1
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Li B, Hu J, Liao M, Xiong Q, Zhang Y, Chi YR, Zhang X, Wu X. Catalyst Control over S(IV)-stereogenicity via Carbene-derived Sulfinyl Azolium Intermediates. J Am Chem Soc 2024; 146:25350-25360. [PMID: 39219070 DOI: 10.1021/jacs.4c10486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Stereoselective synthesis utilizing small-molecule catalysts, particularly N-heterocyclic carbene (NHC), has facilitated swift access to enantioenriched molecules through diverse activation modes and NHC-bound reactive intermediates. While carbonyl derivatives, imines, and "activated" alkenes have been extensively investigated, the exploration of heteroatom-centered analogues of NHC-bound intermediates has long been neglected, despite the significant potential for novel chemical transformations they offer once recognized. Herein, we disclose a carbene-catalyzed new activation mode by generating unique sulfinyl azolium intermediates from carbene nucleophilic addition to in situ-generated mixed sulfinic anhydride intermediates. Combined experimental and computational mechanistic investigations pinpoint the chiral NHC-catalyzed formation of sulfinyl azolium intermediate as the enantio-determining step. The novel "S"-based carbene reactive intermediate imparts high efficiency for the catalytic construction of sulfur-stereogenic compounds, giving rise to sulfinate esters with high yields and enantioselectivities under mild conditions. Notably, distinct from most of the NHC-catalyzed enantioselective transformations focusing on the "C" central chiral products, our study realizes a unique carbene-catalyst control over chiral "S" stereocenters via direct asymmetric S-O bond formation for the first time. Furthermore, these sulfinyl-containing products could serve as versatile synthetic platforms for enantioenriched S-stereogenic functional molecules and exhibit remarkable antibacterial activities against rice plant pathogens, which is valuable for the development of novel agrochemical agents.
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Affiliation(s)
- Benpeng Li
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
- School of Life and Health Science, Kaili University, Kaili 556011, China
| | - Junyuan Hu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Minghong Liao
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Qin Xiong
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Yaqi Zhang
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Yonggui Robin Chi
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Xinglong Zhang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Institute of High Performance Computing, Agency for Science, Technology and Research (A*STAR), 1 Fusionopolis Way, #16-16, Connexis, Singapore 138632, Singapore
| | - Xingxing Wu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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2
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Luo Z, Liao M, Li W, Zhao S, Tang K, Zheng P, Chi YR, Zhang X, Wu X. Ionic Hydrogen Bond-Assisted Catalytic Construction of Nitrogen Stereogenic Center via Formal Desymmetrization of Remote Diols. Angew Chem Int Ed Engl 2024; 63:e202404979. [PMID: 38745374 DOI: 10.1002/anie.202404979] [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: 03/13/2024] [Revised: 04/23/2024] [Accepted: 05/14/2024] [Indexed: 05/16/2024]
Abstract
The control of noncarbon stereogenic centers is of profound importance owing to their enormous interest in bioactive compounds and chiral catalyst or ligand design for enantioselective synthesis. Despite various elegant approaches have been achieved for construction of S-, P-, Si- and B-stereocenters over the past decades, the catalyst-controlled strategies to govern the formation of N-stereogenic compounds have garnered less attention. Here, we disclose the first organocatalytic approach for efficient access to a wide range of nitrogen-stereogenic compounds through a desymmetrization approach. Intriguingly, the pro-chiral remote diols, which are previously not well addressed with enantiocontrol, are well differentiated by potent chiral carbene-bound acyl azolium intermediates. Preliminary studies shed insights on the critical importance of the ionic hydrogen bond (IHB) formed between the dimer aggregate of diols to afford the chiral N-oxide products that feature a tetrahedral nitrogen as the sole stereogenic element with good yields and excellent enantioselectivities. Notably, the chiral N-oxide products could offer an attractive strategy for chiral ligand design and discovery of potential antibacterial agrochemicals.
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Grants
- National Natural Science Fund for Excellent Young Scientists Fund Program (Overseas)-YQHW
- the starting grant of Guizhou University [(2022)47)]
- National Natural Science Foundation of China (21732002, 22061007, 22071036, and 22207022)
- Frontiers Science Center for Asymmetric Synthesis and Medicinal Molecules
- Department of Education, Science and Technology Department of Guizhou Province [Qiankehe-jichu-ZK[2022]zhongdian024]
- Program of Introducing Talents of Discipline to Universities of China (111 Program, D20023) at Guizhou University
- Singapore National Research Foundation under its NRF Investigatorship (NRF-NRFI2016-06) and Competitive Research Program (NRF-CRP22-2019-0002)
- Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award (RG7/20, RG70/21), MOE AcRF Tier 2 (MOE2019-T2-2-117)
- a Chair Professorship Grant, and Nanyang Technological University
- (2022)47 starting grant of Guizhou University
- 21732002 National Natural Science Foundation of China
- 22061007 National Natural Science Foundation of China
- 22071036 National Natural Science Foundation of China
- 22207022 National Natural Science Foundation of China
- Qiankehe-jichu-ZK[2022]zhongdian024 Department of Education, Science and Technology Department of Guizhou Province
- Qiankehejichu-ZK[2024]yiban030 Department of Education, Science and Technology Department of Guizhou Province
- NRF-NRFI2016-06 Singapore National Research Foundation under its NRF Investigatorship and Competitive Research Program
- NRF-CRP22-2019-0002 Singapore National Research Foundation under its NRF Investigatorship and Competitive Research Program
- RG7/20, RG70/21 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2
- MOE2019-T2-2-117 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2
- Chair Professorship Grant, and Nanyang Technological University
- C210812008 Agency for Science, Technology and Research (A*STAR) under its Career Development Fund
- M22K3c0091 Manufacturing, TradeConnectivity (MTC) Young Individual Research Grants.
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Affiliation(s)
- Zhongfu Luo
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Minghong Liao
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Wei Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Sha Zhao
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Kun Tang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Pengcheng Zheng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore
| | - Xinglong Zhang
- Institute of High Performance Computing (IHPC), A*STAR, Singapore, 138632, Singapore
| | - Xingxing Wu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
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3
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Barik S, Sankar G, Biju AT. Enantioselective synthesis of tricyclic oxoquinolines via NHC-catalyzed Michael-aldol-lactamization-dehydration cascade. Chem Commun (Camb) 2024; 60:4290-4293. [PMID: 38445724 DOI: 10.1039/d4cc00502c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
The enantioselective synthesis of tricyclic oxoquinolines via NHC-catalyzed cascade reaction of enals with malonates bearing a 2-aminophenyl group is reported. The chiral α,β-unsaturated acylazoliums underwent a smooth Michael-aldol-lactamization-dehydration quadruple cascade with the amino malonate derivative to afford the desired tricyclic products.
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Affiliation(s)
- Shilpa Barik
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Ganga Sankar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
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4
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De Risi C, Brandolese A, Di Carmine G, Ragno D, Massi A, Bortolini O. Oxidative N-Heterocyclic Carbene Catalysis. Chemistry 2023; 29:e202202467. [PMID: 36205918 PMCID: PMC10099058 DOI: 10.1002/chem.202202467] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Indexed: 11/05/2022]
Abstract
N-Heterocyclic carbene (NHC) catalysis is a by now consolidated organocatalytic platform for a number of synthetic (asymmetric) transformations via diverse reaction modes/intermediates. In addition to the typical umpolung processes involving acyl anion/homoenolate equivalent species, implementation of protocols under oxidative conditions greatly expands the possibilities of this methodology. Oxidative NHC-catalysis allows for oxidative and oxygenative transformations through specific manipulations of Breslow-type species depending upon the oxidant used (external oxidant or O2 /air), the derived NHC-bound intermediates paving the way to non-umpolung processes through activation of carbon atoms and heteroatoms. This review is intended to update the state of the art in oxidative NHC-catalyzed reactions that appeared in the literature from 2014 to present, with a strong focus to crucial intermediates and their mechanistic implications.
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Affiliation(s)
- Carmela De Risi
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Arianna Brandolese
- Dipartimento di Scienze dell'Ambiente e della PrevenzioneUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Graziano Di Carmine
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Daniele Ragno
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche, Farmaceutiche ed AgrarieUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
| | - Olga Bortolini
- Dipartimento di Scienze dell'Ambiente e della PrevenzioneUniversità di FerraraVia L. Borsari, 4644121FerraraItaly
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5
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Singha K, Habib I, Hossain M. Quinoline N‐Oxide: A Versatile Precursor in Organic Transformations. ChemistrySelect 2022. [DOI: 10.1002/slct.202203537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Koustav Singha
- Synthetic Organic Research Laboratory UGC-Human Resource Development Centre (Chemistry) University of North Bengal Siliguri Darjeeling 734013 India
| | - Imran Habib
- Synthetic Organic Research Laboratory UGC-Human Resource Development Centre (Chemistry) University of North Bengal Siliguri Darjeeling 734013 India
| | - Mossaraf Hossain
- Synthetic Organic Research Laboratory UGC-Human Resource Development Centre (Chemistry) University of North Bengal Siliguri Darjeeling 734013 India
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6
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Balanna K, Barik S, Shee S, Gonnade RG, Biju AT. Dynamic kinetic resolution of γ,γ-disubstituted indole 2-carboxaldehydes via NHC-Lewis acid cooperative catalysis for the synthesis of tetracyclic ε-lactones. Chem Sci 2022; 13:11513-11518. [PMID: 36320396 PMCID: PMC9555563 DOI: 10.1039/d2sc03745a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/27/2022] [Indexed: 09/06/2024] Open
Abstract
The ubiquity of ε-lactones in various biologically active compounds inspired the development of efficient and enantioselective routes to these target compounds. Described herein is the enantioselective synthesis of indole-fused ε-lactones by the N-heterocyclic carbene (NHC)-Lewis acid cooperative catalyzed dynamic kinetic resolution (DKR) of in situ generated γ,γ-disubstituted indole 2-carboxaldehydes. The Bi(OTf)3-catalyzed Friedel-Crafts reaction of indole-2-carboxaldehyde with 2-hydroxy phenyl p-quinone methides generates γ,γ-disubstituted indole 2-carboxaldehydes, which in the presence of NHC and Bi(OTf)3 afforded the desired tetracyclic ε-lactones in up to 93% yield and >99 : 1 er. Moreover, preliminary studies on the mechanism of this formal [4 + 3] annulation are also provided.
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Affiliation(s)
- Kuruva Balanna
- Department of Organic Chemistry, Indian Institute of Science Bangalore-560012 India https://orgchem.iisc.ac.in/atbiju/
| | - Soumen Barik
- Department of Organic Chemistry, Indian Institute of Science Bangalore-560012 India https://orgchem.iisc.ac.in/atbiju/
| | - Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science Bangalore-560012 India https://orgchem.iisc.ac.in/atbiju/
| | - Rajesh G Gonnade
- Centre for Materials Characterization, CSIR-National Chemical Laboratory Dr Homi Bhabha Road Pune-411008 India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science Bangalore-560012 India https://orgchem.iisc.ac.in/atbiju/
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7
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Wang H, Chi YR, Huang X. Enantioselective Dual Catalysis of N‐Heterocyclic Carbene and Hydrogen‐Bond Donor Organocatalysts. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hongling Wang
- Shenzhen University College of Chemistry and Environmental Engineering International Joint Research Center for Molecular Science CHINA
| | - Yonggui Robin Chi
- Nanyang Technological University Division of Chemistry & Biological Chemistry 21 Nanyang Link 637371 Singapore SINGAPORE
| | - Xuan Huang
- Shenzhen University College of Chemistry and Environmental Engineering International Joint Research Center for Molecular Science CHINA
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8
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Maiti R, Yan J, Yang X, Mondal B, Xu J, Chai H, Jin Z, Chi YR. Carbene‐Catalyzed Enantioselective Hydrophosphination of α‐Bromoenals to Prepare Phosphine‐Containing Chiral Molecules. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rakesh Maiti
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jia‐Lei Yan
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Xing Yang
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Bivas Mondal
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Huifang Chai
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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9
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Sarmah BK, Konwar M, Das A. Copper-Catalyzed Oxidative Dehydrogenative Reaction of Quinoline- N-Oxides with Donor-Acceptor Cyclopropanes: Installation of a Tertiary Alkyl Motif at C2 Position. Org Lett 2021; 23:8390-8395. [PMID: 34633204 DOI: 10.1021/acs.orglett.1c03115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A copper-catalyzed oxidative dehydrogenative reaction of quinoline N-oxides with donor-acceptor cyclopropanes has been demonstrated to construct C2-alkylated quinolines containing a γ-keto diester motif. The use of molecular oxygen as an oxidant, excellent site-selectivity, and good functional group tolerance are the important features in this process. The preliminary mechanistic studies demonstrate that the catalyst plays a dual role as a Lewis acid and a redox catalyst.
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Affiliation(s)
- Bikash Kumar Sarmah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Monuranjan Konwar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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10
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Maiti R, Yan JL, Yang X, Mondal B, Xu J, Chai H, Jin Z, Chi YR. Carbene-Catalyzed Enantioselective Hydrophosphination of α-Bromoenals to Prepare Phosphine-Containing Chiral Molecules. Angew Chem Int Ed Engl 2021; 60:26616-26621. [PMID: 34599547 DOI: 10.1002/anie.202112860] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Indexed: 11/07/2022]
Abstract
Disclosed herein is the first carbene-organocatalyzed asymmetric addition of phosphine nucleophiles to the in situ generated α,β-unsaturated acyl azolium intermediates. Our reaction enantioselectively constructs carbon-phosphine bonds and prepares chiral phosphines with high optical purities. The phosphine products are suitable for transforming to chiral ligands or catalysts with applications in asymmetric catalysis. The diarylalkyl or trialkyl phosphine products from our catalytic reactions, air-sensitive and reactive in nature, can be trapped (and stored) in their sulfur-oxidized form for operational simplicities.
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Affiliation(s)
- Rakesh Maiti
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jia-Lei Yan
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Xing Yang
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Bivas Mondal
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Huifang Chai
- Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China.,Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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11
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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]
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12
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Ghosh A, Shee S, Barik S, Gonnade RG, Biju AT. Enantioselective Synthesis of 5,6-Dihydroindolizines by N-Heterocyclic Carbene (NHC)-Catalyzed Core-Structure-Inspired Strategy of Azolium-Enolate Cascade. Org Lett 2021; 23:5223-5228. [PMID: 34160226 DOI: 10.1021/acs.orglett.1c01761] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The core-structure motivated design has allowed the enantioselective synthesis of 5,6-dihydroindolizines via N-heterocyclic carbene (NHC) catalysis. The NHC-catalyzed reaction of α,β-unsaturated aldehydes with the suitably substituted pyrrole derivatives proceed via the initial generation of α,β-unsaturated acylazoliums from enals, and enolates from pyrroles and the reaction culminated in an efficient cascade process involving the Michael-aldol-lactonization-decarboxylation sequence to afford the products in reasonable yields and high selectivities. The method is further extended to the construction of spirocyclic 5,6-dihydroindolizines.
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Affiliation(s)
- Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Shilpa Barik
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Rajesh G Gonnade
- Centre for Materials Characterization, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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13
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Ghosh A, Biju AT. Revealing the Similarities of α,β-Unsaturated Iminiums and Acylazoliums in Organocatalysis. Angew Chem Int Ed Engl 2021; 60:13712-13724. [PMID: 33205860 DOI: 10.1002/anie.202012581] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Indexed: 01/05/2023]
Abstract
The secondary amine-catalyzed reactions proceeding via α,β-unsaturated iminiums and the N-heterocyclic carbene (NHC)-catalyzed transformations taking place via α,β-unsaturated acylazoliums are the two widely used electrophilic intermediates in organocatalysis. Over the last two decades, these two intermediates are extensively utilized for the enantioselective construction of valuable molecules. Both intermediates are generated by the covalent binding of catalysts to the substrates leading to LUMO activation of α,β-unsaturated carbonyls. A variety of soft nucleophiles are known to add to the α,β-unsaturated iminiums and acylazoliums in a conjugate fashion, and in many cases, striking similarity in reactivity has been observed. Having said this, there are few cases where these intermediates exhibit difference in reactivity. This Minireview is aimed at highlighting the resemblances in reactivity between α,β-unsaturated iminiums and acylazoliums thereby shedding light on the unnoticed parallels of the two intermediates in organocatalysis.
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Affiliation(s)
- Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
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14
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Ghosh A, Biju AT. Revealing the Similarities of α,β‐Unsaturated Iminiums and Acylazoliums in Organocatalysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012581] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Arghya Ghosh
- Department of Organic Chemistry Indian Institute of Science Bangalore 560012 India
| | - Akkattu T. Biju
- Department of Organic Chemistry Indian Institute of Science Bangalore 560012 India
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15
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Liu K, Studer A. Direct α-Acylation of Alkenes via N-Heterocyclic Carbene, Sulfinate, and Photoredox Cooperative Triple Catalysis. J Am Chem Soc 2021; 143:4903-4909. [PMID: 33760603 PMCID: PMC8033569 DOI: 10.1021/jacs.1c01022] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Indexed: 12/25/2022]
Abstract
N-Heterocyclic carbene (NHC) catalysis has emerged as a versatile tool in modern synthetic chemistry. Further increasing the complexity, several processes have been introduced that proceed via dual catalysis, where the NHC organocatalyst operates in concert with a second catalytic moiety, significantly enlarging the reaction scope. In biological transformations, multiple catalysis is generally used to access complex natural products. Guided by that strategy, triple catalysis has been studied recently, where three different catalytic modes are merged in a single process. In this Communication, direct α-C-H acylation of various alkenes with aroyl fluorides using NHC, sulfinate, and photoredox cooperative triple catalysis is reported. The method allows the preparation of α-substituted vinyl ketones in moderate to high yields with excellent functional group tolerance. Mechanistic studies reveal that these cascades proceed through a sequential radical addition/coupling/elimination process. In contrast to known triple catalysis processes that operate via two sets of interwoven catalysis cycles, in the introduced process, all three cycles are interwoven.
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Affiliation(s)
- Kun Liu
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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16
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Zhang Q, Das DK, Yang S, Fu Y, Fang X. Mechanistic Studies on N-Heterocyclic Carbene-Catalyzed Umpolung of β,γ-Unsaturated α-Diketones. J Org Chem 2021; 86:4432-4439. [PMID: 33719444 DOI: 10.1021/acs.joc.0c02565] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism of N-heterocyclic carbene-catalyzed umpolung of β,γ-unsaturated α-diketone was studied using both density functional theory (DFT) calculations and experimental methods. In contrast to the originally proposed mechanism, the calculations revealed a more complicated process involving both nucleophilic O-acylated homoenolate and electrophilic α,β-unsaturated acyl azolium intermediates. The experimental studies confirmed the existence of the aforementioned two key intermediates. A revised mechanism has been proposed to demonstrate the detailed mechanistic insights into the product formation.
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Affiliation(s)
- Qi Zhang
- Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China
| | - Deb Kumar Das
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Shuang Yang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
| | - Yao Fu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Xinqiang Fang
- State Key Laboratory of Structural Chemistry, and Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350100, China
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17
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Li Y, Li Z, Zhang Z. Mechanism and regio- and stereoselectivity in an NHC-catalyzed Mannich/lactamization domino reaction. Phys Chem Chem Phys 2021; 23:6204-6212. [PMID: 33687420 DOI: 10.1039/d1cp00369k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Density functional theory (DFT) calculations (M06-2X) have been employed to disclose the mechanisms and regio- and stereo-selectivities of the N-heterocyclic carbene (NHC)-catalyzed reaction of 2-benzothiazolimines and α-chloroaldehydes. The preferred mechanism is initiated by the nucleophilic attack of NHC on α-chloroaldehyde (first step), followed by 1,2-proton transfer which was assisted by the Brønsted acid DABCO·H+ to generate the Breslow intermediate (second step). The cleavage of the C-Cl bond (third step) and deprotonation (fourth step) form the enolate intermediate. This further reacts with 2-benzothiazolimine which leads to the formation of a new C-C bond (fifth step). Subsequent cyclization takes place via the formation of a new C-N bond (sixth step). Catalyst regeneration completes the whole catalytic cycle and affords the final product (seventh step). The DFT results indicate that the fifth step determines the stereochemistry of the reaction and leads to benzothiazolopyrimidinone with the SS configuration, which agrees well with experimental observations. Intramolecular cyclization is found to be the regioselectivity-determining step, for which the [4+2] annulation pathway is more preferred than that via [2+2] annulation, which again agrees well with experimental observations. Based on the mechanism proposed, the origins of regio- and stereoselectivities have also been investigated by performing distortion/interaction, natural bond orbital (NBO) and non-covalent interaction (NCI) analyses. The mechanistic insights gained in this work should be helpful in the rational design of potential catalysts for analogous reactions.
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Affiliation(s)
- Yan Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| | - Zhilin Li
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, P. R. China.
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18
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Wang Z, Liu Q, Wang K, Liu M, Han Y, Sun A, Ma X. NHC‐Catalyzed Oxidative Annulation of α,β‐unsaturated Aldehydes with Benzyl Ketones: Direct Access to 4,5,6‐Trisubstituted Dihydropyranones. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zhan‐Yong Wang
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Qingling Liu
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Kai‐Kai Wang
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Menghan Liu
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Yafei Han
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Aili Sun
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
| | - Xueji Ma
- School of Pharmacy Xinxiang University Xinxiang Henan 453003 P. R. China
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19
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Zhang Y, Zhang Y, Guo J, Han J, Zhou X, Fu Z. Asymmetric synthesis of γ-lactams under low-loading N-heterocyclic carbene catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo00743b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Low-loading N-heterocyclic carbene-catalyzed oxidative formal [3 + 2] annulation of enals with N-Ts diethyl aminomalonate has been successfully developed.
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Affiliation(s)
- Yuxia Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Ye Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Jingcheng Guo
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Jinna Han
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Xiangui Zhou
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China
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20
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Meng Q, Döben N, Studer A. Cooperative NHC and Photoredox Catalysis for the Synthesis of β-Trifluoromethylated Alkyl Aryl Ketones. Angew Chem Int Ed Engl 2020; 59:19956-19960. [PMID: 32700458 PMCID: PMC7693039 DOI: 10.1002/anie.202008040] [Citation(s) in RCA: 118] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Indexed: 01/12/2023]
Abstract
Despite the great potential of radical chemistry in organic synthesis, N-heterocyclic carbene (NHC)-catalyzed reactions involving radical intermediates are not well explored. This communication reports the three-component coupling of aroyl fluorides, styrenes and the Langlois reagent (CF3 SO2 Na) to give various β-trifluoromethylated alkyl aryl ketones with good functional group tolerance in moderate to high yields by cooperative photoredox/NHC catalysis. The alkene acyltrifluoromethylation proceeds via radical/radical cross coupling of ketyl radicals with benzylic C-radicals. The ketyl radicals are generated via SET reduction of in situ formed acylazolium ions whereas the benzylic radicals derive from trifluoromethyl radical addition onto styrenes.
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Affiliation(s)
- Qing‐Yuan Meng
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstrasse 4048149MünsterGermany
| | - Nadine Döben
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstrasse 4048149MünsterGermany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstrasse 4048149MünsterGermany
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21
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Meng Q, Döben N, Studer A. Kooperative NHC‐ und Photoredox‐Katalyse zur Synthese β‐trifluormethylierter Alkylarylketone. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008040] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qing‐Yuan Meng
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Deutschland
| | - Nadine Döben
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Deutschland
| | - Armido Studer
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Deutschland
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22
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Cao J, Gillard R, Jahanbakhsh A, Breugst M, Lupton DW. Enantioselective N-Heterocyclic Carbene Catalysis via Acyl Azolium without Exogenous Oxidants. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02705] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Cao
- School of Chemistry, Monash University, Clayton 3800 Victoria, Australia
| | - Rachel Gillard
- School of Chemistry, Monash University, Clayton 3800 Victoria, Australia
| | - Azar Jahanbakhsh
- Department für Chemie, Universität zu Köln, Cologne 50939, Germany
| | - Martin Breugst
- Department für Chemie, Universität zu Köln, Cologne 50939, Germany
| | - David W. Lupton
- School of Chemistry, Monash University, Clayton 3800 Victoria, Australia
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23
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Wu YT, Zhang R, Duan XY, Yu HF, Sun BY, Qi J. Access to dihydropyrano[3,2- b]pyrrol-5-ones skeletons by N-heterocyclic carbene-catalyzed [3+3] annulations. Chem Commun (Camb) 2020; 56:9854-9857. [PMID: 32840527 DOI: 10.1039/d0cc04661b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel and efficient NHC-catalyzed [3+3] annulation of enals with pyrrol-4-ones was developed, thus providing the dihydropyrano[3,2-b]pyrrol-5-one core structures with broad scope and good to excellent enantioselectivities. Notably, this strategy could also expand to the synthesis of axially chiral compounds and polysubstituted indoles.
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Affiliation(s)
- Ya-Tong Wu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China.
| | - Rui Zhang
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China.
| | - Xiao-Yong Duan
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China. and Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
| | - Hai-Fei Yu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China.
| | - Bo-Yu Sun
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China.
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China. and Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
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24
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Sharique M, Tambar UK. N-Heterocyclic carbene based catalytic platform for Hauser-Kraus annulations. Chem Sci 2020; 11:7239-7243. [PMID: 34123009 PMCID: PMC8159274 DOI: 10.1039/d0sc03116j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The venerable Hauser–Kraus annulation is an effective and convergent method for generating oxygenated polycyclic aromatic compounds. Despite its application in complex molecule synthesis, the harsh and strongly basic conditions can limit its utility in more functionalized molecular settings. We have developed the first catalytic Hauser–Kraus annulation based on N-heterocyclic carbene catalysis that proceeds under milder conditions. We demonstrate the scope of the transformation in the presence of several functional groups. We also propose a concerted mechanism for the annulation that proceeds through a non-canonical Breslow intermediate. The venerable Hauser–Kraus annulation is an effective and convergent method for generating oxygenated polycyclic aromatic compounds. A catalytic Hauser–Kraus annulation has been developed based on N-heterocyclic carbene catalysis.![]()
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Affiliation(s)
- Mohammed Sharique
- The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas Texas 75390-9038 USA
| | - Uttam K Tambar
- The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas Texas 75390-9038 USA
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25
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Wang C, Wang Z, Yang J, Shi SH, Hui XP. Sequential Visible-Light and N-Heterocyclic Carbene Catalysis: Stereoselective Synthesis of Tetrahydropyrano[2,3-b]indoles. Org Lett 2020; 22:4440-4443. [DOI: 10.1021/acs.orglett.0c01447] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Chengyuan Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zheyuan Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jin Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shi-Hui Shi
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000, Shaanxi, P. R. China
| | - Xin-Ping Hui
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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26
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Brandolese A, Ragno D, Leonardi C, Di Carmine G, Bortolini O, De Risi C, Massi A. Enantioselective N
-Acylation of Biginelli Dihydropyrimidines by Oxidative NHC Catalysis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Arianna Brandolese
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari, 46 44121 Ferrara Italy
| | - Daniele Ragno
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari, 46 44121 Ferrara Italy
| | - Costanza Leonardi
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari, 46 44121 Ferrara Italy
| | - Graziano Di Carmine
- School of Chemical Engineering and Analytical Science; The University of Manchester; M13 9PL Manchester UK
| | - Olga Bortolini
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari, 46 44121 Ferrara Italy
| | - Carmela De Risi
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari, 46 44121 Ferrara Italy
| | - Alessandro Massi
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari, 46 44121 Ferrara Italy
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27
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Gao Z, Xia Z, Dai L, Ye S. N‐Heterocyclic Carbene Catalyzed Photooxidation: Intramolecular Cross Dehydrogenative Coupling of Tetrahydroisoquinoline‐Tethered Aldehydes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000164] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Zhong‐Hua Gao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
| | - Zi‐Hao Xia
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Lei Dai
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
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28
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Wang ZY, Yang T, Wang KK, Chen R, Liu M, Liu H. Oxidative N-heterocyclic carbene-catalyzed [3 + 3] annulation reaction of enals with benzofuran-3-ones: efficient access to benzofuran-fused δ-lactones. Org Chem Front 2020. [DOI: 10.1039/d0qo00161a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile route to benzofuran-fused δ-lactones was developed via an N-heterocyclic carbene-catalyzed [3 + 3] annulation reaction, giving the expected products in high yields (up to 99%) with excellent enantioselectivities (up to 98% ee).
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Affiliation(s)
- Zhan-Yong Wang
- College of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453003
- P. R. China
| | - Ting Yang
- Medical College
- Xinxiang University
- Xinxiang 453003
- P. R. China
| | - Kai-Kai Wang
- College of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453003
- P. R. China
| | - Rongxiang Chen
- College of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453003
- P. R. China
| | - Menghan Liu
- College of Chemistry and Chemical Engineering
- Xinxiang University
- Xinxiang 453003
- P. R. China
| | - Hongxin Liu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P.R. China
- Institute of New Materials & Industrial Technology
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29
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Liu Q, Chen XY. Dual N-heterocyclic carbene/photocatalysis: a new strategy for radical processes. Org Chem Front 2020. [DOI: 10.1039/d0qo00494d] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Dual N-heterocyclic carbene/photocatalysis displays unique features compared with the traditional methods and indicates high potential for new radical processes.
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Affiliation(s)
- Qiang Liu
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
| | - Xiang-Yu Chen
- School of Chemical Sciences
- University of the Chinese Academy of Sciences
- Beijing 100049
- China
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30
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Talukdar R. Ir III-Catalyzed direct syntheses of amides and esters using nitriles as acid equivalents: a photochemical pathway. NEW J CHEM 2020. [DOI: 10.1039/d0nj00002g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An unprecedented IrIII[df(CF3)ppy]2(dtbbpy)PF6-catalyzed simple photochemical process for direct addition of amines and alcohols to the relatively less reactive nitrile triple bond is described herein.
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Affiliation(s)
- Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory
- Centre of Biomedical Research
- Sanjay Gandhi Postgraduate Institute of Medical Sciences
- Lucknow 226014
- India
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31
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Li T, Wang J, Xu J, Jin J, Chi YR, Jin Z. Enantio- and Diastereoselective Synthesis of Chromeno[4,3-b]pyrrole Derivatives Bearing Tetrasubstituted Chirality Centers through Carbene Catalyzed Cascade Reactions. Org Lett 2019; 22:326-330. [DOI: 10.1021/acs.orglett.9b04371] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Tingting Li
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Jilan Wang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Jun Xu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Huaxi District, Guiyang 550025, China
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Jiamiao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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32
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N-Heterocyclic Carbene (NHC)/Metal Cooperative Catalysis. Top Curr Chem (Cham) 2019; 377:35. [DOI: 10.1007/s41061-019-0266-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 11/05/2019] [Indexed: 10/25/2022]
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33
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Anwar M, Yang S, Xu W, Liu J, Perveen S, Kong X, Zehra ST, Fang X. Carbene-catalyzed asymmetric Friedel–Crafts alkylation-annulation sequence and rapid synthesis of indole-fused polycyclic alkaloids. Commun Chem 2019. [DOI: 10.1038/s42004-019-0188-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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34
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Liu Y, Chen Q, Mou C, Pan L, Duan X, Chen X, Chen H, Zhao Y, Lu Y, Jin Z, Chi YR. Catalytic asymmetric acetalization of carboxylic acids for access to chiral phthalidyl ester prodrugs. Nat Commun 2019; 10:1675. [PMID: 30975988 PMCID: PMC6459872 DOI: 10.1038/s41467-019-09445-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 03/12/2019] [Indexed: 12/21/2022] Open
Abstract
Carboxylic acids are common moieties in medicines. They can be converted to phthalidyl esters as prodrugs. Unfortunately, phthalidyl esters are now mostly prepared in racemic forms. This is not desirable because the two enantiomers of phthalidyl esters likely have different pharmacological effects. Here we address the synthetic challenges in enantioselective modification of carboxylic acids via asymmetric acetalizations. The key reaction step involves asymmetric addition of a carboxylic acid to the catalyst-bound intermediate. This addition step enantioselectively constructs a chiral acetal unit that lead to optically enriched phthalidyl esters. A broad range of carboxylic acids react effectively under mild and transition metal-free conditions. Preliminary bioactivity studies show that the two enantiomers of chlorambucil phthalidyl esters exhibit different anti-cancer activities to inhibit the growth of Hela cells. Our catalytic strategy of asymmetric acetalizations of carboxylic acids shall benefit future development of chiral phthalidyl ester prodrugs and related molecules. Phthalidyl esters, commonly used prodrug moieties, are mostly prepared as a racemate. Here, the authors report an N-heterocylcic carbene-catalysed enantioselective acetalization of carboxylic acids and dialdehydes to give phthalidyl esters in high yields with good enantioselectivity.
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Affiliation(s)
- Yingguo Liu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Qiao Chen
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Chengli Mou
- School of Pharmacy, Guiyang University of Chinese Medicine, Huaxi District, Guiyang, 550025, China
| | - Lutai Pan
- School of Pharmacy, Guiyang University of Chinese Medicine, Huaxi District, Guiyang, 550025, China.
| | - Xiaoyong Duan
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Xingkuan Chen
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Hongzhong Chen
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Yanli Zhao
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Yunpeng Lu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore. .,Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China.
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35
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Balaboina R, Thirukovela N, Kankala S, Balasubramanian S, Bathula SR, Vadde R, Jonnalagadda SB, Vasam CS. Synergistic Catalysis of Ag(I) and Organo‐
N
‐heterocyclic Carbenes: One‐Pot Synthesis of New Anticancer Spirooxindole‐1,4‐dihydropyridines. ChemistrySelect 2019. [DOI: 10.1002/slct.201803507] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ramesh Balaboina
- Department of ChemistryKakatiya University Warangal- 506009, Telangana State India
| | | | - Shravankumar Kankala
- Department of ChemistryKakatiya University Warangal- 506009, Telangana State India
| | - Sridhar Balasubramanian
- X-ray Crystallography DivisionCSIR–Indian Institute of Chemical Technology Hyderabad- 500007, Telangana State India
| | - Surendar Reddy Bathula
- Division of Natural Product ChemistryCSIR-Indian Institute of Chemical Technology Hyderabad- 500007, Telangana State India
| | - Ravinder Vadde
- Department of ChemistryKakatiya University Warangal- 506009, Telangana State India
| | - Sreekantha B Jonnalagadda
- School of Chemistry and PhysicsUniversity of Kwazulu-NatalWestville Campus, Chiltern Hills, Durban- 4000, South Africa
| | - Chandra Sekhar Vasam
- Department of Pharmaceutical ChemistryTelangana University Nizamabad- 503322, Telangana State India
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36
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Mondal S, Yetra SR, Mukherjee S, Biju AT. NHC-Catalyzed Generation of α,β-Unsaturated Acylazoliums for the Enantioselective Synthesis of Heterocycles and Carbocycles. Acc Chem Res 2019; 52:425-436. [PMID: 30653296 DOI: 10.1021/acs.accounts.8b00550] [Citation(s) in RCA: 225] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This Account is aimed at highlighting the recent developments in the N-heterocyclic carbene (NHC)-catalyzed generation of α,β-unsaturated acylazolium intermediates and their subsequent reactivity with (bis)nucleophiles thereby shedding light on the power of this NHC-bound intermediate in organocatalysis. This key intermediate can be generated by the addition of NHCs to α,β-unsaturated aldehyde or acid derivatives. A wide variety of bisnucleophiles can add across the α,β-unsaturated acylazoliums to form various five and six-membered heterocycles and carbocycles. Moreover, suitably substituted nucleophiles can add to this intermediate and result in valuable products following cascade processes. Employing chiral NHCs in the process can result in the enantioselective synthesis of valuable compounds. In 2013, we developed a unified strategy for the enantioselective synthesis of dihydropyranones and dihydropyridinones by the NHC-catalyzed formal [3 + 3] annulation of 2-bromoenals with readily available 1,3-dicarbonyl compounds or primary vinylogous amides. This reaction takes place under mild conditions with low catalyst loading. Interestingly, employing enolizable aldehydes as the bisnucleophiles in this annulation afforded chiral 4,5-disubstituted dihydropyranones in spite of the competing benzoin/Stetter pathways. Moreover, the use of cyclic 1,3-dicarbonyl compounds such as 4-hydroxy coumarin/pyrazolone afforded the coumarin/pyrazole-fused dihydropyranones. In addition, a [3 + 2] annulation for the synthesis of spiro γ-butyrolactones was demonstrated using 3-hydroxy oxindoles as the bisnucleophile. The interception of α,β-unsaturated acylazolium intermediates with malonic ester derivatives having a γ-benzoyl group resulted in the enantioselective synthesis of functionalized cyclopentenes via a cascade process involving a Michael-intramolecular aldol-β-lactonization-decarboxylation sequence. The use of cyclic β-ketoamides as the coupling partner for catalytically generated α,β-unsaturated acylazoliums resulted in the enantioselective synthesis of spiro-glutarimide and the reaction proceeds in a Michael addition-intramolecular amidation pathway. We have recently demonstrated the enantioselective synthesis of tricyclic δ-lactones with three contiguous stereocenters by the reaction of enals with dinitrotoluene derivatives bearing electron-withdrawing groups, under oxidative conditions. This atom-economic cascade reaction proceeds in a Michael/Michael/lactonization sequence tolerating a range of functional groups. This technique was also used for the N-H functionalization of indoles for the enantioselective synthesis of pyrroloquinolines following the aza-Michael/Michael/lactonization sequence. The use of α-arylidene pyrazolinones as the bisnucleophiles for the tandem generation of dienolate/enolates combined with the NHC-catalyzed generation of α,β-unsaturated acylazoliums resulted in the enantioselective synthesis of pyrazolone-fused spirocyclohexadienones. This formal [3 + 3] annulation proceeds via the vinylogous Michael/spiroannulation/dehydrogenation sequence to afford spirocyclic compounds with an all-carbon quaternary stereocenter. It is reasonable to believe that the chemistry of α,β-unsaturated acylazoliums, catalytically generated through NHCs, will continue to flourish and will lead to amazing results. Future challenges in this area include the applications of this key intermediate in the synthesis of biologically active natural products and drugs.
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Affiliation(s)
- Santigopal Mondal
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | | | - Subrata Mukherjee
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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37
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Ametovski A, Lupton DW. Enantioselective Total Synthesis of (−)-Δ9-Tetrahydrocannabinol via N-Heterocyclic Carbene Catalysis. Org Lett 2019; 21:1212-1215. [DOI: 10.1021/acs.orglett.9b00198] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Adam Ametovski
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - David W. Lupton
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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38
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Gao Y, Liu D, Fu Z, Huang W. Facile Synthesis of 2,2-Diacyl Spirocyclohexanones via an N-Heterocyclic Carbene-Catalyzed Formal [3C + 3C] Annulation. Org Lett 2019; 21:926-930. [PMID: 30714381 DOI: 10.1021/acs.orglett.8b03892] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A novel strategy for the construction of 2,2-diacyl spirocyclohexanones 3 has been demonstrated on the basis of an NHC-catalyzed [3C + 3C] annulation of potassium 2-oxo-3-enoates with 2-ethylidene 1,3-indandiones. Furthermore, enantioenriched 3 was obtained in good to excellent yields with good enantioselectivities when chiral N-heterocyclic carbene (NHC) was employed. Notably, ring opening of the resulting 2,2-diacyl spirocyclohexanones 3 with hydrazine led to the formation of phthalazinones in good to excellent yields.
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Affiliation(s)
- Yaru Gao
- Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , 127 West Youyi Road , Xi'an 710072 , China.,Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Dehai Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Zhenqian Fu
- Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , 127 West Youyi Road , Xi'an 710072 , China.,Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
| | - Wei Huang
- Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , 127 West Youyi Road , Xi'an 710072 , China.,Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211816 , China
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39
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Lang M, Wang J. A carbene-catalyzed tandem isomerization/cyclisation strategy: an efficient assembly of benzoxazinones. Org Chem Front 2019. [DOI: 10.1039/c9qo00094a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An unprecedented example of NHC-catalyzed tandem isomerization/cyclisation is reported to synthesize benzoxazinones.
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Affiliation(s)
- Ming Lang
- School of Pharmaceutical Sciences
- Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing
- China
| | - Jian Wang
- School of Pharmaceutical Sciences
- Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing
- China
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40
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Wu Z, Jiang D, Wang J. Carbene-catalyzed oxidative acylation promoted by an unprecedented oxidant CCl 3CN. Org Chem Front 2019. [DOI: 10.1039/c8qo01420e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An unprecedented example of a NHC-catalyzed acylation reaction is promoted by CCl3CN as an oxidant.
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Affiliation(s)
- Zijun Wu
- School of Pharmaceutical Sciences
- Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing
- China
| | - Di Jiang
- School of Pharmaceutical Sciences
- Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing
- China
| | - Jian Wang
- School of Pharmaceutical Sciences
- Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education)
- Tsinghua University
- Beijing
- China
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41
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Wu X, Zhou L, Maiti R, Mou C, Pan L, Chi YR. Sulfinate and Carbene Co-catalyzed Rauhut-Currier Reaction for Enantioselective Access to Azepino[1,2-a]indoles. Angew Chem Int Ed Engl 2018; 58:477-481. [PMID: 30398684 DOI: 10.1002/anie.201810879] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Indexed: 12/12/2022]
Abstract
A carbene and sulfinate co-catalyzed intermolecular Rauhut-Currier reaction between enals and nitrovinyl indoles is disclosed. The carbene catalyst activates the enal and the sulfinate co-catalyst activates the nitrovinyl indole. Both activation processes are realized via the formation of covalent bonds between the catalysts and substrates to generate catalyst-bound intermediates. The dual catalytic reaction affords azepino[1,2-a]indole products with excellent stereoselectivity. Our study demonstrates the unique involvement of sulfinate as an effective nucleophilic catalyst in activating electron-deficient alkenes for asymmetric reactions. This dual catalytic approach should also encourage future explorations of both sulfinate and carbene catalysts for new reactions.
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Affiliation(s)
- Xingxing Wu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Liejin Zhou
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Rakesh Maiti
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Chengli Mou
- Guiyang College of Traditional Chinese Medicine, Guizhou, P. R. China
| | - Lutai Pan
- Guiyang College of Traditional Chinese Medicine, Guizhou, P. R. China
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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42
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Wu X, Zhou L, Maiti R, Mou C, Pan L, Chi YR. Sulfinate and Carbene Co‐catalyzed Rauhut–Currier Reaction for Enantioselective Access to Azepino[1,2‐
a
]indoles. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xingxing Wu
- Division of Chemistry & Biological ChemistrySchool of Physical & Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Liejin Zhou
- Division of Chemistry & Biological ChemistrySchool of Physical & Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Rakesh Maiti
- Division of Chemistry & Biological ChemistrySchool of Physical & Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
| | - Chengli Mou
- Guiyang College of Traditional Chinese Medicine Guizhou P. R. China
| | - Lutai Pan
- Guiyang College of Traditional Chinese Medicine Guizhou P. R. China
| | - Yonggui Robin Chi
- Division of Chemistry & Biological ChemistrySchool of Physical & Mathematical SciencesNanyang Technological University Singapore 637371 Singapore
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43
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Liu Q, Chen XY, Puttreddy R, Rissanen K, Enders D. N-Heterocyclic Carbene Catalyzed Quadruple Domino Reactions: Asymmetric Synthesis of Cyclopenta[c]chromenones. Angew Chem Int Ed Engl 2018; 57:17100-17103. [PMID: 30394638 DOI: 10.1002/anie.201810402] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/18/2018] [Indexed: 11/07/2022]
Abstract
An N-heterocyclic carbene catalyzed domino sequence via α,β-unsaturated acyl azolium intermediates has been developed. This strategy provides a convenient enantioselective route to functionalized tricyclic coumarin derivatives and cyclopentanes. DFT studies and control experiments were performed to gain better insight into the reaction mechanism.
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Affiliation(s)
- Qiang Liu
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Xiang-Yu Chen
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Rakesh Puttreddy
- Department of Chemistry, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland
| | - Kari Rissanen
- Department of Chemistry, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
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44
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Liu Q, Chen X, Puttreddy R, Rissanen K, Enders D. N‐Heterocyclic Carbene Catalyzed Quadruple Domino Reactions: Asymmetric Synthesis of Cyclopenta[
c
]chromenones. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiang Liu
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Xiang‐Yu Chen
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Rakesh Puttreddy
- Department of Chemistry University of Jyväskylä P.O. Box 35 40014 Jyväskylä Finland
| | - Kari Rissanen
- Department of Chemistry University of Jyväskylä P.O. Box 35 40014 Jyväskylä Finland
| | - Dieter Enders
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 52074 Aachen Germany
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45
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Pandey G, Koley S, Talukdar R, Sahani PK. Cross-Dehydrogenating Coupling of Aldehydes with Amines/R-OTBS Ethers by Visible-Light Photoredox Catalysis: Synthesis of Amides, Esters, and Ureas. Org Lett 2018; 20:5861-5865. [DOI: 10.1021/acs.orglett.8b02537] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India
| | - Suvajit Koley
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India
| | - Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India
| | - Pramod Kumar Sahani
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India
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46
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Chowdhury SR, Hoque IU, Maity S. TBAI/TBHP-Promoted Generation of Malonyl Radicals: Oxidative Coupling with Styrenes Leads to γ-Keto Diesters. Chem Asian J 2018; 13:2824-2828. [DOI: 10.1002/asia.201800992] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/23/2018] [Indexed: 01/04/2023]
Affiliation(s)
- Soumyadeep Roy Chowdhury
- Department of Applied Chemistry; Indian Institute of Technology (ISM) Dhanbad; Dhanbad 826004 JH India
| | - Injamam Ul Hoque
- Department of Applied Chemistry; Indian Institute of Technology (ISM) Dhanbad; Dhanbad 826004 JH India
| | - Soumitra Maity
- Department of Applied Chemistry; Indian Institute of Technology (ISM) Dhanbad; Dhanbad 826004 JH India
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47
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Mukherjee S, Biju AT. Recent Advances in the Organocatalytic Enantioselective Synthesis of Functionalized β-Lactones. Chem Asian J 2018; 13:2333-2349. [DOI: 10.1002/asia.201800902] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/20/2018] [Indexed: 01/25/2023]
Affiliation(s)
- Subrata Mukherjee
- Organic Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Akkattu T. Biju
- Department of Organic Chemistry; Indian Institute of Science; Bangalore 560012 India
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48
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Mondal S, Ghosh A, Mukherjee S, Biju AT. N-Heterocyclic Carbene-Catalyzed Enantioselective Synthesis of Spiro-glutarimides via α,β-Unsaturated Acylazoliums. Org Lett 2018; 20:4499-4503. [DOI: 10.1021/acs.orglett.8b01799] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Santigopal Mondal
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Subrata Mukherjee
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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49
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Chen XY, Li S, Liu Q, Kumar M, Peuronen A, Rissanen K, Enders D. Highly Enantioselective Kinetic Resolution of Michael Adducts through N-Heterocyclic Carbene Catalysis: An Efficient Asymmetric Route to Cyclohexenes. Chemistry 2018; 24:9735-9738. [DOI: 10.1002/chem.201802420] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 05/30/2018] [Indexed: 01/18/2023]
Affiliation(s)
- Xiang-Yu Chen
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Sun Li
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Qiang Liu
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Mukesh Kumar
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Anssi Peuronen
- Department of Chemistry, Nanoscience Center; University of Jyvaskyla; 40014 JYU Finland
| | - Kari Rissanen
- Department of Chemistry, Nanoscience Center; University of Jyvaskyla; 40014 JYU Finland
| | - Dieter Enders
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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50
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Lang M, Jia Q, Wang J. N-Heterocyclic Carbene-Catalyzed Annulation of Ylides with Ynals: Direct Access to α-Pyrones. Chem Asian J 2018; 13:2427-2430. [DOI: 10.1002/asia.201800595] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 05/15/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Ming Lang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 P. R. China
| | - Qianfa Jia
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 P. R. China
| | - Jian Wang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education); Tsinghua University; Beijing 100084 P. R. China
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