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Lystsova EA, Novokshonova AD, Khramtsov PV, Novikov AS, Dmitriev MV, Maslivets AN, Khramtsova EE. Reaction of Pyrrolobenzothiazines with Schiff Bases and Carbodiimides: Approach to Angular 6/5/5/5-Tetracyclic Spiroheterocycles. Molecules 2024; 29:2089. [PMID: 38731580 PMCID: PMC11085407 DOI: 10.3390/molecules29092089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024] Open
Abstract
1H-Pyrrole-2,3-diones, fused at [e]-side with a heterocycle, are suitable platforms for the synthesis of various angular polycyclic alkaloid-like spiroheterocycles. Recently discovered sulfur-containing [e]-fused 1H-pyrrole-2,3-diones (aroylpyrrolobenzothiazinetriones) tend to exhibit unusual reactivity. Based on these peculiar representatives of [e]-fused 1H-pyrrole-2,3-diones, we have developed an approach to an unprecedented 6/5/5/5-tetracyclic alkaloid-like spiroheterocyclic system of benzo[d]pyrrolo[3',4':2,3]pyrrolo[2,1-b]thiazole via their reaction with Schiff bases and carbodiimides. The experimental results have been supplemented with DFT computational studies. The synthesized alkaloid-like 6/5/5/5-tetracyclic compounds have been tested for their biotechnological potential as growth stimulants in the green algae Chlorella vulgaris.
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Affiliation(s)
- Ekaterina A. Lystsova
- Department of Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia; (E.A.L.); (M.V.D.); (A.N.M.)
| | - Anastasia D. Novokshonova
- Department of Biology, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia; (A.D.N.); (P.V.K.)
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Research Center, The Ural Branch of Russian Academy of Sciences, ul. Goleva, 13, 614081 Perm, Russia
| | - Pavel V. Khramtsov
- Department of Biology, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia; (A.D.N.); (P.V.K.)
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Research Center, The Ural Branch of Russian Academy of Sciences, ul. Goleva, 13, 614081 Perm, Russia
| | - Alexander S. Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia;
- Research Institute of Chemistry, Peoples’ Friendship University of Russia (RUDN University), ul. Miklukho-Maklaya, 6, 117198 Moscow, Russia
| | - Maksim V. Dmitriev
- Department of Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia; (E.A.L.); (M.V.D.); (A.N.M.)
| | - Andrey N. Maslivets
- Department of Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia; (E.A.L.); (M.V.D.); (A.N.M.)
| | - Ekaterina E. Khramtsova
- Department of Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia; (E.A.L.); (M.V.D.); (A.N.M.)
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Lystsova EA, Novikov AS, Dmitriev MV, Maslivets AN, Khramtsova EE. Approach to Pyrido[2,1- b][1,3]benzothiazol-1-ones via In Situ Generation of Acyl(1,3-benzothiazol-2-yl)ketenes by Thermolysis of Pyrrolo[2,1- c][1,4]benzothiazine-1,2,4-triones. Molecules 2023; 28:5495. [PMID: 37513367 PMCID: PMC10385387 DOI: 10.3390/molecules28145495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/13/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
Acyl(imidoyl)ketenes are highly reactive heterocumulenes that enable diversity-oriented synthesis of various drug-like heterocycles. Such ketenes, bearing heterocyclic substituents, afford angularly fused pyridin-2(1H)-ones in their [4+2]-cyclodimerization reactions. We have utilized this property for the development of a new synthetic approach to pharmaceutically interesting pyrido[2,1-b][1,3]benzothiazol-1-ones via the [4+2]-cyclodimerization of acyl(1,3-benzothiazol-2-yl)ketenes generated in situ. The thermal behaviors of 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones and 3-benzoylpyrrolo[2,1-b][1,3]benzothiazole-1,2-dione (two new types of [e]-fused 1H-pyrrole-2,3-diones reported by us recently) have been studied by thermal analysis and HPLC to elucidate their capability to be a source of acyl(1,3-benzothiazol-2-yl)ketenes. As a result, we have found that only 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones are suitable for this. The experimental results are supplemented with computational studies that demonstrate that thermolysis of 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones proceeds through an unprecedented cascade of two thermal decarbonylations. Based on these studies, we discovered a novel mode of thermal transformation of [e]-fused 1H-pyrrole-2,3-diones and developed a new pot, atom, and step economic synthetic approach to pyrido[2,1-b][1,3]benzothiazol-1-ones. The synthesized drug-like pyrido[2,1-b][1,3]benzothiazol-1-ones are of interest to pharmaceutics, since their close analogs show significant antiviral activity.
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Affiliation(s)
- Ekaterina A Lystsova
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia
- Research Institute of Chemistry, Рeoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street, 6, 117198 Moscow, Russia
| | - Maksim V Dmitriev
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
| | - Andrey N Maslivets
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
| | - Ekaterina E Khramtsova
- Department of Organic Chemistry, Perm State University, ul. Bukireva, 15, 614990 Perm, Russia
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Lystsova EA, Dmitriev MV, Maslivets AN, Khramtsova EE. Nucleophile-induced ring contraction in pyrrolo[2,1- c][1,4]benzothiazines: access to pyrrolo[2,1- b][1,3]benzothiazoles. Beilstein J Org Chem 2023; 19:646-657. [PMID: 37205130 PMCID: PMC10186265 DOI: 10.3762/bjoc.19.46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 05/04/2023] [Indexed: 05/21/2023] Open
Abstract
Pyrrolo[2,1-b][1,3]benzothiazoles are an important class of fused sulfur and nitrogen-containing heterocycles intensively studied in medicinal chemistry and pharmacology. In the present paper, a new synthetic approach to pyrrolobenzothiazoles is developed based on 1,4-thiazine ring contraction in 3-aroylpyrrolo[2,1-c][1,4]benzothiazine-1,2,4-triones under the action of nucleophiles. The proposed approach works well with alkanols, benzylamine, and arylamines. The scope and limitations of the developed approach are studied. The synthesized pyrrolobenzothiazole derivatives represent an interest to pharmaceutics, since their close analogs show CENP-E inhibitory activity, interesting for the targeted cancer therapy development.
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Affiliation(s)
- Ekaterina A Lystsova
- Department of Chemistry, Perm State University, ul. Bukireva 15, Perm 614990, Russian Federation
| | - Maksim V Dmitriev
- Department of Chemistry, Perm State University, ul. Bukireva 15, Perm 614990, Russian Federation
| | - Andrey N Maslivets
- Department of Chemistry, Perm State University, ul. Bukireva 15, Perm 614990, Russian Federation
| | - Ekaterina E Khramtsova
- Department of Chemistry, Perm State University, ul. Bukireva 15, Perm 614990, Russian Federation
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Topanov PA, Maslivets AA, Dmitriev MV, Mashevskaya IV, Shklyaev YV, Maslivets AN. A facile approach to spiro[dihydrofuran-2,3'-oxindoles] via formal [4 + 1] annulation reaction of fused 1 H-pyrrole-2,3-diones with diazooxindoles. Beilstein J Org Chem 2022; 18:1532-1538. [DOI: 10.3762/bjoc.18.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/03/2022] [Indexed: 11/12/2022] Open
Abstract
There has been developed an easy synthetic approach to spiro[dihydrofuran-2,3'-oxindoles] via a highly diastereoselective formal [4 + 1] cycloaddition reaction of [e]-fused 1H-pyrrole-2,3-diones with diazooxindoles. The described novel heterocyclic systems are heteroanalogues of antimicrobial and antibiofilm fungal metabolites. The developed reaction represents the first example of involving 1H-pyrrole-2,3-diones fused at the [e]-side in a [4 + 1] annulation reaction.
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Cycloaddition of 4-Acyl-1H-pyrrole-2,3-diones Fused at [e]-Side and Cyanamides: Divergent Approach to 4H-1,3-Oxazines. Molecules 2022; 27:molecules27165257. [PMID: 36014497 PMCID: PMC9414543 DOI: 10.3390/molecules27165257] [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: 07/25/2022] [Revised: 08/11/2022] [Accepted: 08/16/2022] [Indexed: 11/16/2022] Open
Abstract
4-Acyl-1H-pyrrole-2,3-diones fused at [e]-side with a heterocyclic moiety are suitable platforms for the development of a hetero-Diels–Alder-reaction-based, diversity-oriented approaches to series of skeletally diverse heterocycles. These platforms are known to react as oxa-dienes with dienophiles to form angular 6/6/5/6-tetracyclic alkaloid-like heterocycles and are also prone to decarbonylation at high temperatures resulting in generation of acyl(imidoyl)ketenes, bidentate aza- and oxa-dienes, which can react with dienophiles to form skeletally diverse products (angular tricyclic products or heterocyclic ensembles). Based on these features, we have developed an approach to two series of skeletally diverse 4H-1,3-oxazines (tetracyclic alkaloid-like 4H-1,3-oxazines and 5-heteryl-4H-1,3-oxazines) via a hetero-Diels–Alder reaction of 4-acyl-1H-pyrrole-2,3-diones fused at [e]-side with cyanamides. The products of these transformations are of interest for drug discovery, since compounds bearing 4H-1,3-oxazine moiety are extensively studied for inhibitory activities against anticancer targets.
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Borra S, Chae S, Kim HY, Oh K. Continuous Flow Synthesis of 1,4-Benzothiazines Using Ambivalent Reactivity of ( E)-β-Chlorovinyl Ketones: A Point of Reaction Control Enabled by Flow Chemistry. Org Lett 2022; 24:5287-5292. [PMID: 35848887 DOI: 10.1021/acs.orglett.2c01865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A continuous flow system to 1,4-benzothiazines was developed using the point of reaction control, where the ambivalent (E)-β-chlorovinyl ketones and 2,2'-dithiodianilines were confined in a diffusion controlled flow setting. The successful segregation of reactive chemical species in a flow setting allowed more defined reaction pathways that are not feasible in traditional batch reaction conditions. The point of reaction control in flow systems helps to execute the reactions often plagued with the concurrent generation of multiple chemical species.
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Affiliation(s)
- Satheesh Borra
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul 06974, Republic of Korea
| | - Soyeon Chae
- Department of Global Innovative Drugs, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul 06974, Republic of Korea
| | - Hun Young Kim
- Department of Global Innovative Drugs, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul 06974, Republic of Korea
| | - Kyungsoo Oh
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul 06974, Republic of Korea
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