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Sarkar A, Mandal RD, Chakraborty N, Das AR. Cascade [4 + 1] Annulation through Activation of the C(sp 2)-H Bond Enabling Benzothiadiazinoisoindolcarboxylate, Benzothiadiazinoisoindole, and Benzothiadiazinoisoindolepyrrolidinedione as Hybrid Spiro-Heterocyclic Frameworks†. J Org Chem 2024. [PMID: 38758359 DOI: 10.1021/acs.joc.4c00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Two structurally distinct and biologically privileged succinimide and isoindole heteroarenes bearing benzothiadiazinedioxide motif-centered hybrid conjugates are proficiently achieved through Rh(III)-catalyzed sequential C(sp2)-H bond activation, ortho-alkenylation and finally cascade intramolecular cyclization. The significant feature of this developed protocol is that the resulting diversely decorated heterocycles contain a quaternary carbon center and this has been coursed through atypical [4 + 1] annulation ignoring the prevalent [4 + 2]-cyclization pathway and interestingly the applied coupling partners (e.g., maleimide, maleate, and styrene) to materialize the protocol functioned only as C1 synthon. Furthermore, the selective reduction strategy enables to modify the hybrid conjugate of succinimide and benzothiazine dioxide to benzothiazine dioxide-based spirocyclic isoindolopyrrolidinedione skeleton following preferential reduction of one carbonyl group of imide functionality. Overall this methodology emerges to be easily handled, versatile, time-efficient, and manifests relatively unfamiliar spiro-cyclization and good functional group tolerance so easy to grab a library of the entirely new variant of decorated hybrid spiro-heterocyclic scaffolds.
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Affiliation(s)
- Anindita Sarkar
- Department of Chemistry, University of Calcutta, Kolkata 700009, India
| | - Rahul Dev Mandal
- Department of Chemistry, University of Calcutta, Kolkata 700009, India
| | | | - Asish R Das
- Department of Chemistry, University of Calcutta, Kolkata 700009, India
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2
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Sharma A, Singh J, Sharma A. Synthesis of Quinazolinones and Benzothiazoles Using α-Keto Acids under Ball Milling. J Org Chem 2024; 89:5229-5238. [PMID: 38551089 DOI: 10.1021/acs.joc.3c02435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Mechanochemistry refers to the initiation of chemical reactions via mechanical forces such as milling, grinding, or shearing to achieve the chemical transformations. As a manifestation of mechanocatalysis, herein, an oxidant-free and solvent-free approach for the synthesis of quinazolinones (23 derivatives) and benzothiazoles (23 derivatives) has been developed through stainless-steel-driven decarboxylative acyl radical generation from α-keto acids. A library of 2-arylquinazolinones and 2-arylbenzothiazoles has been prepared in moderate to good yields at room temperature. Moreover, control experiments and XPS studies supported the reduction (by zerovalent iron) of molecular oxygen through the moderate abrasion of balls, which promoted the generation of a superoxide radical anion via a SET process.
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Affiliation(s)
- Anoop Sharma
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Jitender Singh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Anuj Sharma
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
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3
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Pennamuthiriyan A, Rengan R. Nickel Pincer Complexes Catalyzed Sustainable Synthesis of 3,4-Dihydro-2 H-1,2,4-benzothiadiazine-1,1-dioxides via Acceptorless Dehydrogenative Coupling of Primary Alcohols. J Org Chem 2024; 89:2494-2504. [PMID: 38326039 DOI: 10.1021/acs.joc.3c02508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
We report the atom-economic and sustainable synthesis of biologically important 3,4-dihydro-2H-1,2,4-benzothiadiazine-1,1-dioxide (DHBD) derivatives from readily available aromatic primary alcohols and 2-aminobenzenesulfonamide catalyzed by nickel(II)-N∧N∧S pincer-type complexes. The synthesized nickel complexes have been well-studied by elemental and spectroscopic (FT-IR, NMR, and HRMS) analyses. The solid-state molecular structure of complex 2 has been authenticated by a single-crystal X-ray diffraction study. Furthermore, a series of 3,4-dihydro-2H-1,2,4-benzothiadiazine-1,1-dioxide derivatives have been synthesized (24 examples) utilizing a 3 mol % Ni(II) catalyst through acceptorless dehydrogenative coupling of benzyl alcohols with benzenesulfonamide. Gratifyingly, the catalytic protocol is highly selective with the yield up to 93% and produces eco-friendly water/hydrogen gas as byproducts. The control experiments and plausible mechanistic investigations indicate that the coupling of the in situ generated aldehyde with benzenesulfonamide leads to the desired product. In addition, a large-scale synthesis of one of the thiadiazine derivatives unveils the synthetic usefulness of the current methodology.
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Affiliation(s)
- Anandaraj Pennamuthiriyan
- Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli 620024, Tamilnadu, India
| | - Ramesh Rengan
- Centre for Organometallic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirappalli 620024, Tamilnadu, India
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Kumaran S, Parthasarathy K. Rhodium-Catalyzed Annulations and Heck Coupling/Aza-Michael Addition for the Synthesis of Benzothiadiazinoisoquinoline 6,6-Dioxides and Benzothiadiazinoisoindole 5,5-Dioxides, Respectively. J Org Chem 2022; 87:11989-12000. [PMID: 36049131 DOI: 10.1021/acs.joc.2c00964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new and efficient protocol has been demonstrated for the synthesis of benzothiadiazinoisoquinoline 6,6-dioxides and benzothiadiazinoisoindole 5,5-dioxides in good to excellent yields. These compounds are formed through a sequential Rh(III)-catalyzed C-H cyclization of dihydrophenylbenzothiadiazine 1,1-dioxides with alkynes and oxidative Heck coupling/aza-Michael addition of dihydrophenylbenzothiadiazine 1,1-dioxides with acrylates, respectively.
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Affiliation(s)
- Subramani Kumaran
- Department of Organic Chemistry, University of Madras, Guindy Campus, Tamilnadu, Chennai 600025, India
| | - Kanniyappan Parthasarathy
- Department of Organic Chemistry, University of Madras, Guindy Campus, Tamilnadu, Chennai 600025, India
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5
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Rao MS, Hussain S. One-Pot, Borax-mediated synthesis of structurally diverse N, S-heterocycles in water. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Kumar GR, Banik S, Ramesh B, Sridhar B, Venkata Subba Reddy B. Oxidative Annulation of 3-Aryl-2 H
-benzo[e][1,2,4]thiadiazine-1,1-dioxides with Aryl Aldehydes: An Easy Access to Hydroxyisoindolo[1,2- b
] benzothiadiazinedioxide Scaffolds. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901509] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- G. Ravi Kumar
- Fluoro & Agrochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Swarnayu Banik
- Fluoro & Agrochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Boora Ramesh
- Fluoro & Agrochemicals; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Balasubramanian Sridhar
- Laboratory of X-ray Crystallography; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
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7
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Synthesis and vasodilator activity of new 1,4-dihyropyridines bearing sulfonylurea, urea and thiourea moieties. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00925-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Vyas VK, Parikh P, Ramani J, Ghate M. Medicinal Chemistry of Potassium Channel Modulators: An Update of Recent Progress (2011-2017). Curr Med Chem 2019; 26:2062-2084. [PMID: 29714134 DOI: 10.2174/0929867325666180430152023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 12/22/2017] [Accepted: 04/25/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Potassium (K+) channels participate in many physiological processes, cardiac function, cell proliferation, neuronal signaling, muscle contractility, immune function, hormone secretion, osmotic pressure, changes in gene expression, and are involved in critical biological functions, and in a variety of diseases. Potassium channels represent a large family of tetrameric membrane proteins. Potassium channels activation reduces excitability, whereas channel inhibition increases excitability. OBJECTIVE Small molecule K+ channel activators and inhibitors interact with voltage-gated, inward rectifying, and two-pore tandem potassium channels. Due to their involvement in biological functions, and in a variety of diseases, small molecules as potassium channel modulators have received great scientific attention. METHODS In this review, we have compiled the literature, patents and patent applications (2011 to 2017) related to different chemical classes of potassium channel openers and blockers as therapeutic agents for the treatment of various diseases. Many different chemical classes of selective small molecule have emerged as potassium channel modulators over the past years. CONCLUSION This review discussed the current understanding of medicinal chemistry research in the field of potassium channel modulators to update the key advances in this field.
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Affiliation(s)
- Vivek K Vyas
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad 382 481 Gujarat, India
| | - Palak Parikh
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad 382 481 Gujarat, India
| | - Jonali Ramani
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad 382 481 Gujarat, India
| | - Manjunath Ghate
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Nirma University, Ahmedabad 382 481 Gujarat, India
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9
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Abe T, Itoh T, Terasaki M. Total Synthesis of Fontanesine B and Its Isomer: Their Antiproliferative Activity against Human Colorectal Cancer Cells. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical SciencesHealth Sciences University of Hokkaido, Ishikari-Tobetsu Hokkaido 061-0293 Japan
| | - Tomoki Itoh
- Faculty of Pharmaceutical SciencesHealth Sciences University of Hokkaido, Ishikari-Tobetsu Hokkaido 061-0293 Japan
| | - Masaru Terasaki
- Faculty of Pharmaceutical SciencesHealth Sciences University of Hokkaido, Ishikari-Tobetsu Hokkaido 061-0293 Japan
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10
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Teng Q, Sun Y, Yao Y, Tang H, Li J, Pan Y. Metal‐ and Catalyst‐Free Electrochemical Synthesis of Quinazolinones from Alkenes and 2‐Aminobenzamides. ChemElectroChem 2019. [DOI: 10.1002/celc.201900682] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Qing‐Hu Teng
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 People's Republic of China
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical SciencesGuangxi Normal University Guilin 541004 People's Republic of China
| | - Yu Sun
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical SciencesGuangxi Normal University Guilin 541004 People's Republic of China
| | - Yan Yao
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical SciencesGuangxi Normal University Guilin 541004 People's Republic of China
| | - Hai‐Tao Tang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical SciencesGuangxi Normal University Guilin 541004 People's Republic of China
| | - Jia‐Rong Li
- School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 People's Republic of China
| | - Ying‐Ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical SciencesGuangxi Normal University Guilin 541004 People's Republic of China
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11
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Karpe AS, Sathe PA, Patil P, Patil BN, Chaskar AC. Metal free oxidative C C bond cleavage: Facile and one-pot tandem synthesis of benzothiadiazine-1,1-dioxides. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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12
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Pirotte B, Florence X, Goffin E, Lebrun P. 2,2-Dimethyl-3,4-dihydro-2 H-1,4-benzoxazines as isosteres of 2,2-dimethylchromans acting as inhibitors of insulin release and vascular smooth muscle relaxants. MEDCHEMCOMM 2019; 10:431-438. [PMID: 31015906 DOI: 10.1039/c8md00593a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/01/2019] [Indexed: 11/21/2022]
Abstract
The present study describes the synthesis and biological evaluation of 4-phenylureido/thioureido-substituted 2,2-dimethyl-3,4-dihydro-2H-1,4-benzoxazines as isosteres of corresponding 2,2-dimethylchromans reported to be pancreatic β-cell KATP channel openers. The benzoxazines were found to be less active as inhibitors of the glucose-induced insulin release than their corresponding chromans, while the myorelaxant activity of some 4-arylureido-substituted benzoxazines was more pronounced than that exhibited by their chroman counterparts. The myorelaxant activity of the most potent benzoxazine 8e was further characterized on rat aortic rings precontracted by 30 mM KCl in the presence of glibenclamide (10 μM) or precontracted by 80 mM extracellular KCl. Our findings indicate that, on vascular smooth muscle cells, the benzoxazine 8e mainly behaved as a calcium entry blocker.
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Affiliation(s)
- Bernard Pirotte
- Laboratoire de Chimie Pharmaceutique , Center for Interdisciplinary Research on Medicines (CIRM) , Université de Liège , Quartier Hôpital , Avenue Hippocrate 15 , B-4000 Liège , Belgium .
| | - Xavier Florence
- Laboratoire de Chimie Pharmaceutique , Center for Interdisciplinary Research on Medicines (CIRM) , Université de Liège , Quartier Hôpital , Avenue Hippocrate 15 , B-4000 Liège , Belgium . .,Laboratoire de Physiologie et Pharmacologie , Université Libre de Bruxelles , Faculté de Médecine , 808 Route de Lennik , B-1070 Bruxelles , Belgium
| | - Eric Goffin
- Laboratoire de Chimie Pharmaceutique , Center for Interdisciplinary Research on Medicines (CIRM) , Université de Liège , Quartier Hôpital , Avenue Hippocrate 15 , B-4000 Liège , Belgium .
| | - Philippe Lebrun
- Laboratoire de Physiologie et Pharmacologie , Université Libre de Bruxelles , Faculté de Médecine , 808 Route de Lennik , B-1070 Bruxelles , Belgium
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13
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Bouhedja M, Peres B, Fhayli W, Ghandour Z, Boumendjel A, Faury G, Khelili S. Design, synthesis and biological evaluation of novel ring-opened cromakalim analogues with relaxant effects on vascular and respiratory smooth muscles and as stimulators of elastin synthesis. Eur J Med Chem 2018; 144:774-796. [DOI: 10.1016/j.ejmech.2017.12.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 12/17/2017] [Accepted: 12/18/2017] [Indexed: 11/27/2022]
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14
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Pirotte B, Florence X, Goffin E, Lebrun P. Deciphering Structure-Activity Relationships in a Series of 2,2-Dimethylchromans Acting as Inhibitors of Insulin Release and Smooth Muscle Relaxants. ChemMedChem 2017; 12:1810-1817. [DOI: 10.1002/cmdc.201700409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/20/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Bernard Pirotte
- Laboratoire de Chimie Pharmaceutique; Center for Interdisciplinary Research on Medicines (CIRM); Université de Liège; Quartier Hôpital, Avenue Hippocrate 15 4000 Liège Belgium
| | - Xavier Florence
- Laboratoire de Chimie Pharmaceutique; Center for Interdisciplinary Research on Medicines (CIRM); Université de Liège; Quartier Hôpital, Avenue Hippocrate 15 4000 Liège Belgium
- Laboratoire de Physiologie et Pharmacologie; Université Libre de Bruxelles; Faculté de Médecine; 808 Route de Lennik 1070 Bruxelles Belgium
| | - Eric Goffin
- Laboratoire de Chimie Pharmaceutique; Center for Interdisciplinary Research on Medicines (CIRM); Université de Liège; Quartier Hôpital, Avenue Hippocrate 15 4000 Liège Belgium
| | - Philippe Lebrun
- Laboratoire de Physiologie et Pharmacologie; Université Libre de Bruxelles; Faculté de Médecine; 808 Route de Lennik 1070 Bruxelles Belgium
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15
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Xi LY, Zhang RY, Shi L, Chen SY, Yu XQ. Iodine-mediated synthesis of 3-acylbenzothiadiazine 1,1-dioxides. Beilstein J Org Chem 2016; 12:1072-8. [PMID: 27340493 PMCID: PMC4902049 DOI: 10.3762/bjoc.12.101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 05/11/2016] [Indexed: 12/19/2022] Open
Abstract
An iodine-mediated synthesis of 3-acylbenzothiadizine 1,1-dioxides is described. A range of electronically diverse acetophenones reacted well with several 2-aminobenzenesulfonamides, affording 3-acylbenzothiadiazine 1,1-dioxides in good yields.
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Affiliation(s)
- Long-Yi Xi
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Ruo-Yi Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Lei Shi
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Shan-Yong Chen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
| | - Xiao-Qi Yu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
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16
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Kumar PPS, Suchetan PA, Sreenivasa S, Naveen S, Lokanath NK, Kumar DBA. Molecular and crystal structures of two 1,2,4-benzothiadiazine derivatives. J STRUCT CHEM+ 2015. [DOI: 10.1134/s0022476615070215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Shinoj Kumar PP, Suchetan PA, Sreenivasa S, Naveen S, Lokanath NK, Aruna Kumar DB. Crystal structure of (R)-6'-bromo-3,3-dimethyl-3',4'-di-hydro-2'H-spiro-[cyclo-hexane-1,3'-1,2,4-benzo-thia-diazine] 1',1'-dioxide. Acta Crystallogr Sect E Struct Rep Online 2014; 70:359-61. [PMID: 25484745 PMCID: PMC4257282 DOI: 10.1107/s1600536814022417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 10/12/2014] [Indexed: 11/10/2022]
Abstract
In the title compound, C14H19BrN2O2S, the 1,2,4-thia-diazinane ring adopts an envelope conformation with the N atom (attached to the sulfonyl group) as the flap, while the cyclo-hexane ring adopts a chair conformation. The mean plane of the cyclo-hexane ring is almost normal to the benzene ring and the mean plane of the 1,2,4-thia-diazinane ring, making dihedral angles of 70.4 (2) and 71.43 (19)°, respectively. Furthermore, the dihedral angle between the benzene ring and the mean plane of the 1,2,4-thia-diazinane ring is 4.91 (18)°. The mol-ecular structure is stabilized by an intra-molecular C-H⋯O hydrogen bond, which encloses an S(6) ring motif. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds into chains along [10-1], forming a C(6) graph-set motif. These chains are inter-connected via C-H⋯π inter-actions, leading to chains along [-101], so finally forming sheets parallel to (010).
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Affiliation(s)
- P P Shinoj Kumar
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572 103, India
| | - P A Suchetan
- Department of Studies and Research in Chemistry, U.C.S., Tumkur University, Tumkur 572 013, India
| | - S Sreenivasa
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572 103, India
| | - S Naveen
- Institution of Excellence, Vijnana Bhavan, University of Mysore, Manasagangotri, India
| | - N K Lokanath
- Department of Studies in Physics, University of Mysore, Manasagangotri, Mysore, India
| | - D B Aruna Kumar
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572 103, India
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18
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Kolesnik NP, Rozhenko AB, Kinzhybalo V, Lis T, Shermolovich YG. 1-Oxo-1-fluoro-1,2,4-benzothiadiazines—A new type of cyclic sulfonimidoyl fluorides. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.01.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Sharif M, Opalach J, Langer P, Beller M, Wu XF. Oxidative synthesis of quinazolinones and benzothiadiazine 1,1-dioxides from 2-aminobenzamide and 2-aminobenzenesulfonamide with benzyl alcohols and aldehydes. RSC Adv 2014. [DOI: 10.1039/c3ra45765f] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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20
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Constant-Urban C, Charif M, Goffin E, Van Heugen JC, Elmoualij B, Chiap P, Mouithys-Mickalad A, Serteyn D, Lebrun P, Pirotte B, De Tullio P. Triphenylphosphonium salts of 1,2,4-benzothiadiazine 1,1-dioxides related to diazoxide targeting mitochondrial ATP-sensitive potassium channels. Bioorg Med Chem Lett 2013; 23:5878-81. [DOI: 10.1016/j.bmcl.2013.08.091] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 08/22/2013] [Accepted: 08/26/2013] [Indexed: 01/03/2023]
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21
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Majumdar KC, Ganai S. Facile synthesis of benzothiadiazine 1,1-dioxides, a precursor of RSV inhibitors, by tandem amidation/intramolecular aza-Wittig reaction. Beilstein J Org Chem 2013; 9:503-9. [PMID: 23616790 PMCID: PMC3629032 DOI: 10.3762/bjoc.9.54] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Accepted: 02/07/2013] [Indexed: 01/22/2023] Open
Abstract
Reaction of o-azidobenzenesulfonamides with ethyl carbonochloridate afforded the corresponding amide derivatives, which gave 3-ethoxy-1,2,4-benzothiadiazine 1,1-dioxides through an intramolecular aza-Wittig reaction. The reaction was found to be general through the synthesis of a number of benzothiadiazine 1,1-dioxides. Acid-catalyzed hydrolysis of 3-ethoxy-1,2,4-benzothiadiazine 1,1-dioxides furnished the 2-substituted benzothiadiazine-3-one 1,1-dioxides in good yields and high purity, which is the core moiety of RSV inhibitors.
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Affiliation(s)
- Krishna C Majumdar
- Department of Chemistry, University of Kalyani, Kalyani 741235, W.B India
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22
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Kumar SK, Rambabu D, Kumar CHV, Sreenivas BY, Prasad KRS, Rao MVB, Pal M. Catalysis by Amberlyst-15 under ultrasound in water: a green synthesis of 1,2,4-benzothiadiazine-1,1-dioxides and their spiro derivatives. RSC Adv 2013. [DOI: 10.1039/c3ra44703k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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