1
|
Zuo Y, Zuo P, Liu M, Wang X, Du J, Li X, Zhang P, Xu Z. Recent approaches for the synthesis of heterocycles from amidines via a metal catalyzed C-H functionalization reaction. Org Biomol Chem 2024; 22:5014-5031. [PMID: 38831700 DOI: 10.1039/d4ob00420e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Transition metal catalyzed C-H bond activation has become one of the most important tools for constructing new chemical bonds. Introducing directing groups to the substrates is the key to a successful reaction, these directing groups can also be further transformed in the reaction. Amidines with their unique structure and reactivity are ideal substrates for transition metal-catalyzed C-H transformations. This review describes the major advances and mechanistic investigations of the C-H activation/annulation tandem reactions of amidines until early 2024, focusing on metal-catalyzed C-H activation of amidines with unsaturated compounds, such as alkynes, ketone, vinylene carbonate, cyclopropanols and their derivatives. Meanwhile this manuscript also explores the reaction of amidines with different carbene precursors, for example diazo compounds, azide, triazoles, pyriodotriazoles, and sulfoxonium ylides as well as their own C-H bond activation/cyclization reactions. A bright outlook is provided at the end of the manuscript.
Collapse
Affiliation(s)
- Youpeng Zuo
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| | - Pengfei Zuo
- Kunshan Customs, Kunshan, Jiangsu 215300, People's Republic of China
| | - Meijun Liu
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| | - Xiaoqing Wang
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| | - Jun Du
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| | - Xiaoling Li
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| | - Pinghua Zhang
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| | - Zhenhua Xu
- School of Chemistry and Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, People's Republic of China.
| |
Collapse
|
2
|
Sukhorukov AY. Editorial: Heterodienes in organic synthesis. Front Chem 2024; 12:1403024. [PMID: 38650672 PMCID: PMC11033432 DOI: 10.3389/fchem.2024.1403024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 03/25/2024] [Indexed: 04/25/2024] Open
Affiliation(s)
- Alexey Yu. Sukhorukov
- Laboratory of Organic and Metal-Organic Nitrogen-Oxygen Systems, N. D. Zelinsky Institute of Organic Chemistry, Moscow, Russia
| |
Collapse
|
3
|
Zhao MN, Yang ZM, Li LQ. DMF as an amine source: iron-catalyzed cyclization of 2 H-azirines to imidazoles. Chem Commun (Camb) 2024. [PMID: 38258986 DOI: 10.1039/d3cc06147g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
A novel method has been developed for the synthesis of 1-methyl-4,5-diaryl-1H-imidazoles through Fe(II)-catalyzed cyclization of 2H-azirines and N,N-dimethylformamide (DMF) as an amine source. This transformation involves the cleavage of C-N and CN double bonds and the construction of new C-N and CN double bonds. The reaction has readily available starting materials, a wide range of substrates and mild reaction conditions. In addition, the reaction also facilitated the convenient synthesis of 1-methyl-2,4,5-triaryl-1H-imidazoles.
Collapse
Affiliation(s)
- Mi-Na Zhao
- College of Chemistry and Chemical Engineering, Shaanxi Xueqian Normal University, Xi'an, Shaanxi 710100, P. R. China.
| | - Zi-Mo Yang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Lian-Qing Li
- College of Chemistry and Chemical Engineering, Shaanxi Xueqian Normal University, Xi'an, Shaanxi 710100, P. R. China.
| |
Collapse
|
4
|
Jain A, Kumari A, Metre RK, Rana NK. Diastereoselective synthesis of trans-2,3-dihydroindoles via formal [4 + 1] annulation reactions of a sulfonium ylide. Org Biomol Chem 2024; 22:621-632. [PMID: 38165688 DOI: 10.1039/d3ob01793a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
We have established an in situ generated sulfonium-ylide mediated annulation to construct 2,3-disubstituted-2,3-dihydroindoles. The [4 + 1] annulation approach relied on Michael addition/substitution reactions. These reactions were carried out at ambient temperature to deliver dihydroindoles with excellent yields and diastereoselectivities. Moreover, the versatility of this approach allows for the introduction of various functional groups, enabling further diversification of the dihydroindoles. Also, the cascade approach was broadened to synthesize dihydrobenzofurans.
Collapse
Affiliation(s)
- Anshul Jain
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342030, India.
| | - Akanksha Kumari
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342030, India.
| | - Ramesh K Metre
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342030, India.
| | - Nirmal K Rana
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur-342030, India.
| |
Collapse
|
5
|
Zhou X, Huang Q, Guo J, Dai L, Lu Y. Molecular Editing of Pyrroles via a Skeletal Recasting Strategy. ACS CENTRAL SCIENCE 2023; 9:1758-1767. [PMID: 37780359 PMCID: PMC10540293 DOI: 10.1021/acscentsci.3c00812] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Indexed: 10/03/2023]
Abstract
Heterocyclic scaffolds are commonly found in numerous biologically active molecules, therapeutic agents, and agrochemicals. To probe chemical space around heterocycles, many powerful molecular editing strategies have been devised. Versatile C-H functionalization strategies allow for peripheral modifications of heterocyclic motifs, often being specific and taking place at multiple sites. The past few years have seen the quick emergence of exciting "single-atom skeletal editing" strategies, through one-atom deletion or addition, enabling ring contraction/expansion and structural diversification, as well as scaffold hopping. The construction of heterocycles via deconstruction of simple heterocycles is unknown. Herein, we disclose a new molecular editing method which we name the skeletal recasting strategy. Specifically, by tapping on the 1,3-dipolar property of azoalkenes, we recast simple pyrroles to fully substituted pyrroles, through a simple phosphoric acid-promoted one-pot reaction consisting of dearomative deconstruction and rearomative reconstruction steps. The reaction allows for easy access to synthetically challenging tetra-substituted pyrroles which are otherwise difficult to synthesize. Furthermore, we construct N-N axial chirality on our pyrrole products, as well as accomplish a facile synthesis of the anticancer drug, Sutent. The potential application of this method to other heterocycles has also been demonstrated.
Collapse
Affiliation(s)
- Xueting Zhou
- Joint
School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, Fujian 350207, China
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Qingqin Huang
- Joint
School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, Fujian 350207, China
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jiami Guo
- Joint
School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, Fujian 350207, China
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Lei Dai
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Yixin Lu
- Joint
School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, Fujian 350207, China
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| |
Collapse
|
6
|
Gao X, Han TJ, Li BB, Hou XX, Hua YZ, Jia SK, Xiao X, Wang MC, Wei D, Mei GJ. Catalytic asymmetric dearomatization of phenols via divergent intermolecular (3 + 2) and alkylation reactions. Nat Commun 2023; 14:5189. [PMID: 37626030 PMCID: PMC10457327 DOI: 10.1038/s41467-023-40891-w] [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: 03/25/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
The catalytic asymmetric dearomatization (CADA) reaction has proved to be a powerful protocol for rapid assembly of valuable three-dimensional cyclic compounds from readily available planar aromatics. In contrast to the well-studied indoles and naphthols, phenols have been considered challenging substrates for intermolecular CADA reactions due to the combination of strong aromaticity and potential regioselectivity issue over the multiple nucleophilic sites (O, C2 as well as C4). Reported herein are the chiral phosphoric acid-catalyzed divergent intermolecular CADA reactions of common phenols with azoalkenes, which deliver the tetrahydroindolone and cyclohexadienone products bearing an all-carbon quaternary stereogenic center in good yields with excellent ee values. Notably, simply adjusting the reaction temperature leads to the chemo-divergent intermolecular (3 + 2) and alkylation dearomatization reactions. Moreover, the stereo-divergent synthesis of four possible stereoisomers in a kind has been achieved via changing the sequence of catalyst enantiomers.
Collapse
Affiliation(s)
- Xiang Gao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Tian-Jiao Han
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Bei-Bei Li
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Xiao-Xiao Hou
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Yuan-Zhao Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Shi-Kun Jia
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Xiao Xiao
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Donghui Wei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Guang-Jian Mei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, People's Republic of China.
| |
Collapse
|
7
|
Benzi A, Lopes SMM, Nunes SCC, Giorgi G, Bianchi L, Tavani C, Pais AACC, Petrillo G, Pinho e Melo TMVD. Reactivity of ethyl nitrosoacrylate toward pyrrole, indole and pyrrolo[3,2- c]carbazole: an experimental and theoretical study. Front Chem 2023; 11:1229669. [PMID: 37614704 PMCID: PMC10443595 DOI: 10.3389/fchem.2023.1229669] [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: 05/26/2023] [Accepted: 07/26/2023] [Indexed: 08/25/2023] Open
Abstract
Nitrosoalkenes react with 8-methyl-1,6-dihydropyrrolo[3,2-c]carbazole to give both 2- and 3-alkylated products via hetero-Diels-Alder reaction followed by the cycloadduct ring-opening. Quantum chemical calculations, at DFT level of theory, were carried out to investigate the regioselectivity of the cycloaddition of ethyl nitrosoacrylate with 1,6-dihydropyrrolo[3,2-c]carbazoles as well as with pyrrole and indole, allowing a more comprehensive analysis of the reactivity pattern of nitrosoalkenes with five-membered heterocycles. Furthermore, theoretical calculations confirmed that ethyl nitrosoacrylate reacts with these heterocycles via a LUMOheterodiene-HOMOdienophile controlled cycloaddition. The reactivity of one of the oxime-functionalized 1,6-dihydropyrrolo[3,2-c]carbazole was explored and a new hexahydropyrido[4',3':4,5]pyrrolo[3,2-c]carbazole system was obtained in high yield via a one-pot, two-step procedure.
Collapse
Affiliation(s)
- Alice Benzi
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Susana M. M. Lopes
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Sandra C. C. Nunes
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Gianluca Giorgi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Lara Bianchi
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Cinzia Tavani
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Alberto A. C. C. Pais
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| | - Giovanni Petrillo
- Department of Chemistry and Industrial Chemistry, University of Genova, Genoa, Italy
| | - Teresa M. V. D. Pinho e Melo
- Coimbra Chemistry Centre-Institute of Molecular Sciences, Department of Chemistry, University of Coimbra, Coimbra, Portugal
| |
Collapse
|
8
|
Pospelov EV, Sukhorukov AY. Building Up a Piperazine Ring from a Primary Amino Group via Catalytic Reductive Cyclization of Dioximes. Int J Mol Sci 2023; 24:11794. [PMID: 37511552 PMCID: PMC10380651 DOI: 10.3390/ijms241411794] [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: 07/04/2023] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023] Open
Abstract
Piperazine is one of the most frequently found scaffolds in small-molecule FDA-approved drugs. In this study, a general approach to the synthesis of piperazines bearing substituents at carbon and nitrogen atoms utilizing primary amines and nitrosoalkenes as synthons was developed. The method relies on sequential double Michael addition of nitrosoalkenes to amines to give bis(oximinoalkyl)amines, followed by stereoselective catalytic reductive cyclization of the oxime groups. The method that we developed allows a straightforward structural modification of bioactive molecules (e.g., α-amino acids) by the conversion of a primary amino group into a piperazine ring.
Collapse
Affiliation(s)
- Evgeny V Pospelov
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect, 47, Moscow 119991, Russia
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect, 47, Moscow 119991, Russia
| |
Collapse
|
9
|
Zhao Q, Yu L, Zhang YD, Guo YQ, Chen M, Ren ZH, Guan ZH. C(alkyl)-C(vinyl) bond cleavage enabled by Retro-Pallada-Diels-Alder reaction. Nat Commun 2023; 14:2572. [PMID: 37142571 PMCID: PMC10160084 DOI: 10.1038/s41467-023-38067-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 04/12/2023] [Indexed: 05/06/2023] Open
Abstract
Activation and cleavage of carbon-carbon (C-C) bonds is a fundamental transformation in organic chemistry while inert C-C bonds cleavage remains a long-standing challenge. Retro-Diels-Alder (retro-DA) reaction is a well-known and important tool for C-C bonds cleavage but less been explored in methodology by contrast to other strategies. Herein, we report a selective C(alkyl)-C(vinyl) bond cleavage strategy realized through the transient directing group mediated retro-Diels-Alder reaction of a six-membered palladacycle, which is obtained from an in situ generated hydrazone and palladium hydride species. This unprecedented strategy exhibits good tolerances and thus offers new opportunities for late-stage modifications of complex molecules. DFT calculations revealed that an intriguing retro-Pd(IV)-Diels-Alder process is possibly involved in the catalytic cycle, thus bridging both Retro-Diels-Alder reaction and C-C bond cleavage. We anticipate that this strategy should prove instrumental for potential applications to achieve the modification of functional organic skeletons in synthetic chemistry and other fields involving in molecular editing.
Collapse
Affiliation(s)
- Qingyang Zhao
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China
- School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, P.R. China
| | - Le Yu
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China
| | - Yao-Du Zhang
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China
| | - Yong-Qiang Guo
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China
| | - Ming Chen
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Nature Functional Molecule of the Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi'an, P.R. China.
| |
Collapse
|
10
|
Mo NN, Miao YH, Xiao X, Hua YZ, Wang MC, Huang L, Mei GJ. Catalytic asymmetric de novo construction of 4-pyrrolin-2-ones via intermolecular formal [3+2] cycloaddition of azoalkenes with azlactones. Chem Commun (Camb) 2023; 59:5902-5905. [PMID: 37097750 DOI: 10.1039/d3cc01194a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
The chiral phosphoric acid-catalyzed asymmetric intermolecular formal [3+2] cycloaddition of azoalkenes with azlactones has been established. This convergent protocol leads to a facile and enantioselective de novo construction of a wide range of fully substituted 4-pyrrolin-2-ones bearing a fully substituted carbon atom in good yields and with excellent enantioselectivities (26 examples, 72-95% yields and 87-99% ee).
Collapse
Affiliation(s)
- Nan-Nan Mo
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Yu-Hang Miao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Xiao Xiao
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China
| | - Yuan-Zhao Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Lihua Huang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Guang-Jian Mei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| |
Collapse
|
11
|
Yang FY, Han TJ, Jia SK, Wang MC, Mei GJ. Catalytic [2,3]-sigmatropic rearrangement of sulfonium ylides derived from azoalkenes: non-carbenoid Doyle-Kirmse reaction. Chem Commun (Camb) 2023; 59:3107-3110. [PMID: 36808428 DOI: 10.1039/d3cc00160a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The Sc(III)-catalyzed [2,3]-sigmatropic rearrangement of sulfonium ylides derived from azoalkenes has been established. Owing to the absence of a carbenoid intermediate, this protocol represents the first non-carbenoid variant of the Doyle-Kirmse reaction. Under mild conditions, a variety of tertiary thioethers have been readily prepared in good to excellent yields.
Collapse
Affiliation(s)
- Fu-Yuan Yang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Tian-Jiao Han
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Shi-Kun Jia
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Guang-Jian Mei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| |
Collapse
|
12
|
Vuillermet F, Dahab MA, Abdelhamid D, Polat DE, Gill MA, Beauchemin AM. Synthesis of 1,2,4-Triazinones Exploiting the Reactivity of Diazadiene and N-Isocyanate Intermediates. J Org Chem 2023; 88:2095-2102. [PMID: 36749643 DOI: 10.1021/acs.joc.2c02494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
1,2,4-Triazinones are useful compounds, but their synthesis can be challenging. Herein, we report a strategy to build 1,2,4-triazinones using α-bromohydrazones to access diazadienes and exploiting their ability to undergo facile substitution with nitrogen nucleophiles. The N-isocyanate intermediate formed in situ can then undergo cyclization to give the desired triazinones. This provides access to products with various substituents at the 4-position, and with suitable hydrazone precursors (R2 = Ph), the cascade reaction yields 1,2,4-triazin-3(2H)-ones at room temperature.
Collapse
Affiliation(s)
- Frédéric Vuillermet
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Mohammed A Dahab
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Dalia Abdelhamid
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Dilan E Polat
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Monica A Gill
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - André M Beauchemin
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| |
Collapse
|
13
|
Kokuev AO, Sukhorukov AY. Michael addition of P-nucleophiles to azoalkenes provides simple access to phosphine oxides bearing an alkylhydrazone moiety. Front Chem 2023; 11:1177680. [PMID: 37123875 PMCID: PMC10133514 DOI: 10.3389/fchem.2023.1177680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 03/27/2023] [Indexed: 05/02/2023] Open
Abstract
β-Hydrazonophosphine oxides are precursors of useful organophosphorus compounds, including phosphorylated N-heterocycles, α-aminophosphonates, and vinylphosphonates. In this work, a general transition metal-free synthesis of β-hydrazonophosphine oxides was developed. The method relies on the Michael addition of phosphine oxides R2P(O)H to reactive azoalkenes (1,2-diaza-1,3-butadienes), which are generated in situ from α-halohydrazones and Hunig's base. The reaction stereoselectively leads to Z-isomers of β-hydrazonophosphine oxides that are stabilized by intramolecular hydrogen bonding. The conversion of the products thus obtained into potential chelating ligands was showcased.
Collapse
|
14
|
3-(1,2,3-Triazol-4-yl)-β-Carbolines and 3-(1 H-Tetrazol-5-yl)-β-Carbolines: Synthesis and Evaluation as Anticancer Agents. Pharmaceuticals (Basel) 2022; 15:ph15121510. [PMID: 36558961 PMCID: PMC9785278 DOI: 10.3390/ph15121510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/28/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022] Open
Abstract
Herein, the synthesis and anticancer activity evaluation of a series of novel β-carbolines is reported. The reactivity of nitrosoalkenes towards indole was explored for the synthesis of novel tryptophan analogs where the carboxylic acid was replaced by a triazole moiety. This tryptamine was used in the synthesis of 3-(1,2,3-triazol-4-yl)-β-carbolines via Pictet-Spengler condensation followed by an oxidative step. A library of compounds, including the novel 3-(1,2,3-triazol-4-yl)-β-carbolines as well as methyl β-carboline-3-carboxylate and 3-tetrazolyl-β-carboline derivatives, was evaluated for their antiproliferative activity against colorectal cancer cell lines. The 3-(1H-tetrazol-5-yl)-β-carbolines stood out as the most active compounds, with values of half-maximal inhibitory concentration (IC50) ranging from 3.3 µM to 9.6 µM against colorectal adenocarcinoma HCT116 and HT29 cell lines. The results also revealed a mechanism of action independent of the p53 pathway. Further studies with the 3-tetrazolyl-β-carboline derivative, which showed high selectivity for cancer cells, revealed IC50 values below 8 μM against pancreatic adenocarcinoma PANC-1, melanoma A375, hepatocarcinoma HEPG2, and breast adenocarcinoma MCF-7 cell lines. Collectively, this work discloses the 3-tetrazolyl-β-carboline derivative as a promising anticancer agent worthy of being further explored in future works.
Collapse
|
15
|
Zhang X, Wang H, Li Z, Shu Y, Gan S, Zhang X, Shao H, Wang C. Chemodivergent Synthesis of Aza-Heterocycles with a Quarternary Carbon Center via [4 + 1] Annulation between Azoalkenes and α-Bromo Carbonyl Compounds. ACS OMEGA 2022; 7:40963-40972. [PMID: 36406503 PMCID: PMC9670695 DOI: 10.1021/acsomega.2c04127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
An efficient [4 + 1] annulation reaction between in situ generated azoalkene intermediates and α-bromocarbonyls has been established. A series of skeletally diverse aza-heterocycles with a functionalized quaternary center were obtained in up to 89% yield under mild conditions.
Collapse
Affiliation(s)
- Xiaoke Zhang
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
- Zunyi
Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Haibo Wang
- Zhejiang
Hongyuan Pharmaceutical Co., Ltd., Chem & APIs, Industrial Zone, Linhai, Taizhou 310001, Zhejiang, P.R. China
| | - Ziwei Li
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
| | - Yan Shu
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
| | - Song Gan
- Zunyi
Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Xuefang Zhang
- Zunyi
Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Huawu Shao
- Natural
Products Research Centre, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 100045, P.R. China
| | - Chaoyong Wang
- Central
Laboratory, Chongqing University FuLing
Hospital, Chongqing 408000, P.R. China
| |
Collapse
|
16
|
Wang T, Liu C, Xu D, Xu J, Yang Z. Iridium-Catalyzed and pH-Dependent Reductions of Nitroalkenes to Ketones. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227822. [PMID: 36431923 PMCID: PMC9696932 DOI: 10.3390/molecules27227822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022]
Abstract
A highly chemoselective conversion of α,β-disubstituted nitroalkenes to ketones is developed. An acid-compatible iridium catalyst serves as the key to the conversion. At a 2500 S/C ratio, nitroalkenes were readily converted to ketones in up to 72% isolated yields. A new mechanistic mode involving the reduction of nitroalkene to nitrosoalkene and N-alkenyl hydroxylamine is proposed. This conversion is ready to amplify to a gram-scale synthesis. The pH value plays an indispensable role in controlling the chemoselectivity.
Collapse
|
17
|
Diaza-1,3-butadienes as Useful Intermediate in Heterocycles Synthesis. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196708. [PMID: 36235245 PMCID: PMC9573662 DOI: 10.3390/molecules27196708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 11/05/2022]
Abstract
Many heterocyclic compounds can be synthetized using diaza-1,3-butadienes (DADs) as key structural precursors. Isolated and in situ diaza-1,3-butadienes, produced from their respective precursors (typically imines and hydrazones) under a variety of conditions, can both react with a wide range of substrates in many kinds of reactions. Most of these reactions discussed here include nucleophilic additions, Michael-type reactions, cycloadditions, Diels–Alder, inverse electron demand Diels–Alder, and aza-Diels–Alder reactions. This review focuses on the reports during the last 10 years employing 1,2-diaza-, 1,3-diaza-, 2,3-diaza-, and 1,4-diaza-1,3-butadienes as intermediates to synthesize heterocycles such as indole, pyrazole, 1,2,3-triazole, imidazoline, pyrimidinone, pyrazoline, -lactam, and imidazolidine, among others. Fused heterocycles, such as quinazoline, isoquinoline, and dihydroquinoxaline derivatives, are also included in the review.
Collapse
|
18
|
Han T, Zhang Z, Wang M, Xu L, Mei G. The Rational Design and Atroposelective Synthesis of Axially Chiral C2‐Arylpyrrole‐Derived Amino Alcohols. Angew Chem Int Ed Engl 2022; 61:e202207517. [DOI: 10.1002/anie.202207517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Indexed: 12/15/2022]
Affiliation(s)
- Tian‐Jiao Han
- Green Catalysis Center College of Chemistry Zhengzhou University Zhengzhou 450001 China
| | - Zheng‐Xu Zhang
- School of Chemistry and Chemical Engineering Shandong University of Technology Zibo 255000 Shandong China
| | - Min‐Can Wang
- Green Catalysis Center College of Chemistry Zhengzhou University Zhengzhou 450001 China
| | - Li‐Ping Xu
- School of Chemistry and Chemical Engineering Shandong University of Technology Zibo 255000 Shandong China
| | - Guang‐Jian Mei
- Green Catalysis Center College of Chemistry Zhengzhou University Zhengzhou 450001 China
| |
Collapse
|
19
|
Gao HJ, Miao YH, Jia SK, Li N, Xu LP, Wang W, Wang MC, Mei GJ. Azo group-enabled metal- and oxidant-free alkenyl C–H thiolation: Access to stereodefined tetrasubstituted acyclic olefins. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
20
|
Jiménez-Aberásturi X, Palacios F, de Los Santos JM. Sc(OTf) 3-Mediated [4 + 2] Annulations of N-Carbonyl Aryldiazenes with Cyclopentadiene to Construct Cinnoline Derivatives: Azo-Povarov Reaction. J Org Chem 2022; 87:11583-11592. [PMID: 35972474 PMCID: PMC9447289 DOI: 10.1021/acs.joc.2c01224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We disclose the first accomplishment of the azo-Povarov reaction involving Sc(OTf)3-catalyzed [4 + 2] annulations of N-carbonyl aryldiazenes with cyclopentadiene in chloroform, in which N-carbonyl aryldiazenes act as 4π-electron donors. Hence, this protocol offers a rapid access to an array of cinnoline derivatives in moderate to good yields for substrates over a wide scope. The synthetic potential of the protocol was achieved by the gram-scale reaction and further derivatization of the obtained polycyclic product.
Collapse
Affiliation(s)
- Xabier Jiménez-Aberásturi
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria 01006, Spain
| | - Francisco Palacios
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria 01006, Spain
| | - Jesús M de Los Santos
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, Vitoria 01006, Spain
| |
Collapse
|
21
|
Pospelov E, Boyko Y, Ioffe SL, Sukhorukov A. Synthesis of Bis(β‐oximinoalkyl)malonates and Their Catalytic Reductive Cyclization to Piperidines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Evgeny Pospelov
- N. D. Zelinsky Institute of Organic Chemistry RUSSIAN FEDERATION
| | | | | | | |
Collapse
|
22
|
Han TJ, Zhang ZX, Wang MC, Xu LP, Mei GJ. The Rational Design and Atroposelective Synthesis of Axially Chiral C2‐Arylpyrrole‐Derived Amino Alcohols. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Zheng-Xu Zhang
- Shandong University of Technology College of Chemistry CHINA
| | | | - Li-Ping Xu
- Shandong University of Technology College of Chemistry CHINA
| | - Guang-Jian Mei
- Zhengzhou University Chemistry Zhengzhou 450001 450001 Zhengzhou CHINA
| |
Collapse
|
23
|
Miao YH, Hua YZ, Gao HJ, Mo NN, Wang MC, Mei GJ. Catalytic asymmetric inverse-electron-demand aza-Diels-Alder reaction of 1,3-diazadienes with 3-vinylindoles. Chem Commun (Camb) 2022; 58:7515-7518. [PMID: 35687078 DOI: 10.1039/d2cc02458f] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A facile chiral phosphoric-acid catalyzed asymmetric inverse-electron-demand aza-Diels-Alder reaction of 1,3-diazadienes with 3-vinylindoles was established. By using this mild and practical protocol, a broad range of benzothiazolopyrimidines with three contiguous stereogenic centers were prepared in good yields and excellent diastereo- and enantio-selectivities (43 examples, up to 83% yield, >99% ee and all >20 : 1 dr). A plausible concerted reaction pathway enabled by the dual hydrogen-bonding effect was proposed to account for the observed excellent enantioselectivity and specific trans-trans diastereoselectivity.
Collapse
Affiliation(s)
- Yu-Hang Miao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Yuan-Zhao Hua
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Hao-Jie Gao
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Nan-Nan Mo
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Min-Can Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Guang-Jian Mei
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| |
Collapse
|
24
|
Mantellini F, Mari G, De Crescentini L, Favi G, Mancinelli M, Santeusanio S. Easy access to indole‐based bi‐sulfurylate‐heterocyclic scaffolds. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200299] [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)
- Fabio Mantellini
- Università degli Studi di Urbino "Carlo Bo'" Dipartimento di Scienze Biomolecolari Via I Maggetti 24 61029 Urbino ITALY
| | - Giacomo Mari
- University of Urbino Carlo Bo: Universita degli Studi di Urbino Carlo Bo dipartimento di scienze biomolecolari ITALY
| | - Lucia De Crescentini
- University of Urbino Carlo Bo: Universita degli Studi di Urbino Carlo Bo Dipartimento di Scienze Biomolecolari ITALY
| | - Gianfranco Favi
- University of Urbino Carlo Bo: Universita degli Studi di Urbino Carlo Bo Dipartimento di Scienze Biomolecolari ITALY
| | - Michele Mancinelli
- Alma Mater Studiorum Universita di Bologna: Universita degli Studi di Bologna Department of Industrial Chemistry “Toso Montanari” ITALY
| | - Stefania Santeusanio
- University of Urbino Carlo Bo: Universita degli Studi di Urbino Carlo Bo Dipartimento di Scienze Biomolecolari ITALY
| |
Collapse
|
25
|
Mari G, De Crescentini L, Favi G, Santeusanio S, Mantellini F. A facile protocol for the preparation of 2-carboxylated thieno [2,3- b] indoles: a de novo access to alkaloid thienodolin. Org Biomol Chem 2022; 20:4167-4175. [PMID: 35531860 DOI: 10.1039/d2ob00440b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A metal-free strategy, alternative to the known complex cycloaddition reactions, towards 2-carboxylated thieno [2,3-b] indole derivatives has been successfully developed. The novel approach involves as starting materials easy accessible 1,2-diaza-1,3-dienes and indoline 2-thione and requires mild reaction conditions. Furthermore, the easy work-up required makes this method amenable for a one-pot approach as demonstrated in the preparation of thienodolin, a natural product isolated from Streptomyces albogriseolus that exhibits valuable biological properties.
Collapse
Affiliation(s)
- Giacomo Mari
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, PU, Italy.
| | - Lucia De Crescentini
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, PU, Italy.
| | - Gianfranco Favi
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, PU, Italy.
| | - Stefania Santeusanio
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, PU, Italy.
| | - Fabio Mantellini
- Department of Biomolecular Sciences, Section of Chemistry and Pharmaceutical Technologies, University of Urbino "Carlo Bo", Via I Maggetti 24, 61029 Urbino, PU, Italy.
| |
Collapse
|
26
|
Lukoyanov AA, Tabolin AA, Nelyubina YV, Ioffe SL, Sukhorukov AY. Deoxygenative Arylation of 5,6-Dihydro-4 H-1,2-oxazine- N-oxides with Arynes. J Org Chem 2022; 87:6838-6851. [PMID: 35523000 DOI: 10.1021/acs.joc.2c00515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Six-membered cyclic nitronates (5,6-dihydro-4H-1,2-oxazine-N-oxides) react with Kobayashi's aryne precursors producing 3-(2-hydroxyaryl)-substituted 1,2-oxazines via deoxygenative C-H arylation. The process involves a hitherto unknown 1,3-dipolar cycloaddition of nitronate to the aryne to give an unusual tricyclic nitroso acetal, in which the N-O bond of the isoxazoline ring is selectively cleaved upon the action of a base (CsF) or an acid (TFA). The transient cycloadducts were isolated and characterized in some cases. The synthetic potential of the obtained 3-(2-hydroxyaryl)-substituted 1,2-oxazines was demonstrated by their stereoselective reduction to 1,4-amino alcohols and reductive 1,2-oxazine ring contraction to tetrahydrofuran derivatives.
Collapse
Affiliation(s)
- Alexander A Lukoyanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilov strasse 28, Moscow 119991, Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| |
Collapse
|
27
|
Diastereodivergent formal [4 + 1] cycloaddition of azoalkenes as one-carbon synthons. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
|
28
|
[4 + 1] Annulation of in situ generated azoalkenes with amines: A powerful approach to access 1-substituted 1,2,3-triazoles. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
29
|
Diels-Alder Cycloaddition Reactions in Sustainable Media. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27041304. [PMID: 35209094 PMCID: PMC8876200 DOI: 10.3390/molecules27041304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/11/2022] [Accepted: 02/13/2022] [Indexed: 11/17/2022]
Abstract
Diels–Alder cycloaddition reaction is one of the most powerful strategies for the construction of six-membered carbocyclic and heterocyclic systems, in most cases with high regio- and stereoselectivity. In this review, an insight into the most relevant advances on sustainable Diels–Alder reactions since 2010 is provided. Various environmentally benign solvent systems are discussed, namely bio-based derived solvents (such as glycerol and gluconic acid), polyethylene glycol, deep eutectic solvents, supercritical carbon dioxide, water and water-based aqueous systems. Issues such as method’s scope, efficiency, selectivity and reaction mechanism, as well as sustainability, advantages and limitations of these reaction media, are addressed.
Collapse
|
30
|
Ethyl 7-Acetyl-8a-methyl-3-(1-phenyl-1H-tetrazol-5-yl)-1,4,4a,5,6,8a-hexahydro-7H-pyrano[2,3-c]pyridazine-1-carboxylate. MOLBANK 2022. [DOI: 10.3390/m1338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The Diels–Alder reaction of ethyl 3-(1-phenyl-1H-tetrazol-5-yl-1,2-diaza-1,3-butadiene-1-carboxylate with 2-acetyl-6-methyl-2,3-dihydro-4H-pyran (methyl vinyl ketone dimer) regioselectively afforded the corresponding 3-(tetrazol-5-yl)-hexahydro-7H-pyrano[2,3-c]pyridazine in quantitative yield. An X-ray crystal structure of this cycloadduct is reported.
Collapse
|
31
|
Shen LW, Wang ZH, You Y, Zhao JQ, Zhou MQ, Yuan WC. α-Nitrosostyrenes as Three-Atom Units for the (3+1) Cyclization Reaction: Facile Access to 2,3-Dihydrodiazete N-Oxides and Their Diversified Synthetic Conversions. Org Lett 2022; 24:1094-1099. [PMID: 35077186 DOI: 10.1021/acs.orglett.2c00024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An unprecedented (3+1) cyclization of α-nitrosostyrenes, generated in situ from α-bromooximes, and N-tosyloxycarbamates was developed, which enables the synthesis of a range of structurally unique and hitherto unexplored 2,3-dihydrodiazete N-oxides in moderate to high yields. The products possess a highly strained four-membered ring structure containing two nitrogen atoms. The synthetic applicability of the products was also demonstrated by many important conversions to diverse nitrogen-containing compounds.
Collapse
Affiliation(s)
- Li-Wen Shen
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China.,National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen-Hua Wang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Yong You
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Jian-Qiang Zhao
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Ming-Qiang Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei-Cheng Yuan
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| |
Collapse
|
32
|
Chatterjee A, Radhakrishnan D, Bandyopadhyay D, Kanchithalaivan S, Peruncheralathan S. Metal‐free ring opening of 5‐amino‐1,
4‐diaryl‐1
H
‐pyrazoles: A facile access to 2‐aryl‐3‐arylazoacrylonitriles. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Arpita Chatterjee
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Bhubaneswar India
| | - Divya Radhakrishnan
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Bhubaneswar India
| | - Debashruti Bandyopadhyay
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Bhubaneswar India
| | - Selvaraj Kanchithalaivan
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Bhubaneswar India
| | - Saravanan Peruncheralathan
- School of Chemical Sciences National Institute of Science Education and Research (NISER) Bhubaneswar India
| |
Collapse
|
33
|
Chen C, Ding J, Liu L, Huang Y, Zhu B. Palladium‐Catalyzed Domino Cyclization/Phosphorylation of
gem
‐Dibromoolefins with P(O)H Compounds: Synthesis of Phosphorylated Heteroaromatics. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202100949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chen Chen
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of Chemistry Tianjin Normal University Tianjin 300387, People's Republic of China
| | - Jie Ding
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of Chemistry Tianjin Normal University Tianjin 300387, People's Republic of China
| | - Liying Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of Chemistry Tianjin Normal University Tianjin 300387, People's Republic of China
| | - Yujie Huang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of Chemistry Tianjin Normal University Tianjin 300387, People's Republic of China
| | - Bolin Zhu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of Chemistry Tianjin Normal University Tianjin 300387, People's Republic of China
| |
Collapse
|
34
|
Aza-Diels-Alder reaction of both electron-deficient azoalkenes with electron-deficient 3-phencaylideneoxindoles and 3-aryliminooxindol-2-ones. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
|
35
|
Crescentini LD, Favi G, Mari G, Ciancaleoni G, Costamagna M, Santeusanio S, Mantellini F. Experimental and Theoretical DFT Investigations in the [2,3]-Wittig-Type Rearrangement of Propargyl/Allyl-Oxy-Pyrazolones. Molecules 2021; 26:6557. [PMID: 34770965 PMCID: PMC8587800 DOI: 10.3390/molecules26216557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/21/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Here we report the synthesis of interesting 3-alkyl-4-hydroxy-1-aryl-4-(propa-1,2-dienyl)1H-pyrazol-5(4H)-ones and 9-alkyl-7-aryl-1-oxa-7,8-diazaspiro[4.4]nona-3,8-dien-6-ones, starting from 1,2-diaza-1,3-dienes (DDs) and propargyl alcohol. The reaction proceeds through a sequence Michael-type nucleophilic attack/cyclization/[2,3]-Wittig rearrangement. In the same way, the reaction between the aforementioned DDs and allyl alcohol furnished 4-allyl-4-hydroxy-3-alkyl-1-aryl-1H-pyrazol-5(4H)-ones. A DFT study was also carried out, in order to have decisive clarifications about the mechanism.
Collapse
Affiliation(s)
- Lucia De Crescentini
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Gianfranco Favi
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Giacomo Mari
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Gianluca Ciancaleoni
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, PI, Italy; (G.C.); (M.C.)
| | - Marcello Costamagna
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, PI, Italy; (G.C.); (M.C.)
| | - Stefania Santeusanio
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Fabio Mantellini
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| |
Collapse
|
36
|
Mari G, Corrieri M, De Crescentini L, Favi G, Santeusanio S, Mantellini F. FeCl
3
‐Catalyzed Formal [3+2] Cyclodimerization of 4‐Carbonyl‐1,2‐diaza‐1,3‐dienes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Giacomo Mari
- Department of Biomolecular Sciences Section of Chemistry and Pharmaceutical Technologies University of Urbino “Carlo Bo” Via I Maggetti 24 61029 Urbino (PU) Italy
| | - Matteo Corrieri
- Department of Biomolecular Sciences Section of Chemistry and Pharmaceutical Technologies University of Urbino “Carlo Bo” Via I Maggetti 24 61029 Urbino (PU) Italy
| | - Lucia De Crescentini
- Department of Biomolecular Sciences Section of Chemistry and Pharmaceutical Technologies University of Urbino “Carlo Bo” Via I Maggetti 24 61029 Urbino (PU) Italy
| | - Gianfranco Favi
- Department of Biomolecular Sciences Section of Chemistry and Pharmaceutical Technologies University of Urbino “Carlo Bo” Via I Maggetti 24 61029 Urbino (PU) Italy
| | - Stefania Santeusanio
- Department of Biomolecular Sciences Section of Chemistry and Pharmaceutical Technologies University of Urbino “Carlo Bo” Via I Maggetti 24 61029 Urbino (PU) Italy
| | - Fabio Mantellini
- Department of Biomolecular Sciences Section of Chemistry and Pharmaceutical Technologies University of Urbino “Carlo Bo” Via I Maggetti 24 61029 Urbino (PU) Italy
| |
Collapse
|
37
|
Addition of malonic esters to azoalkenes generated in situ from α-bromo- and α-chlorohydrazones. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
38
|
Akhmirov RT, Ioffe SL, Yu. Sukhorukov A. Stereoselective approach to conjugated enone oximes from aliphatic nitro compounds and sulfur ylides. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.09.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
39
|
Kumar A, Katiyar S, Kumar Jaiswal A, Kant R, Sashidhara KV. PIDA-mediated oxidative aromatic C N bond cleavage: Efficient methodology for the synthesis of 1,2-diaza-1,3-dienes under ambient conditions. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153252] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
40
|
Wang C, Fang L, Wang Z. Base-induced inverse-electron-demand aza-Diels-Alder reaction of azoalkenes and 1,3,5-triazinanes: Facile approaches to tetrahydro-1,2,4-triazines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
41
|
Chen KW, Wang DD, Liu SJ, Wang X, Zhang YC, Tian YM, Wu Q, Shi F. Application of 3-Alkyl-2-vinylindoles in Catalytic Asymmetric Dearomative (2+3) Cycloadditions. J Org Chem 2021; 86:10427-10439. [PMID: 34313431 DOI: 10.1021/acs.joc.1c01105] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first application of 3-alkyl-2-vinylindoles in catalytic asymmetric dearomative cycloadditions was established by chiral phosphoric acid (CPA)-catalyzed (2+3) cycloaddition with azoalkenes, leading to the generation of chiral pyrroloindolines bearing two tetrasubstituted stereogenic centers in good yields (61-96%) and excellent stereoselectivities (all >95:5 dr, 86-99% ee). This reaction has realized the first enantioselective dearomative cycloaddition of 3-alkyl-2-vinylindoles, which brings a new reactivity to this class of vinylindoles and will enrich the chemistry of 3-alkyl-2-vinylindoles. In addition, this approach has provided a useful strategy for the construction of enantioenriched pyrroloindoline skeletons bearing two tetrasubstituted stereogenic centers. More importantly, the bioassay of these chiral pyrroloindolines has revealed that some compounds exhibit strong anti-cancer activity against Hela and MCF-7 cell lines, which will be helpful for discovering anti-cancer drug candidates.
Collapse
Affiliation(s)
- Ke-Wei Chen
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
| | - Dan-Dan Wang
- Department of Cardiovascular Medicine, Department of Geriatric, Xuzhou First People's Hospital, Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou, 221116, China
| | - Si-Jia Liu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
| | - Xue Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
| | - Yu-Chen Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
| | - Yi-Ming Tian
- Department of Cardiovascular Medicine, Department of Geriatric, Xuzhou First People's Hospital, Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou, 221116, China
| | - Qiong Wu
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou 221018, China
| | - Feng Shi
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, China
| |
Collapse
|
42
|
Zheng B, Li X, Song Y, Meng S, Li Y, Liu Q, Pan L. Visible-Light-Induced Formation of Thiavinyl 1,3-Dipoles: A Metal-Free [3+2] Oxidative Cyclization with Alkynes as Easy Access to Thiophenes. Org Lett 2021; 23:3453-3459. [PMID: 33881879 DOI: 10.1021/acs.orglett.1c00915] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A visible-light-induced [3+2] oxidative cyclization of various alkynes with easily available ketene dithioacetals as the previously unknown thiavinyl 1,3-dipoles in the presence of an acridine photosensitizer is reported. A series of multisubstituted thiophenes were achieved regioselectively in ≤98% yields under very mild metal-free conditions without other additives. This reaction could tolerate a wide range of substrates and achieve good efficiency in large-scale syntheses. The reaction mechanism and their applications are described in detail to reveal the reactivity of the new 1,3-dipoles and the selectivity of the reactions.
Collapse
Affiliation(s)
- Baihui Zheng
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Xiaotong Li
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yang Song
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Shuyang Meng
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yifei Li
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Qun Liu
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Ling Pan
- Jilin Province Key Laboratory of Organic Functional Molecular, Design & Synthesis, Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| |
Collapse
|
43
|
Mlostoń G, Urbaniak K, Sobiecka M, Heimgartner H, Würthwein EU, Zimmer R, Lentz D, Reissig HU. Hetero-Diels-Alder Reactions of In Situ-Generated Azoalkenes with Thioketones; Experimental and Theoretical Studies. Molecules 2021; 26:2544. [PMID: 33925483 PMCID: PMC8123831 DOI: 10.3390/molecules26092544] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 11/18/2022] Open
Abstract
The hetero-Diels-Alder reactions of in situ-generated azoalkenes with thioketones were shown to offer a straightforward method for an efficient and regioselective synthesis of scarcely known N-substituted 1,3,4-thiadiazine derivatives. The scope of the method was fairly broad, allowing the use of a series of aryl-, ferrocenyl-, and alkyl-substituted thioketones. However, in the case of N-tosyl-substituted cycloadducts derived from 1-thioxo-2,2,4,4-tetramethylcyclobutan-3-one and the structurally analogous 1,3-dithione, a more complicated pathway was observed. By elimination of toluene sulfinic acid, the initially formed cycloadducts afforded 2H-1,3,4-thiadiazines as final products. Advanced DFT calculations revealed that the observed high regioselectivity was due to kinetic reaction control and that the (4 + 2)-cycloadditions of sterically less unhindered thiones occurred via highly unsymmetric transition states with shorter C..S-distances (2.27-2.58 Å) and longer N..C-distances (3.02-3.57 Å). In the extreme case of the sterically very hindered 2,2,4,4-tetramethylcyclobutan-1,3-dione-derived thioketones, a zwitterionic intermediate with a fully formed C‒S bond was detected, which underwent ring closure to the 1,3,4-thiadiazine derivative in a second step. For the hypothetical formation of the regioisomeric 1,2,3-thiadiazine derivatives, the DFT calculations proposed more symmetric transition states with considerably higher energies.
Collapse
Affiliation(s)
- Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, 12 Tamka Street, 91-403 Lodz, Poland; (K.U.); (M.S.)
| | - Katarzyna Urbaniak
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, 12 Tamka Street, 91-403 Lodz, Poland; (K.U.); (M.S.)
| | - Malwina Sobiecka
- Department of Organic and Applied Chemistry, Faculty of Chemistry, University of Lodz, 12 Tamka Street, 91-403 Lodz, Poland; (K.U.); (M.S.)
| | - Heinz Heimgartner
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland;
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches Institut and Center for Multiscale Theory and Computation (CMTC), Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Reinhold Zimmer
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany; (R.Z.); (D.L.)
| | - Dieter Lentz
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany; (R.Z.); (D.L.)
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany; (R.Z.); (D.L.)
| |
Collapse
|
44
|
Tsipis CA, Bakalbassis EG, Zisopoulou SA, Gallos JK. Probing the anomeric effect and mechanism of isomerization of oxazinane rings by DFT methods. Org Biomol Chem 2021; 19:1066-1082. [PMID: 33427840 DOI: 10.1039/d0ob02453h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mechanistic studies of the thermal amine-promoted isomerization of oxazinane rings by DFT methods showed that the isomerization proceeds through abstraction of the C-3 hydrogen atom by the amine nitrogen atom followed by its re-recruitment from C-3 that helps the oxazinane ring to avoid breaking, leading to the same or an isomeric conformer. Calculations also provided evidence that steric effects are responsible for the breaking of the O-N bond in the transition state of the thermal amine-promoted transformations of oxazinane rings, leading to the transformation of the 6-membered ring to a 5-membered ring. Extensive computational studies of the origin of the anomeric effect in the di-substituted oxazinane rings, bearing the EtO substituent at C-6 and CO2Et at C-3, and a series of analogous tetrahydro-2H-pyran ring conformers, revealed that the conformational preferences in both series of compounds are tuned by the balance of non-covalent (weak vDW, dipole-dipole, electrostatic forces, hydrogen bonding) steric effects and hyperconjugative interactions.
Collapse
Affiliation(s)
- Constantinos A Tsipis
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Evangelos G Bakalbassis
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Stavroula A Zisopoulou
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - John K Gallos
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| |
Collapse
|
45
|
Wei BY, Xie DT, Lai SQ, Jiang Y, Fu H, Wei D, Han B. Electrochemically Tuned Oxidative [4+2] Annulation and Dioxygenation of Olefins with Hydroxamic Acids. Angew Chem Int Ed Engl 2021; 60:3182-3188. [PMID: 33058402 DOI: 10.1002/anie.202012209] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Indexed: 12/23/2022]
Abstract
This work represents the first [4+2] annulation of hydroxamic acids with olefins for the synthesis of benzo[c][1,2]oxazines scaffold via anode-selective electrochemical oxidation. This protocol features mild conditions, is oxidant free, shows high regioselectivity and stereoselectivity, broad substrate scope of both alkenes and hydroxamic acids, and is compatible with terpenes, peptides, and steroids. Significantly, the dioxygenation of olefins employing hydroxamic acid is also successfully achieved by switching the anode material under the same reaction conditions. The study not only reveals a new reactivity of hydroxamic acids and its first application in electrosynthesis but also provides a successful example of anode material-tuned product selectivity.
Collapse
Affiliation(s)
- Bang-Yi Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Dong-Tai Xie
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Sheng-Qiang Lai
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yu Jiang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Hong Fu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Dian Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| |
Collapse
|
46
|
Mild synthesis of isoxazoline derivatives via an efficient [4 + 1] annulation reaction of transient nitrosoalkenes and sulfur ylides. Sci Rep 2021; 11:2078. [PMID: 33483530 PMCID: PMC7822858 DOI: 10.1038/s41598-021-81370-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 01/06/2021] [Indexed: 12/18/2022] Open
Abstract
An efficient [4 + 1] annulation between α-bromooximes and sulfur ylides via in situ generation of nitrosoalkenes under mild basic reaction conditions has been developed, providing an expeditious and scalable approach to synthesize biologically interesting isoxazoline derivatives with good to excellent yields.
Collapse
|
47
|
Xiang M, Li CY, Zhang J, Zou Y, Li WS, Tian F, Wan WJ, Wang LX. Organocatalytic enantioselective Diels–Alder reaction between hydroxymaleimides and in situ generated nitrosoalkenes for direct preparation of chiral hemiketals with 1,2-oxazine skeleton. Org Chem Front 2021. [DOI: 10.1039/d1qo01022k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organocatalytic Enantioselective IEDDA reaction between hydroxymaleimides and in situ generated nitrosoalkenes has been disclosed, a series of chiral hemiketals containing 5,6-dihydro-4H-l,2-oxazines and succinimide frameworks have been prepared.
Collapse
Affiliation(s)
- Min Xiang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chen-Yi Li
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Zhang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Zou
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wen-Sheng Li
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fang Tian
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Wen-Juan Wan
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Li-Xin Wang
- Key Laboratory of Asymmetric Synthesis and Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| |
Collapse
|
48
|
Chen T, Che C, Guo Z, Dong XQ, Wang CJ. Diastereoselective synthesis of functionalized tetrahydropyridazines containing indole scaffolds via an inverse-electron-demand aza-Diels–Alder reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo00623a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A base-promoted and catalyst-free unprecedented inverse-electron-demand aza-Diels–Alder reaction between the in situ generated azoalkenes and 3-vinylindoles has been developed to afford tetrahydropyridazines containing indole scaffolds.
Collapse
Affiliation(s)
- Taotao Chen
- Engineering Research Centre of Organosilicon Compounds & Materials
- Ministry of Education
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
| | - Chao Che
- Engineering Research Centre of Organosilicon Compounds & Materials
- Ministry of Education
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
| | - Zhefei Guo
- Engineering Research Centre of Organosilicon Compounds & Materials
- Ministry of Education
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
| | - Xiu-Qin Dong
- Engineering Research Centre of Organosilicon Compounds & Materials
- Ministry of Education
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
| | - Chun-Jiang Wang
- Engineering Research Centre of Organosilicon Compounds & Materials
- Ministry of Education
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
| |
Collapse
|
49
|
Liu X, Wang C, Wang X, Ma Z, Meng L, Ding D, Liu J, Chen Y. Synthesis of Spirobarbiturate Piperidin-2-one Derivatives via Cascade Aza-Michael/Michael Cyclization Reaction. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202105045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
50
|
Mei GJ, Koay WL, Tan CXA, Lu Y. Catalytic asymmetric preparation of pyrroloindolines: strategies and applications to total synthesis. Chem Soc Rev 2021; 50:5985-6012. [DOI: 10.1039/d0cs00530d] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pyrroloindolines are widely present in natural products. In this review, we summarize state-of-the-art of catalytic asymmetric synthesis of pyrroloindolines, as well as related applications to natural products total synthesis.
Collapse
Affiliation(s)
- Guang-Jian Mei
- Green Catalysis Center, and College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
- Department of Chemistry
| | - Wai Lean Koay
- Department of Chemistry
- National University of Singapore
- Singapore
- Graduate School for Integrative Sciences & Engineering (NGS)
- National University of Singapore
| | - Chuan Xiang Alvin Tan
- Department of Chemistry
- National University of Singapore
- Singapore
- Graduate School for Integrative Sciences & Engineering (NGS)
- National University of Singapore
| | - Yixin Lu
- Department of Chemistry
- National University of Singapore
- Singapore
- Graduate School for Integrative Sciences & Engineering (NGS)
- National University of Singapore
| |
Collapse
|