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Králová P, Ručilová V, Soural M. Polymer-Supported Syntheses of Heterocycles Bearing Oxazine and Thiazine Scaffolds. ACS COMBINATORIAL SCIENCE 2018; 20:529-543. [PMID: 30040392 DOI: 10.1021/acscombsci.8b00076] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this review, we summarize synthetic approaches to preparing single or fused oxazine and thiazine derivatives using solid-phase synthesis (SPS). The literature survey revealed that diverse compounds bearing variously functionalized 1,2-oxazine, 1,3-oxazine, or 1,4-oxazine scaffolds and the corresponding thiazines are accessible by SPS. The latest contributions involving the stereoselective polymer-supported syntheses of morpholines indicate that the field is continuing to expand.
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Affiliation(s)
- Petra Králová
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Veronika Ručilová
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00, Olomouc, Czech Republic
| | - Miroslav Soural
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00, Olomouc, Czech Republic
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Králová P, Maloň M, Koshino H, Soural M. Convenient Synthesis of Thiohydantoins, Imidazole-2-thiones and Imidazo[2,1- b]thiazol-4-iums from Polymer-Supported α-Acylamino Ketones. Molecules 2018; 23:molecules23040976. [PMID: 29690582 PMCID: PMC6017016 DOI: 10.3390/molecules23040976] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 04/18/2018] [Accepted: 04/20/2018] [Indexed: 11/16/2022] Open
Abstract
The preparation of 5-methylene-thiohydantoins using solid-phase synthesis is reported in this paper. After sulfonylation of immobilized Ser (t-Bu)-OH with 4-nitrobenzenesulfonyl chloride followed by alkylation with various bromoketones, the 4-Nos group was removed and the resulting polymer-supported α-acylamino ketones reacted with Fmoc-isothiocyanate. Cleavage of the Fmoc protecting group was followed by the spontaneous cyclative cleavage releasing the 5-methylene-thiohydantoin derivatives from the polymer support. Reduction with triethylsilane (TES) yielded the corresponding 5-methyl-thiohydantoins. When Fmoc-isothiocyanate was replaced with alkyl isothiocyanates, the trifluoroacetic acid (TFA) mediated cleavage from the polymer support, which was followed by the cyclization reaction and the imidazo[2,1-b]thiazol-4-iums were obtained. Their conversion in deuterated dimethylsulfoxide led to imidazole-2-thiones.
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Affiliation(s)
- Petra Králová
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Michal Maloň
- JEOL Ltd., Musashino 3-1-2, Akishima, Tokyo 196-8558, Japan.
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
| | - Miroslav Soural
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hnevotinska 5, 779 00 Olomouc, Czech Republic.
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Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali University, Banasthali, India
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Králová P, Maloň M, Volná T, Ručilová V, Soural M. Polymer-Supported Stereoselective Synthesis of Benzoxazino[4,3-b][1,2,5]thiadiazepinone 6,6-dioxides. ACS COMBINATORIAL SCIENCE 2017; 19:670-674. [PMID: 28825802 DOI: 10.1021/acscombsci.7b00115] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we report the stereoselective synthesis of trisubstituted benzoxazino[4,3-b][1,2,5]thiadiazepinone 6,6-dioxides from polymer-supported Fmoc-Ser(tBu)-OH and Fmoc-Thr(tBu)-OH. After the solid-phase synthesis of N-alkylated-N-sulfonylated intermediates using various 2-nitrobenzenesulfonyl chlorides and bromoketones, the target compounds were obtained via trifluoroacetic acid (TFA)-mediated cleavage from the resin, followed by cyclization of the diazepinone scaffold. Except for the threonine-based intermediates, the inclusion of triethylsilane (TES) in the cleavage cocktail yielded a specific configuration of the newly formed C3 chiral center. The final cyclization resulted in minor or no inversion of the C12a stereocenter configuration.
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Affiliation(s)
- Petra Králová
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 771 46 Olomouc, Czech Republic
| | - Michal Maloň
- JEOL Resonance, Inc., Musashino
3-1-2, Akishima, Tokyo 196-8558, Japan
| | - Tereza Volná
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 771 46 Olomouc, Czech Republic
| | - Veronika Ručilová
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
| | - Miroslav Soural
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
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Králová P, Fülöpová V, Maloň M, Volná T, Popa I, Soural M. Stereoselective Polymer-Supported Synthesis of Morpholine- and Thiomorpholine-3-carboxylic Acid Derivatives. ACS COMBINATORIAL SCIENCE 2017; 19:173-180. [PMID: 28085245 DOI: 10.1021/acscombsci.6b00178] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Herein we report the polymer-supported synthesis of 3,4-dihydro-2H-1,4-oxazine-3-carboxylic acid derivatives using immobilized Fmoc-Ser(tBu)-OH and Fmoc-Thr(tBu)-OH as the starting materials. After the solid-phase-synthesis of N-alkyl-N-sulfonyl/acyl intermediates, the target dihydrooxazines were obtained using trifluoroacetic acid-mediated cleavage from the resin. This approach was also studied for the preparation of dihydrothiazines from immobilized Fmoc-Cys(Trt)-OH. Inclusion of triethylsilane in the cleavage cocktail resulted in the stereoselective formation of the corresponding morpholine/thiomorpholine-3-carboxylic acids. Stereochemical studies revealed the specific configuration of the newly formed stereocenter and also the formation of stable N-acylmorpholine rotamers.
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Affiliation(s)
- Petra Králová
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Veronika Fülöpová
- Institute
of Molecular and Translation Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
| | - Michal Maloň
- JEOL Resonance Inc., Musashino
3-1-2, Akishima, Tokyo 196-8558, Japan
| | - Tereza Volná
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Igor Popa
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Miroslav Soural
- Institute
of Molecular and Translation Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00 Olomouc, Czech Republic
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Tan D, Friščić T. Carbodiimide insertion into sulfonimides: one-step route to azepine derivatives via a two-atom saccharin ring expansion. Chem Commun (Camb) 2016; 53:901-904. [PMID: 28008434 DOI: 10.1039/c6cc07331j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A previously unknown insertion of carbodiimides into sulfonimides enables the first one-step, two-atom expansion of the saccharin 5-membered ring into a 7-membered benzo[1,2,4]thiadiazepine, and a two-atom chain extension of a non-cyclic sulfonimide. This reaction is enhanced by copper salts, which allow it to be conducted mechanochemically, in a solvent-free manner.
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Affiliation(s)
- Davin Tan
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W. H3A 0B8 Montreal, Canada.
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Trapani P, Volná T, Soural M. Solid-Phase Synthesis of 2,3-Dihydrobenzo[f][1,2,5]thiadiazepin-4(5H)-one 1,1-Dioxides with Three Diversity Positions. ACS COMBINATORIAL SCIENCE 2016; 18:349-54. [PMID: 27163513 DOI: 10.1021/acscombsci.6b00049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthesis of 2,3-dihydrobenzo[f][1,2,5]thiadiazepin-4(5H)-one 1,1-dioxides from polymer-supported α-amino acids is described herein. Different α-amino acids immobilized on Wang resin were sulfonylated with various 2-nitrobenzenesulfonyl chlorides. The resulting 2-nitrobenzenesulfonamides were alkylated with alcohols according to the Fukuyama-Mitsunobu procedure. After reduction of the nitro group and cleavage from the polymer support, the final intermediates were reacted with thionyl chloride, and target compounds of good crude purity and acceptable overall yields were obtained. The chiral HPLC studies revealed the impact of the cyclization step on the resulting stereochemistry. The developed strategy allows for simple production of desired compounds with the application of parallel/combinatorial solid-phase synthesis using commercially available building blocks.
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Affiliation(s)
- Patricia Trapani
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 771 46 Olomouc, Czech Republic
| | - Tereza Volná
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 771 46 Olomouc, Czech Republic
| | - Miroslav Soural
- Department
of Organic Chemistry, Faculty of Science, Palacký University, 771 46 Olomouc, Czech Republic
- Institute
of Molecular and Translation Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 779 00, Olomouc, Czech Republic
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Schütznerová E, Krchňák V. N-Oxide as an Intramolecular Oxidant in the Baeyer-Villiger Oxidation: Synthesis of 2-Alkyl-2H-indazol-3-yl Benzoates and 2-Alkyl-1,2-dihydro-3H-indazol-3-ones. J Org Chem 2016; 81:3585-96. [PMID: 27035416 DOI: 10.1021/acs.joc.6b00251] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we describe the intramolecular Baeyer-Villiger oxidation of ketones to esters using N-oxide. 2-Nitro-N-alkyl-N-(2-oxo-2-phenylethyl)benzenesulfonamide compounds are known to undergo base-mediated C-arylation followed by N-N bond formation, producing unstable five-membered ring intermediates that spontaneously dehydrate to indazole oxides. We identified the reaction conditions under which the cyclic intermediate undergoes acid-mediated intramolecular Baeyer-Villiger oxidation of the ketone in which N-oxide serves as the intramolecular oxidizing agent. The solid-phase synthesis plays a critical role in the successful transformation, allowing rapid access to the unstable but Baeyer-Villiger oxidation-prone intermediate. This synthetic route provides practical access to 2-alkyl-2H-indazol-3-yl benzoates and 2-alkyl-1,2-dihydro-3H-indazol-3-ones, which are known privileged structures possessing remarkable diverse pharmacologically relevant activities.
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Affiliation(s)
- Eva Schütznerová
- Department of Organic Chemistry, Faculty of Science, Palacký University , 17. listopadu 12, 771 46 Olomouc, Czech Republic
| | - Viktor Krchňák
- Department of Organic Chemistry, Faculty of Science, Palacký University , 17. listopadu 12, 771 46 Olomouc, Czech Republic.,Department of Chemistry and Biochemistry, 251 Nieuwland Science Center, University of Notre Dame , Notre Dame, Indiana 46556, United States
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Fülöpová V, Soural M. Mining the Chemical Space: Application of 2/4-Nitrobenzenesulfonamides in Solid-Phase Synthesis. ACS COMBINATORIAL SCIENCE 2015; 17:570-91. [PMID: 26325251 DOI: 10.1021/acscombsci.5b00089] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polymer-supported benzenesulfonamides prepared from various immobilized primary amines and 2/4-nitrobenzenesulfonyl chloride have been used as key intermediates in different chemical transformations, including unusual rearrangements to yield a number of diverse privileged scaffolds. This review summarizes individual strategies in their application to date.
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Affiliation(s)
- Veronika Fülöpová
- Department of Organic Chemistry,
Institute of Molecular and Translational Medicine, Faculty of Science, Palacky University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
| | - Miroslav Soural
- Department of Organic Chemistry,
Institute of Molecular and Translational Medicine, Faculty of Science, Palacky University, 17 listopadu 12, 771 46 Olomouc, Czech Republic
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Fülöpová V, Funk P, Popa I, McMaster C, Soural M. Solid-Phase Synthesis of Trisubstituted Benzo[f][1,2,3]triazolo[1,5-a][1,4]diazepin-6(5H)-ones and Their Sulfonyl Analogues under Mild Reaction Conditions. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500314] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schütznerová E, Krchňák V. Solid-phase synthesis of 2-aryl-3-alkylamino-1H-indoles from 2-nitro-N-(2-oxo-2-arylethyl)benzenesulfonamides via base-mediated C-arylation. ACS COMBINATORIAL SCIENCE 2015; 17:137-46. [PMID: 25547263 DOI: 10.1021/co500167g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Polymer-supported 2-nitro-N-(2-oxo-2-arylethyl)benzenesulfonamides, prepared from resin-bound amines by sulfonylation with 2-nitrobenzenesulfonyl chlorides followed by alkylation with α-bromoacetophenones, represent advanced intermediates for the synthesis of different nitrogenous heterocycles. We report their application for the synthesis of 2-aryl-3-alkylamino-1H-indoles via base-mediated C-arylation reactions followed by the reduction of the C-arylated intermediates. Linear precursors for C-arylation were prepared on solid-phase support from simple, commercially available building blocks. The effects of different substituents on the amino and aryl groups were addressed.
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Affiliation(s)
- Eva Schütznerová
- Department of Organic
Chemistry, Faculty of Science, Palacký University, 17. Listopadu
12, 771 46 Olomouc, Czech Republic
| | - Viktor Krchňák
- Department of Organic
Chemistry, Faculty of Science, Palacký University, 17. Listopadu
12, 771 46 Olomouc, Czech Republic
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Center, Notre Dame, Indiana 46556, United States
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Fülöpová V, Krchňáková A, Schütznerová E, Zajíček J, Krchňák V. Ring Contraction of 2,5-Dihydrobenzo[f][1,2,5]thiadiazepine 1,1-Dioxides: Access to 4H-Benzo[b][1,4]thiazine 1,1-Dioxides. J Org Chem 2015; 80:1795-801. [DOI: 10.1021/jo502713k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Veronika Fülöpová
- Department of Organic
Chemistry, Institute of Molecular and Translational Medicine, Faculty
of Science, Palacky University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
| | - Anna Krchňáková
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Center, Notre Dame, Indiana 46556, United States
| | - Eva Schütznerová
- Department of Organic
Chemistry, Institute of Molecular and Translational Medicine, Faculty
of Science, Palacky University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
| | - Jaroslav Zajíček
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Center, Notre Dame, Indiana 46556, United States
| | - Viktor Krchňák
- Department of Organic
Chemistry, Institute of Molecular and Translational Medicine, Faculty
of Science, Palacky University, 17. Listopadu 12, 771 46 Olomouc, Czech Republic
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Center, Notre Dame, Indiana 46556, United States
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