1
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Tkachenko IM, Shiryaev VA, Klimochkin YN. Towards a qualitative understanding of the carbonyl reactivity of α-substituted ethyl 5-oxohomoadamantyl-4-carboxylates. Org Biomol Chem 2023. [PMID: 37377423 DOI: 10.1039/d3ob00777d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Substituted ethyl 5-oxohomoadamantane-4-carboxylates were subjected to reactions with several nucleophiles to establish some aspects of the carbonyl reactivity. However, only one example of the desired Claisen retro-reaction was observed as 3,7-disubstituted bicyclo[3.3.1]nonane formation. Most of the reactions yielded α-substituted homoadamantan-5-ones or some products of their further transformations. Reductive amination of substituted homoadamantane-5-ones gave several homoadamantane-fused nitrogen heterocycles, which could be considered as GABA- and/or ∂-aminovaleric acid analogues. Reduction products of several substituted ketones were observed as single products when treated with organomagnesium reagents. These deviations from the general chemical reactivity patterns are associated with steric factors and the geometry of the cage unit and could be a particular case, which is reflecting the overall specificity of the chemistry of cage carbonyl compounds.
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Affiliation(s)
- Ilya M Tkachenko
- Samara State Technical University, 244, Molodogvardeyskaya st, Samara, 443100, Russian Federation.
| | - Vadim A Shiryaev
- Samara State Technical University, 244, Molodogvardeyskaya st, Samara, 443100, Russian Federation.
| | - Yuri N Klimochkin
- Samara State Technical University, 244, Molodogvardeyskaya st, Samara, 443100, Russian Federation.
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2
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Yamaguchi E. [Development of Molecular Transformation Reactions Using Visible Light and Main Group Elements]. YAKUGAKU ZASSHI 2023; 143:693-699. [PMID: 37661434 DOI: 10.1248/yakushi.23-00091] [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] [Indexed: 09/05/2023]
Abstract
Owing to their ability to induce excitation of specific molecular orbitals or initiate chemical reactions, photochemical reactions have the potential to be more effective at selectively activating target molecules than thermal reactions. The thermal reactions transfer thermal energy to activate molecules, which often leads to the activation of multiple molecular species, including undesired ones, resulting in non-selectivity. This nonselectivity may result in undesirable side reactions or decrease reaction efficiency. Additionally, photochemical reactions can induce selective activation by absorbing specific wavelengths of light. However, visible light-driven photocatalytic reactions typically require expensive transition metal catalysts or organic dyes, leaving plenty of room for improvement. To address the aforementioned issues, the photochemical properties of the main group elements, such as halogens, were optimized and methodologies for visible light-induced reactions were developed. Activation of molecular halogen, halogen-carbon bonds, and halogen bonding interactions were independently investigated and various methodologies were reported. These developed reactions are excellent methodologies that use inexpensive raw materials and are thus predicted to contribute significantly toward sustainability.
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Affiliation(s)
- Eiji Yamaguchi
- Department of Pharmacy, Gifu Pharmaceutical University
- Center for One Medicine Innovative Translational Research, Gifu University
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3
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Zhou B, Yuan Z, Yu J, Luan X. Dearomatization/Deiodination of o-Iodophenolic Compounds with α,β-Unsaturated Imines for Accessing Benzofuran Derivatives. Org Lett 2022; 24:837-841. [PMID: 35019655 DOI: 10.1021/acs.orglett.1c04065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A dearomatization/deiodination/rearomatization strategy for the [3 + 2] cyclization of o-iodophenolic substrates with α,β-unsaturated imines to construct various dihydrobenzofuran-related skeletons has been established. Tolerance to different functional groups has been tested. Mechanistic studies revealed that this domino reaction was possibly realized by the deiodination and tautomerization of the key dearomatized intermediate to generate a free phenolic O radical. Moreover, an anticancer agent 4 and an α-glucosidase inhibitor 5 with high bioactivities were successfully synthesized using this novel protocol.
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Affiliation(s)
- Bigui Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Zhiwei Yuan
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Jingxun Yu
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
| | - Xinjun Luan
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China
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4
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Takeda M, Maejima S, Yamaguchi E, Itoh A. Iodine-mediated direct α-amination of dimethyl methylmalonate using non-protected amines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Ren MZ, Yang YH, Zhu ZH, Zhang BS, Quan ZJ, Wang XC. Visible‐light‐Induced Sulfhydrylation and Oxylation of Olefins with Iodine as Catalyst. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ming Zhe Ren
- International Scientific and Technological Cooperation Base of Water Retention Chemical Functional Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou, Gansu 730070 P. R. China
| | - Ying Hui Yang
- International Scientific and Technological Cooperation Base of Water Retention Chemical Functional Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou, Gansu 730070 P. R. China
| | - Zheng He Zhu
- International Scientific and Technological Cooperation Base of Water Retention Chemical Functional Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou, Gansu 730070 P. R. China
| | - Bo Sheng Zhang
- International Scientific and Technological Cooperation Base of Water Retention Chemical Functional Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou, Gansu 730070 P. R. China
| | - Zheng Jun Quan
- International Scientific and Technological Cooperation Base of Water Retention Chemical Functional Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou, Gansu 730070 P. R. China
| | - Xi Cun Wang
- International Scientific and Technological Cooperation Base of Water Retention Chemical Functional Materials College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou, Gansu 730070 P. R. China
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6
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Maejima S, Yamaguchi E, Itoh A. Three-Component Iminolactonization Reaction via Bifunctionalization of Olefins Using Molecular Iodine and Visible Light. J Org Chem 2020; 85:10709-10718. [PMID: 32806099 DOI: 10.1021/acs.joc.0c01251] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel three-component γ-iminolactonization reaction was developed, which relied on the C-C/C-O bond-forming bifunctionalization of olefins using molecular iodine and visible light. This strategy did not require any (heavy) metal reagents for double-bond activation because molecular iodine acted as a rare-metal-alternative reagent through visible light irradiation. In addition, the preactivation of amines and other substrates is not required. The mechanistic investigation revealed that the generated iodine radicals under visible light irradiation reacted with alkenes to form a highly reactive intermediate; then, the three-component reaction of diiodide, malonate, and amine furnished iminolactone. Of note, the developed reaction is simple and realized the diversity-oriented synthesis innovative methodology of γ-iminolactone derivatives in drug discovery chemistry.
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Affiliation(s)
- Saki Maejima
- Gifu Pharmaceutical University, 1-25-4, Daigaku-Nishi, Gifu-shi, Gifu 501-1196, Japan
| | - Eiji Yamaguchi
- Gifu Pharmaceutical University, 1-25-4, Daigaku-Nishi, Gifu-shi, Gifu 501-1196, Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University, 1-25-4, Daigaku-Nishi, Gifu-shi, Gifu 501-1196, Japan
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7
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Oe K, Goto M, Maejima S, Yamaguchi E, Itoh A. Visible Light and Molecular Iodine‐Mediated Diastereoselective Intermolecular Lactonization of Styrenes with Carbonyls. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Karin Oe
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Mayuki Goto
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Saki Maejima
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Eiji Yamaguchi
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akichika Itoh
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
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8
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Goto M, Maejima S, Yamaguchi E, Itoh A. Regioselective Carboiodination of Styrenes:
N
‐Iodosuccinimide Affords Complete Reaction Regioselectivity. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Mayuki Goto
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Saki Maejima
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Eiji Yamaguchi
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akichika Itoh
- Laboratory of Pharmaceuticals Synthetic ChemistryGifu Pharmaceutical University 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
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9
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Chen R, Wang KK, Wang ZY, Miao C, Wang D, Zhang AA, Liu L. Synthesis of γ-Lactones by TBAI-Promoted Intermolecular Carboesterification of Carboxylic Acids with Alkenes and Alcohols. J Org Chem 2019; 84:16068-16075. [PMID: 31769673 DOI: 10.1021/acs.joc.9b02568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A novel tetrabutylammonium iodide (TBAI)-promoted three-component reaction of carboxylic acid with alkene and alcohol has been developed, which represents facile and straightforward access to polysubstituted γ-lactone skeletons in moderate-to-good yields. This methodology is distinguished by the use of a commercial catalyst and readily available starting materials, wide substrate scope, and operational simplicity. Mechanistic studies suggested that this transformation went through a radical process.
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Affiliation(s)
- Rongxiang Chen
- College of Chemistry and Chemical Engineering , Xinxiang University , Xinxiang , Henan 453000 , P. R. China
| | - Kai-Kai Wang
- College of Chemistry and Chemical Engineering , Xinxiang University , Xinxiang , Henan 453000 , P. R. China
| | - Zhan-Yong Wang
- College of Chemistry and Chemical Engineering , Xinxiang University , Xinxiang , Henan 453000 , P. R. China
| | - Changqing Miao
- College of Chemistry and Chemical Engineering , Xinxiang University , Xinxiang , Henan 453000 , P. R. China
| | - Doudou Wang
- College of Chemistry and Chemical Engineering , Xinxiang University , Xinxiang , Henan 453000 , P. R. China
| | - An-An Zhang
- College of Chemistry and Chemical Engineering , Shangqiu Normal University , Shangqiu , Henan 476000 , P. R. China
| | - Lantao Liu
- College of Chemistry and Chemical Engineering , Shangqiu Normal University , Shangqiu , Henan 476000 , P. R. China
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10
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He X, Yao XY, Chen KH, He LN. Metal-Free Photocatalytic Synthesis of exo-Iodomethylene 2-Oxazolidinones: An Alternative Strategy for CO 2 Valorization with Solar Energy. CHEMSUSCHEM 2019; 12:5081-5085. [PMID: 31671246 DOI: 10.1002/cssc.201902417] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/11/2019] [Indexed: 06/10/2023]
Abstract
A visible-light-promoted metal-free carboxylative cyclization of propargylic amines with CO2 was shown to offer exo-iodomethylene 2-oxazolidinones. Incorporation of both CO2 and iodo moieties into these compounds was realized efficiently. The mechanism study revealed that this carboxylative cyclization proceeds through a radical pathway. Notably, the iodine-functionalized 2-oxazolidinone as a platform molecule could be easily converted into a wide range of value-added chemicals through Buchwald-Hartwig, Suzuki, Sonogashira, photocatalytic ene, and photoreduction reactions. As a result, the plentiful downstream transformations remarkably enhance the range of chemicals derived from CO2 and open a potential avenue for CO2 functionalization to circumvent energy challenges in this field.
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Affiliation(s)
- Xing He
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China
| | - Xiang-Yang Yao
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China
| | - Kai-Hong Chen
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China
| | - Liang-Nian He
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China
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11
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Takeda M, Maejima S, Yamaguchi E, Itoh A. Direct lactonization from 1,3-dienes and malonate esters mediated by a combination of iodine and visible light. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151284] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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Maejima S, Yamaguchi E, Itoh A. Visible Light/Molecular-Iodine-Mediated Intermolecular Spirolactonization Reaction of Olefins with Cyclic Ketones. J Org Chem 2019; 84:9519-9531. [DOI: 10.1021/acs.joc.9b01081] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Saki Maejima
- Gifu Pharmaceutical University, 1-25-4, Daigaku-nishi, Gifu 501-1196, Japan
| | - Eiji Yamaguchi
- Gifu Pharmaceutical University, 1-25-4, Daigaku-nishi, Gifu 501-1196, Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University, 1-25-4, Daigaku-nishi, Gifu 501-1196, Japan
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13
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Maejima S, Yamaguchi E, Itoh A. trans-Diastereoselective Syntheses of γ-Lactones by Visible Light-Iodine-Mediated Carboesterification of Alkenes. ACS OMEGA 2019; 4:4856-4870. [PMID: 31459670 PMCID: PMC6648839 DOI: 10.1021/acsomega.9b00333] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 02/21/2019] [Indexed: 05/08/2023]
Abstract
This study aims to develop an intermolecular lactonization reaction of alkenes with carbonyls mediated by visible light and molecular iodine. The one-step reaction involved the carboesterification of alkenes to produce the corresponding lactones in moderate to good yield. It was also revealed that it is possible to control the diastereoselectivity of the reaction by altering the base used and the reaction conditions. When water was added as a solvent, the reaction resulted in the formation of lactones with trans-selectivity. A mechanistic investigation was undertaken and it was found that the reaction requires the generation of an iodine radical from molecular iodine, driven by visible light irradiation, and proceeds via the formation of an iodine radical alkene adduct. The proposed reaction is an example of a rare-metal free intermolecular addition cyclization reaction, which is an environment-friendly chemical process that only uses molecular iodine. In addition, since diastereoselectivity was observed without the use of any specific reagents, the developed methodology is an example of a novel stereoselective transformation using only cost-effective reagents.
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14
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Yamaguchi E, Tanaka W, Itoh A. Olefin Bifunctionalization: A Visible-light Photoredox-catalyzed Aryl Alkoxylation of Olefins. Chem Asian J 2018; 14:121-124. [DOI: 10.1002/asia.201801211] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 08/29/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Eiji Yamaguchi
- Laboratory of Pharmaceuticals Synthetic Chemistry; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Wakako Tanaka
- Laboratory of Pharmaceuticals Synthetic Chemistry; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akichika Itoh
- Laboratory of Pharmaceuticals Synthetic Chemistry; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
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15
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Maejima S, Osuka M, Yamaguchi E, Itoh A. Synthesis of bicyclic lactones via I2-mediated intramolecular tandem C–C/C–O bond formation. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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