 1.03 ± 0.17 μM. Furthermore, in vitro results were further endorsed by molecular docking studies to determine the interaction between the potent compounds and the enzyme active site. These newly synthesized compounds represent promising hits for the development of safer and potent lead molecules for therapeutic use against depression and other neurological diseases.
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Affiliation(s)
- Noman Javid
- School of Chemistry, University of the PunjabLahore54590Pakistan,Chemistry Department (C-Block), Forman Christian CollegeFerozepur Road LahorePakistan
| | - Saquib Jalil
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad CampusAbbottabad22060Pakistan+92-992-383441+92-992-383591-96
| | - Rubina Munir
- Department of Chemistry, Kinnaird College for WomenLahore 54000Pakistan
| | | | - Amna Sahar
- Department of Chemistry, Kinnaird College for WomenLahore 54000Pakistan
| | - Sara Arshad
- Department of Chemistry, Kinnaird College for WomenLahore 54000Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad CampusAbbottabad22060Pakistan+92-992-383441+92-992-383591-96
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7
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Reetu R, Gujjarappa R, Malakar CC. Recent Advances in Synthesis and Medicinal Evaluation of 1,2‐Benzothiazine Analogues. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Reetu Reetu
- National Institute of Technology Manipur Chemistry INDIA
| | | | - Chandi C Malakar
- National Institute of Technology Manipur Department of Chemistry Langol, Imphal 795004 Imphal INDIA
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8
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Saddique FA, Ahmad M, Ashfaq UA, Muddassar M, Sultan S, Zaki MEA. Identification of Cyclic Sulfonamides with an N-Arylacetamide Group as α-Glucosidase and α-Amylase Inhibitors: Biological Evaluation and Molecular Modeling. Pharmaceuticals (Basel) 2022; 15:106. [PMID: 35056163 PMCID: PMC8777765 DOI: 10.3390/ph15010106] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/31/2021] [Accepted: 01/06/2022] [Indexed: 02/04/2023] Open
Abstract
Diabetes mellitus (DM), a complicated metabolic disorder, is due to insensitivity to insulin function or reduction in insulin secretion, which results in postprandial hyperglycemia. α-Glucosidase inhibitors (AGIs) and α-amylase inhibitors (AAIs) block the function of digestive enzymes, which delays the carbohydrate hydrolysis process and ultimately helps to control the postprandial hyperglycemia. Diversified 2-(3-(3-methoxybenzoyl)-4-hydroxy-1,1-dioxido-2H-benzo[e][1,2]thiazin-2-yl)-N-arylacetamides were synthesized and evaluated for their in vitro inhibitory potential against α-glucosidase and α-amylase enzymes. The compounds with chloro, bromo and methyl substituents demonstrated good inhibition of α-glucosidase enzymes having IC50 values in the range of 25.88-46.25 μM, which are less than the standard drug, acarbose (IC50 = 58.8 μM). Similarly, some derivatives having chloro, bromo and nitro substituents were observed potent inhibitors of α-amylase enzyme, with IC50 values of 7.52 to 15.06 μM, lower than acarbose (IC50 = 17.0 μM). In addition, the most potent compound, N-(4-bromophenyl)-2-(4-hydroxy-3-(3-methoxybenzoyl)-1,1-dioxido-2H-benzo[e][1,2]thiazin-2-yl)acetamide (12i), was found to be a non-competitive and competitive inhibitor of α-glucosidase and α-amylase enzymes, respectively, during kinetic studies. The molecular docking studies provided the binding modes of active compounds and the molecular dynamics simulation studies of compound 12i in complex with α-amylase also showed that the compound is binding in a fashion similar to that predicted by molecular docking studies.
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Affiliation(s)
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan;
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad 38000, Pakistan;
| | - Muhammad Muddassar
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad 45500, Pakistan;
| | - Sadia Sultan
- Faculty of Pharmacy, Puncak Alam Campus, Universiti Teknologi MARA, Bandar Puncak Alam 42300, Selangor Darul Ehsan, Malaysia;
- Atta-ur-Rahman Institute for Natural Products Discovery (AuRIns), Puncak Alam Campus, Universiti Teknologi MARA, Bandar Puncak Alam 42300, Selangor Darul Ehsan, Malaysia
| | - Magdi E. A. Zaki
- Department of Chemistry, Faculty of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
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9
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Li J, Li H, Fang D, Liu L, Han X, Sun J, Li C, Zhou Y, Ye D, Liu H. Sulfoximines Assisted Rh(III)-Catalyzed C-H Activation/Annulation Cascade to Synthesize Highly Fused Indeno-1,2-benzothiazines. J Org Chem 2021; 86:15217-15227. [PMID: 34613739 DOI: 10.1021/acs.joc.1c01820] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A facile access to highly fused tetracyclic indeno-1,2-benzothiazines has been established via a Rh(III)-catalyzed C-H bond activation and intramolecular annulation cascade between sulfoximides and all-carbon diazo indandiones. This strategy is characterized by the fact that the diazo coupling partners do not require preactivation, along with its high efficiency, broad substrate generality, and facile transformation. Particularly, the highly conjugated tetracyclic products demonstrate good optical properties and can easily enter cells to emit bright fluorescence for live cell imaging.
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Affiliation(s)
- Jian Li
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing 210023, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Hui Li
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing 210023, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Daqing Fang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Lingjun Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Xu Han
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Jina Sun
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Chunpu Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China
| | - Yu Zhou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
| | - Deju Ye
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hong Liu
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 138 Xianlin Avenue, Nanjing 210023, China.,State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China.,University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
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10
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Synthesis and α-Glucosidase Inhibition Activity of 2-[3-(Benzoyl/4-bromobenzoyl)-4-hydroxy-1,1-dioxido-2 H-benzo[ e][1,2]thiazin-2-yl]- N-arylacetamides: An In Silico and Biochemical Approach. Molecules 2021; 26:molecules26103043. [PMID: 34065194 PMCID: PMC8161055 DOI: 10.3390/molecules26103043] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 05/05/2021] [Accepted: 05/10/2021] [Indexed: 12/30/2022] Open
Abstract
Diabetes mellitus (DM) is a chronic disorder and has affected a large number of people worldwide. Insufficient insulin production causes an increase in blood glucose level that results in DM. To lower the blood glucose level, various drugs are employed that block the activity of the α-glucosidase enzyme, which is considered responsible for the breakdown of polysaccharides into monosaccharides leading to an increase in the intestinal blood glucose level. We have synthesized novel 2-(3-(benzoyl/4-bromobenzoyl)-4-hydroxy-1,1-dioxido-2H-benzo[e][1,2]thiazin-2-yl)-N-arylacetamides and have screened them for their in silico and in vitro α-glucosidase inhibition activity. The derivatives 11c, 12a, 12d, 12e, and 12g emerged as potent inhibitors of the α-glucosidase enzyme. These compounds exhibited good docking scores and excellent binding interactions with the selected residues (Asp203, Asp542, Asp327, His600, Arg526) during in silico screening. Similarly, these compounds also showed good in vitro α-glucosidase inhibitions with IC50 values of 30.65, 18.25, 20.76, 35.14, and 24.24 μM, respectively, which were better than the standard drug, acarbose (IC50 = 58.8 μM). Furthermore, a good agreement was observed between in silico and in vitro modes of study.
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11
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Szczęśniak-Sięga BM, Wiatrak B, Czyżnikowska Ż, Janczak J, Wiglusz RJ, Maniewska J. Synthesis and biological evaluation as well as in silico studies of arylpiperazine-1,2-benzothiazine derivatives as novel anti-inflammatory agents. Bioorg Chem 2020; 106:104476. [PMID: 33250206 DOI: 10.1016/j.bioorg.2020.104476] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/06/2020] [Accepted: 11/12/2020] [Indexed: 12/20/2022]
Abstract
Novel arylpiperazine-1,2-benzothiazine derivatives have been designed and synthesized as potential anti-inflammatory agents. Their structure and properties have been studied using spectroscopic techniques (1H NMR, 13C NMR, FT-IR), MS, elemental analyses, and single-crystal X-ray diffraction (SCXRD, for compound 7b). This study aimed to evaluate the inhibitory activity of new derivatives against both cyclooxygenase isoforms COX-1 and COX-2 due to the similarity of new compounds to oxicams drugs from the NSAIDs group. All new compounds were divided into two series - A and B - with a different linker between thiazine and piperazines nitrogens. Series A included the three-carbon aliphatic linker and series B - two-carbon with a carbonyl group. According to in vitro and molecular docking studies all new compounds exhibited cyclooxygenase inhibitory activity. The series of A compounds included COX-1 inhibitors only. In contrast, the B series showed inhibition of both COX-1 and COX-2, which suggested the importance of the acetoxy linker for COX-2 inhibition. Moreover, the most selective compound 7b, towards COX-2, was non-toxic for the normal human cell line (in concentration of 10 µM) comparable to reference drug meloxicam. Additionally, investigation of influence on model membranes confirmed the ability of the compound 7b to penetrate lipid bilayers which seemed to be important to the influence with membrane protein-cyclooxygenase.
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Affiliation(s)
- Berenika M Szczęśniak-Sięga
- Department of Medicinal Chemistry, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland.
| | - Benita Wiatrak
- Department of Pharmacology, Faculty of Medicine, Wroclaw Medical University, J. Mikulicza-Radeckiego 2, 50-345 Wrocław, Poland; Department of Basic Medical Sciences, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211, 50-556 Wroclaw, Poland
| | - Żaneta Czyżnikowska
- Department of Inorganic Chemistry, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211a, 50-556 Wrocław, Poland
| | - Jan Janczak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2 Str., 50-422 Wrocław, Poland
| | - Rafal J Wiglusz
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2 Str., 50-422 Wrocław, Poland
| | - Jadwiga Maniewska
- Department of Medicinal Chemistry, Faculty of Pharmacy, Wroclaw Medical University, Borowska 211, 50-556 Wrocław, Poland
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12
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Recent Advances in Catalytic Synthesis of Benzosultams. Molecules 2020; 25:molecules25194367. [PMID: 32977516 PMCID: PMC7582503 DOI: 10.3390/molecules25194367] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 11/17/2022] Open
Abstract
Benzosultams represent one category of multi-heteroatom heterocyclic scaffolds, which have been frequently found in pharmaceuticals, agricultural agents, and chiral catalysts. Given the diversely significant functions of these compounds in organic and medicinal chemistry, great efforts have been made to develop novel catalytic systems for the efficient construction of benzosultam motifs over the past decades. Herein, in this review, we mainly summarize the recent advances in the field of catalytic synthesis of benzosultams from 2017 to August of 2020, with an emphasis on the scopes and mechanisms of representative reactions.
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Evaluation of 1,2-Benzothiazine 1,1-dioxide Derivatives In Vitro Activity towards Clinical-Relevant Microorganisms and Fibroblasts. Molecules 2020; 25:molecules25153503. [PMID: 32752040 PMCID: PMC7435855 DOI: 10.3390/molecules25153503] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/16/2022] Open
Abstract
The global concern related with growing number of bacterial pathogens, resistant to numerous antibiotics, prone scientific environment to search for new antimicrobials. Antiseptics appear to be suitable candidates as adjunctive agents to antibiotics or alternative local treatment option aiming to prevent and treat infections. 1,2-benzothiazines are considered one the most promising of them. In this research twenty 1,2-benzothiazine 1,1-dioxide derivatives were scrutinized with regard to their biological activity. Three of them are new. For evaluation of compounds' activity against microbial pathogens, disk diffusion method and serial microdilution method was applied. To establish the cytotoxicity profile of tested 1,2-benzothiazines 1,1-dioxides derivatives, the cytotoxicity assay using fibroblasts L292 was performed. Antimicrobial activity of all tested compounds against Gram-positive Staphylococcus aureus and Enterococcus faecalis strains was higher than antimicrobial activity of DMSO solvent, which possesses antimicrobial activity itself. Gram-negative P. aeruginosa, E. coli and K. pneumoniae have shown susceptibility only to compounds 3e, 7i and 7l. None of tested compounds was effective against C. albicans. Compound 6g has demonstrated the strongest antimicrobial potency (MIC = 0.00975 mg/mL) among compounds of series 6. Compounds of series 7, namely 7d, 7f, 7g had the lowest minimum inhibitory concentration (MIC). Compound 7f displayed also the lowest cytotoxic effect against fibroblast cell line among series 7 compounds. All tested derivatives displayed lower MIC against Gram-positive bacteria than commercially applied antiseptic, povidone iodine, which MIC value range for tested Gram-positive bacteria was 1.56-6.25 mg/mL.
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Okwuchukwu PM, Bandyopadhyay D. Medicinally Privileged Sultams: Synthesis and Mechanism of Action. Mini Rev Med Chem 2020; 20:2193-2206. [PMID: 32682375 DOI: 10.2174/1389557520666200719015234] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 03/09/2020] [Accepted: 05/12/2020] [Indexed: 11/22/2022]
Abstract
To date, more than a thousand research articles have been published detailing various regio-, stereo-, chemo-, and enantioselective specific synthesis of the cyclic sulfonamides (sultams). Although enormous synthetic efforts were made, but bioactivities of sultams have not been widely investigated. Sultams are the sulfur analogs of lactams (cyclic amides) which demonstrate a broad range of medicinal activities and several lactam drugs are commercially available. In contrast, only a few sultam drugs are commercially available, while the presence of two oxygens on sulfur in sultam motifs can serve as a better H-bond acceptor than lactam scaffolds. One of the major objectives of this minireview is to draw appropriate attention from the medicinal/pharmaceutical chemists to conduct indepth research on sultam derivatives targeted to the development of new drugs. This article gives a brief account of the synthesis, potential bioactivity, and mechanisms of therapeutic action of four to seven-membered sultam derivatives. Based on the available literature, this is the first effort to consolidate only the medicinally privileged sultam molecules and drugs under the same umbrella. While every effort was taken to comprise all the relevant reports related to bioactive sultams, any oversight is truly unintentional.
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Affiliation(s)
- Precious M Okwuchukwu
- Department of Chemistry and the School of Earth, Environmental, and Marine Sciences (SEEMS), The University of Texas Rio Grande Valley, 1201 West University Drive, Edinburg, Texas 78539, United States
| | - Debasish Bandyopadhyay
- Department of Chemistry and the School of Earth, Environmental, and Marine Sciences (SEEMS), The University of Texas Rio Grande Valley, 1201 West University Drive, Edinburg, Texas 78539, United States
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15
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Neeraja P, Srinivas S, Banothu V, Sridhar B, Mukkanti K, Dubey PK, Pal S. Assembly of Benzothiazine and Triazole in a Single Molecular Entity: Synthesis of -Oxicam Derived Novel Molecules as Potential Antibacterial/ Anti-cancer Agents. Mini Rev Med Chem 2020; 20:929-940. [PMID: 31976832 DOI: 10.2174/1389557520666200124091315] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 05/10/2019] [Accepted: 08/21/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzothiazine derivatives, because of their various biological activities have attracted particular attention in Med Chem and drug discovery efforts. The synthetic modifications of 1,2-benzothiazine 1,1-dioxides have been undertaken in order to explore and identify novel compounds or new analogues possessing promising biological activities. In our effort we have designed -oxicam derived bezothiazine-1,2,3-triazole derivatives as potential antibacterial agents. METHODS These compounds were synthesized via a multi-step sequence involving the Cu catalyzed azide- alkyne cycloaddition (CuAAC) as a key step. The CuAAC proceeded at room temperature in DMF to afford 26 novel molecules in good (70-90%) yields. RESULTS All these compounds were tested for their antibacterial properties against four strains of bacterial microorganisms and subsequently cytotoxic properties against lung and colon cancer cell lines. The compound 4e showed activities against majority of the bacterial species used (nearly comparable to amoxicillin, ciprofloxacin and ofloxacin against P. vulgaris) whereas 4d and 4f showed cytotoxicities selective towards cancer cells. CONCLUSION The present bezothiazine-1,2,3-triazole framework represents a new template for the identification of novel and potent antibacterial/anticancer agents.
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Affiliation(s)
- Papigani Neeraja
- Department of Chemistry, DVR College of Engineering & Technology, Kashipur (Village), Sangareddy District, Telangana- 502285, India
| | - Suryapeta Srinivas
- Alembic Pharmaceuticals Ltd, 450 MN Park, Genome Valley, Turkapally Village, Shameerpet Medchal - Malkajgiri - 500101, India
| | - Venkanna Banothu
- Centre for Biotechnology (CBT), IST, JNTUH, Hyderabad-500085, India
| | | | | | | | - Sarbani Pal
- Department of Chemistry, MNR Degree & PG College, Kukatpally, Hyderabad -500085, India
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16
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Synthesis, cytotoxic and antioxidant activities of azolyl benzothiazine carboxamides. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03778-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Ashraf A, Aman F, Movassaghi S, Zafar A, Kubanik M, Siddiqui WA, Reynisson J, Söhnel T, Jamieson SMF, Hanif M, Hartinger CG. Structural Modifications of the Antiinflammatory Oxicam Scaffold and Preparation of Anticancer Organometallic Compounds. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00751] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Adnan Ashraf
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
- Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Farhana Aman
- Department of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Sanam Movassaghi
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Ayesha Zafar
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Mario Kubanik
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | | | - Jóhannes Reynisson
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Stephen M. F. Jamieson
- Auckland Cancer Society Research Centre, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Muhammad Hanif
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Christian G. Hartinger
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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18
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Ashraf A, Ejaz SA, Rahman SU, Siddiqui WA, Arshad MN, Lecka J, Sévigny J, Zayed MEM, Asiri AM, Iqbal J, Hartinger CG, Hanif M. Hybrid compounds from chalcone and 1,2-benzothiazine pharmacophores as selective inhibitors of alkaline phosphatase isozymes. Eur J Med Chem 2018; 159:282-291. [DOI: 10.1016/j.ejmech.2018.09.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 09/17/2018] [Accepted: 09/25/2018] [Indexed: 01/08/2023]
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19
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Swaroop DK, Kumar NR, Ratnakarreddy K, Raja G, Srigiridhar K, Poornachandra Y, Kumar CG, Babu NJ, Kumar GS, Narsaiah B. Novel 1,2,3‐Triazole‐Functionalized 1,2‐Benzothiazine 1,1‐Dioxide Derivatives: Regioselective Synthesis, Biological Evaluation and Docking Studies. ChemistrySelect 2018; 3:2398-2403. [DOI: https:/doi.org/10.1002/slct.201800072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 02/13/2018] [Indexed: 11/07/2023]
Abstract
AbstractA series of novel 1,2‐benzothiazine‐1,1‐dioxide derivatives (Z)‐3‐hydroxy‐1‐(4‐hydroxy‐2‐methyl‐1,1‐dioxido‐2H‐benzo[e][1, 2]thiazin‐3‐yl)‐3‐phenyl substituted prop‐2‐en‐1‐one (6 a‐d) were synthesized starting from sodium salt of saccharin 1 in series of steps via 3‐acetyl‐2‐methyl‐1,1‐dioxido‐2H‐benzo[e][1, 2]thiazin‐4‐yl substituted benzoates (5 a‐d). Compound 6 e was obtained alternately from 1‐(4‐Hydroxy‐2‐methyl‐1,1‐dioxo‐1,2‐dihydro‐1λ6‐benzo[e][1, 2]thiazin‐3‐yl)‐ethanone (4). Compounds 6 a‐e were further reacted with aromatic azides to form (4‐hydroxy‐2‐methyl‐1,1‐dioxido‐2H‐benzo[e][1, 2]thiazin‐3‐yl)(1‐substitutedphenyl)‐5‐ substituted pheny or methyl‐1H‐1,2,3‐triazol‐4‐yl)methanone derivatives (7 a‐o) by regioselective cyclization. All the compounds were evaluated for anti‐inflammatory and anti‐cancer activities. Compounds 5 a‐b, 6 a‐b, 7 a, 7 c‐d, 7 i and 7 k‐l which showed significant anti‐inflammatory activity at micro molar concentration have been identified. Also screened for cytotoxic activity against four human cancer cells and one normal cell such as prostate cancer (PC‐3), breast adenocarcinoma (MDA‐MB‐231), liver hepatocellular carcinoma (Hep G2), cervical cancer (HeLa) and normal umbilical vein endothelial cell (HUVEC). Compounds 6 a, 7 g, 7 h and 7 k have been identified as promising candidates. Further, anti‐inflammatory activity is also validated by docking studies and compounds 5 a, 5 b and 7 d found to show good interactions when docked with IL‐1β signaling complex.
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Affiliation(s)
| | - Nagiri Ravi Kumar
- Fluoroorganic division CSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad-500607 India
| | - Kuchukulla Ratnakarreddy
- Fluoroorganic division CSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad-500607 India
| | - Gopoju Raja
- Centre for Chemical Biology CSIR-Indian Institute of Chemical Technology
| | | | - Yedla Poornachandra
- Medicinal Chemistry and Pharmacology Division SIR-Indian Institute of Chemical Technology
| | - Chityal Ganesh Kumar
- Medicinal Chemistry and Pharmacology Division SIR-Indian Institute of Chemical Technology
| | | | | | - Banda Narsaiah
- Fluoroorganic division CSIR-Indian Institute of Chemical Technology, Tarnaka Hyderabad-500607 India
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Swaroop DK, Kumar NR, Ratnakarreddy K, Raja G, Srigiridhar K, Poornachandra Y, Kumar CG, Babu NJ, Kumar GS, Narsaiah B. Novel 1,2,3-Triazole-Functionalized 1,2-Benzothiazine 1,1-Dioxide Derivatives: Regioselective Synthesis, Biological Evaluation and Docking Studies. ChemistrySelect 2018. [DOI: 10.1002/slct.201800072] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Desireddy Krishna Swaroop
- Fluoroorganic division; CSIR-Indian Institute of Chemical Technology, Tarnaka; Hyderabad-500607 India
| | - Nagiri Ravi Kumar
- Fluoroorganic division; CSIR-Indian Institute of Chemical Technology, Tarnaka; Hyderabad-500607 India
| | - Kuchukulla Ratnakarreddy
- Fluoroorganic division; CSIR-Indian Institute of Chemical Technology, Tarnaka; Hyderabad-500607 India
| | - Gopoju Raja
- Centre for Chemical Biology; CSIR-Indian Institute of Chemical Technology
| | | | - Yedla Poornachandra
- Medicinal Chemistry and Pharmacology Division; SIR-Indian Institute of Chemical Technology
| | - Chityal Ganesh Kumar
- Medicinal Chemistry and Pharmacology Division; SIR-Indian Institute of Chemical Technology
| | | | - Gunda Shravan Kumar
- Bioinformatics Division; PGRRCDE; Osmania University, Hyderabad; 500007 India
| | - Banda Narsaiah
- Fluoroorganic division; CSIR-Indian Institute of Chemical Technology, Tarnaka; Hyderabad-500607 India
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Affiliation(s)
- Sudarshan Debnath
- Department of Chemistry; Syamsundar College; 713424 Shyamsundar India
| | - Shovan Mondal
- Department of Chemistry; Syamsundar College; 713424 Shyamsundar India
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22
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Saddique FA, Zaib S, Jalil S, Aslam S, Ahmad M, Sultan S, Naz H, Iqbal M, Iqbal J. Synthesis, monoamine oxidase inhibition activity and molecular docking studies of novel 4-hydroxy-N'-[benzylidene or 1-phenylethylidene]-2-H/methyl/benzyl-1,2-benzothiazine-3-carbohydrazide 1,1-dioxides. Eur J Med Chem 2017; 143:1373-1386. [PMID: 29126721 DOI: 10.1016/j.ejmech.2017.10.036] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Revised: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 11/28/2022]
Abstract
Three series of 4-hydroxy-N'-[benzylidene/1-phenylethylidene]-2-H/methyl/benzyl-1,2-benzothiazine-3-carbohydrazide 1,1-dioxides (9-11)a-l were synthesized and unraveled to be highly potent dual inhibitors of monoamine oxidases (MAO-A and MAO-B). All the examined compounds demonstrated IC50 values in lower micro-molar range for both MAO-A as well as MAO-B. The most active MAO-A inhibitor was 4-hydroxy-N'-(1-phenylethylidene)-2H-benzo[e][1,2]thiazine-3-carbohydrazide 1,1-dioxide (9i) with an IC50 value of 0.11 ± 0.005 μM, whereas, methyl 4-hydroxy-2H-benzo[e][1,2]thiazine-3-carboxylate 1,1-dioxide (3) was the most active MAO-B inhibitor with an IC50 value of 0.21 ± 0.01 μM. Enzyme kinetics studies revealed that the most potent compounds inhibited both MAO enzymes (A & B) in a competitive fashion. Molecular docking studies were also performed to obtain an intuitive picture of inhibition potential for potent inhibitors. The high potency of these compounds is optimally combined with highly favorable ADME profile with predicted good oral bioavailability.
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Affiliation(s)
| | - Sumera Zaib
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Saquib Jalil
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Sana Aslam
- Department of Chemistry, Government College Women University, Faisalabad, 38000, Pakistan
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad, 38000, Pakistan.
| | - Sadia Sultan
- Faculty of Pharmacy, Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia; Atta-ur-Rahman Institute for Natural Products Discovery (AuRIns), Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia
| | - Humera Naz
- Faculty of Pharmacy, Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia; Atta-ur-Rahman Institute for Natural Products Discovery (AuRIns), Universiti Teknologi MARA, Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor Darul Ehsan, Malaysia
| | - Mazhar Iqbal
- Drug Discovery and Structural Biology Group, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Faisalabad 38000, Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan.
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23
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Gouda MA, Hussein BHM, El-Said Sherif Y. Synthesis and medicinal importance of oxicams and their analogues. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1350983] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Moustafa A. Gouda
- Department of Chemistry, Faculty of Science and Arts, Taibah University, Ulla, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Belal H. M. Hussein
- Department of Chemistry, Faculty of Science and Arts, Taibah University, Ulla, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | - Yousery El-Said Sherif
- Department of Chemistry, Faculty of Science and Arts, Taibah University, Ulla, Kingdom of Saudi Arabia
- Department of Clinical Pharmacology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
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24
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Gouda MA. Overview of the synthetic routes of 2-alkyl-4-hydroxy-2 H-1,2-benzothiazine-3-carboxamides-1,1-dioxides (oxicams) and their analogues. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1323102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Moustafa A. Gouda
- Department of Chemistry, Faculty of Science and Arts, Taibah University, Ulla, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
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Fawad Zahoor A, Akhtar R, Ahmad S, Ali Raza Naqvi S, Gul Khan S, Suleman M. Update on the Reactivity of Saccharin: An Excellent Precursor for the Synthesis of Biologically Important Molecules. HETEROCYCLES 2017. [DOI: 10.3987/rev-17-862] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Bioactive Thiazine and Benzothiazine Derivatives: Green Synthesis Methods and Their Medicinal Importance. Molecules 2016; 21:molecules21081054. [PMID: 27537865 PMCID: PMC6273871 DOI: 10.3390/molecules21081054] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 08/05/2016] [Accepted: 08/06/2016] [Indexed: 01/13/2023] Open
Abstract
Thiazines are a group of heterocyclic organic compounds that are still largely unexplored for their pharmacological activities. There are different available methods for the synthesis of thiazine derivatives in the literature. In this review, we discuss available methods of thiazine preparation through green synthesis methods. Beside their synthesis, many thiazine derivatives are biologically active and play an important role in the treatment of various diseases and show promising results of varying degrees, where they act as antibacterial, antifungal, antitumor, antimalarial, antineoplastic, antiviral, anti-inflammatory, analgesic and anticancer agents and thus they represent an interesting class of heterocyclic medicinal compounds worthy of further exploration.
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Synthesis and Antimicrobial Activity of 1,2-Benzothiazine Derivatives. Molecules 2016; 21:molecules21070861. [PMID: 27376253 PMCID: PMC6274075 DOI: 10.3390/molecules21070861] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/22/2016] [Accepted: 06/23/2016] [Indexed: 01/07/2023] Open
Abstract
A number of 1,2-benzothiazines have been synthesized in a three-step process. Nine chalcones 1–9 bearing methyl, fluoro, chloro and bromo substituents were chlorosulfonated with chlorosulfonic acid to generate the chalcone sulfonyl chlorides 10–18. These were converted to the dibromo compounds 19–27 through reaction with bromine in glacial acetic acid. Compounds 19–27 were reacted with ammonia, methylamine, ethylamine, aniline and benzylamine to generate a library of 45 1,2-benzothiazines 28–72. Compounds 28–72 were evaluated for their antimicrobial activity using broth microdilution techniques against two Gram-positive bacteria (Bacillus subtilis and Staphylococcus aureus) and two Gram-negative bacteria (Proteus vulgaris and Salmonella typhimurium). The results demonstrated that none of the compounds showed any activity against Gram-negative bacteria P. vulgaris and S. typhimurium; however, compounds 31, 33, 38, 43, 45, 50, 53, 55, 58, 60, 63 and 68 showed activity against Gram-positive bacteria Bacillus subtilis and Staphylococcous aureus. The range of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) was 25–600 µg/mL, though some of the MIC and MBC concentrations were high, indicating weak activity. Structure activity relationship studies revealed that the compounds with a hydrogen atom or an ethyl group on the nitrogen of the thiazine ring exerted antibacterial activity against Gram-positive bacteria. The results also showed that the compounds where the benzene ring of the benzoyl moiety contained a methyl group or a chlorine or bromine atom in the para position showed higher antimicrobial activity. Similar influences were identified where either a bromine or chlorine atom was in the meta position.
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28
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Zaheer M, Zia-ur-Rehman M, Jamil N, Arshad MN, Siddiqui SZ, Asiri AM. Efficient Green Synthesis of N′-Benzylidene-2-(2-Fluorobiphenyl) Propanehydrazides: Crystal Structure and Anti-Oxidant Potential. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14452514747565] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
For the synthesis of N′-benzylidene-2-(2-fluorobiphenyl)propanehydrazides, 2-(2-fluorobiphenyl-4-yl)propanoic acid was esterified to methyl 2-(2-fluorobiphenyl-4-yl)propanoate under microwave irradiation followed by hydrazinolysis. This hydrazide was then reacted in an ultrasonic bath with different benzaldehydes to afford a series of N′-benzylidene-2-(2-fluorobiphenyl)propanehydrazides. Comparison of both the conventional and ultrasound assisted reactions indicates a significant reduction in reaction times and improvement in yields. Besides chemical characterisation and X-ray crystallography, all the synthesised compounds were evaluated for their anti-oxidant potential (total anti-oxidant activity, ferric reducing antioxidant power and total phenolic content) and most of them were found to have useful potential for pharmaceutical applications especially derivative bearing 2-hydroxy substituents.
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Affiliation(s)
- Muhammad Zaheer
- Applied Chemistry Research Centre, PCSIR Laboratories Complex, Lahore-54600 Pakistan
- College of Earth & Environmental Sciences, University of the Punjab, Lahore-54590 Pakistan
| | | | - Nadia Jamil
- College of Earth & Environmental Sciences, University of the Punjab, Lahore-54590 Pakistan
| | - Muhammad Nadeem Arshad
- Chemistry Department & Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | | | - Abdullah Mohammad Asiri
- Chemistry Department & Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah 21589, Saudi Arabia
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Arshad MN, Asiri AM, Alamry KA, Mahmood T, Gilani MA, Ayub K, Birinji AS. Synthesis, crystal structure, spectroscopic and density functional theory (DFT) study of N-[3-anthracen-9-yl-1-(4-bromo-phenyl)-allylidene]-N-benzenesulfonohydrazine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 142:364-74. [PMID: 25721652 DOI: 10.1016/j.saa.2015.01.101] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 12/23/2014] [Accepted: 01/30/2015] [Indexed: 05/28/2023]
Abstract
N-[3-anthracen-9-yl-1-(4-bromo-phenyl)-allylidene]-N-benzenesulfonohydrazine has been synthesized and characterized by various spectroscopic techniques including FT-IR, UV-vis, (1)H-NMR, (13)C-NMR spectroscopy, and the structure was unequivocally confirmed by single crystal X-ray diffraction studies. The compound crystallized in monoclinic system with P21/n space group, and adopted cis-geometry around the azomethine CN double bond. The X-ray crystal structure revealed that the intermolecular packing was stabilized by C-H⋯O type hydrogen bonding interaction, whereas NH was not involved in hydrogen bonding due to steric hindrance. Absorption wavelength was studied by scanning UV-vis. absorption spectrum in different solvents to explore excited state stability of the molecule in polar solvent. Density functional theory calculations were performed at B3LYP/6-31G (d, p) level in order to compare the experimental results with the theoretical results. The simulated molecular electrostatic potential (MEP), Mulliken charges and NPA (natural population analysis) also confirmed the presence of specific intermolecular hydrogen bonding (C-H⋯O). In addition natural bond orbital (NBO) analysis (intra and inter molecular bonding and interaction among bonds), frontier molecular orbital analysis (electronic properties) and first hyperpolarizability analysis (nonlinear optical response) were simulated at B3LYP/6-31G (d, p) level of theory.
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Affiliation(s)
- Muhammad Nadeem Arshad
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Abdullah M Asiri
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Khalid A Alamry
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Tariq Mahmood
- Department of Chemistry, COMSATS Institute of Information Technology, University Road, Tobe Camp, 22060 Abbottabad, Pakistan.
| | - Mazhar Amjad Gilani
- Department of Chemical Engineering, COMSATS Institute of Information Technology, Defence Road, Off Raiwind Road, Lahore, Pakistan.
| | - Khurshid Ayub
- Department of Chemistry, COMSATS Institute of Information Technology, University Road, Tobe Camp, 22060 Abbottabad, Pakistan; Department of Chemistry, College of Science, King Faisal University, Al-Hafouf 31982, Saudi Arabia
| | - Abdulhadi Salih Birinji
- Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia; Centre of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
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30
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Popiołek Ł, Biernasiuk A, Malm A. Design, Synthesis, andin vitroAntimicrobial Activity of New Furan/Thiophene-1,3-Benzothiazin-4-one Hybrids. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2429] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Łukasz Popiołek
- Department of Organic Chemistry, Faculty of Pharmacy with Medical Analytics Division; Medical University of Lublin; 4A Chodźki Street 20-093 Lublin Poland
| | - Anna Biernasiuk
- Department of Pharmaceutical Microbiology with Laboratory for Microbiological Diagnostics, Faculty of Pharmacy with Medical Analytics Division; Medical University of Lublin; 1 Chodźki Str 20-093 Lublin Poland
| | - Anna Malm
- Department of Pharmaceutical Microbiology with Laboratory for Microbiological Diagnostics, Faculty of Pharmacy with Medical Analytics Division; Medical University of Lublin; 1 Chodźki Str 20-093 Lublin Poland
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31
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Gannarapu MR, Vasamsetti SB, Punna N, Kotamraju S, Banda N. Synthesis of novel 1-substituted triazole linked 1,2-benzothiazine 1,1-dioxido propenone derivatives as potent anti-inflammatory agents and inhibitors of monocyte-to-macrophage differentiation. MEDCHEMCOMM 2015. [DOI: 10.1039/c5md00171d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Compounds12g,12iand12lmodulate pro-inflammatory cytokine production by inhibiting monocyte differentiation.
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Affiliation(s)
- Malla Reddy Gannarapu
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500607
- India
- Fluoroorganic Division
| | - Sathish Babu Vasamsetti
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500607
- India
- Centre for Chemical Biology
| | - Nagender Punna
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500607
- India
- Fluoroorganic Division
| | - Srigiridhar Kotamraju
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500607
- India
- Centre for Chemical Biology
| | - Narsaiah Banda
- Academy of Scientific and Innovative Research
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500607
- India
- Fluoroorganic Division
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32
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Aman F, Hanif M, Siddiqui WA, Ashraf A, Filak LK, Reynisson J, Söhnel T, Jamieson SMF, Hartinger CG. Anticancer Ruthenium(η6-p-cymene) Complexes of Nonsteroidal Anti-inflammatory Drug Derivatives. Organometallics 2014. [DOI: 10.1021/om500825h] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Farhana Aman
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
- Department
of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Muhammad Hanif
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
- Department
of Chemistry, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | | | - Adnan Ashraf
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
- Department
of Chemistry, University of Sargodha, Sargodha 40100, Pakistan
| | - Lukas K. Filak
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Jóhannes Reynisson
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Tilo Söhnel
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Stephen M. F. Jamieson
- Auckland
Cancer Society Research Centre, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Christian G. Hartinger
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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33
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Malla Reddy G, Nagender P, Naresh Kumar R, Ahn JH, Pranay Kumar K, Kanugula AKR, Rama Krishna KVS, Kotamraju S, Narsaiah B. Studies on Synthesis of Novel Triazole Tagged Pyrazole Fused Naphthalene 5-Thiazine-5,5-dioxide Derivatives, Their Antimicrobial, and Antioxidant Activity. J Heterocycl Chem 2014. [DOI: 10.1002/jhet.2013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- G. Malla Reddy
- Fluoroorganic Division, Indian Institute of Chemical Technology; Hyderabad 500607 India
| | - P. Nagender
- Fluoroorganic Division, Indian Institute of Chemical Technology; Hyderabad 500607 India
| | - R. Naresh Kumar
- Fluoroorganic Division, Indian Institute of Chemical Technology; Hyderabad 500607 India
| | - J. H. Ahn
- Drug Discovery Division, Korea Research Institute of Chemical Technology; Daejeon South Korea
| | - K. Pranay Kumar
- Biology Division, Indian Institute of Chemical Technology; Hyderabad 500607 India
| | - A. K. R. Kanugula
- Department of Chemical Biology; Indian Institute of Chemical Technology; Hyderabad 500607 India
| | | | - S. Kotamraju
- Department of Chemical Biology; Indian Institute of Chemical Technology; Hyderabad 500607 India
| | - B. Narsaiah
- Fluoroorganic Division, Indian Institute of Chemical Technology; Hyderabad 500607 India
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34
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Synthesis of novel 1,2-benzothiazine 1,1-dioxide-3-ethanone oxime N-aryl acetamide ether derivatives as potent anti-inflammatory agents and inhibitors of monocyte-to-macrophage transformation. Eur J Med Chem 2014; 75:143-50. [DOI: 10.1016/j.ejmech.2013.12.053] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 11/18/2013] [Accepted: 12/25/2013] [Indexed: 11/18/2022]
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35
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Wang Z, Kuninobu Y, Kanai M. Copper-Catalyzed Intramolecular N–S Bond Formation by Oxidative Dehydrogenative Cyclization. J Org Chem 2013; 78:7337-42. [DOI: 10.1021/jo401056g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Zhen Wang
- Graduate School
of Pharmaceutical
Sciences, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- ERATO, Japan Science and Technology Agency (JST), Kanai Life Science Catalysis
Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoichiro Kuninobu
- Graduate School
of Pharmaceutical
Sciences, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- ERATO, Japan Science and Technology Agency (JST), Kanai Life Science Catalysis
Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Motomu Kanai
- Graduate School
of Pharmaceutical
Sciences, The University of Tokyo, Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- ERATO, Japan Science and Technology Agency (JST), Kanai Life Science Catalysis
Project, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Abstract
In this paper we report the design, synthesis, antinociceptive and anti-inflammatory activities of a series of benzothiazine N-acylhydrazones 14a–h, planned by structural modification of piroxicam (1), a non steroidal anti-inflammatory drug. Among the synthesized analogues, compounds 14f (LASSBio-1637) and 14g (LASSBio-1639) were identified as novel antinociceptive and anti-inflammatory prototypes, active by oral administration, acting by a mechanism of action that seems to be different from that of piroxicam, since they were inactive as an inhibitor of cyclooxygenase (COX-1 and COX-2) at concentrations of 10 μM.
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Zia-ur-Rehman M, Shahid B, Siddiqui HL, Ahmad T, Parvez M. Propan-2-yl 2-(1,1,3-trioxo-2,3-dihydro-1λ 6,2-benzothiazol-2-yl)acetate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o2761. [PMID: 22969642 PMCID: PMC3435796 DOI: 10.1107/s1600536812036148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Accepted: 08/16/2012] [Indexed: 11/20/2022]
Abstract
In the title molecule, C12H13NO5S, the benzisothiazole ring system is essentially planar (r.m.s. deviation = 0.0169 Å) as is the –C—C(=O)—O—C– sequence of atoms in the vicinity of the acetate group (r.m.s. deviation = 0.0044 Å). The mean plane of these atoms forms a dihedral angle of 88.41 (7)° with the benzisothiazole ring system. In the crystal, weak C—H⋯O hydrogen bonds involving methylene and methyne H atoms form R43(20) graph-set motifs.
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Ahmad M, Siddiqui HL, Gardiner JM, Parvez M, Aslam S. Synthesis and antioxidant studies of novel N-substituted benzyl/phenyl-2-(3,4-dimethyl-5,5-dioxidopyrazolo[4,3-c][1,2]benzothiazin-2(4H)-yl)acetamides. Med Chem Res 2012. [DOI: 10.1007/s00044-012-0062-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Synthesis and anti-bacterial activities of some novel pyrazolobenzothiazine-based chalcones and their pyrimidine derivatives. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9820-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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40
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Ahmad N, Zia-ur-Rehman M, Siddiqui HL, Arshad MN, Asiri AM. N′-[( E)-1-(4-Bromophenyl)ethylidene]-4-hydroxy-2-methyl-1,1-dioxo-2 H-1,2-benzothiazine-3-carbohydrazide. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o2613. [PMID: 22064647 PMCID: PMC3201552 DOI: 10.1107/s1600536811035641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Accepted: 09/01/2011] [Indexed: 11/11/2022]
Abstract
The six-membered heterocycle in the title compound, C18H16BrN3O4S, adopts a sofa conformation. Intramolecular N—H⋯N and O—H⋯O hydrogen bonds stabilize the molecular conformation by forming a five- and a six-membered ring, respectively. The crystal packing is stabilized by intermolecular C—H⋯O hydrogen bonds.
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