1
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Zhao Y, Zhang Y, Huang Y. Enantioselective Relay Coupling of Perfluoroalkyl and Vinylogous Ketyl Radicals. Angew Chem Int Ed Engl 2024; 63:e202409566. [PMID: 38865105 DOI: 10.1002/anie.202409566] [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: 05/21/2024] [Revised: 06/12/2024] [Accepted: 06/12/2024] [Indexed: 06/13/2024]
Abstract
β-Chiral carboxylic acids and their derivatives are highly valuable structural motifs in the fields of asymmetric synthesis and medicinal chemistry. However, the introduction of a sterically demanding sidechain to the β-carbon, such as an all-carbon quaternary center, remains a significant challenge in classical polar processes. Recently, N-heterocyclic carbene (NHC) mediated coupling reactions involving persistent ketyl radicals have emerged as a promising strategy to assemble highly crowded carbon-carbon bonds. Nevertheless, achieving enantioselectivity in these reactions remains highly challenging. In this work, we report our recent progress in controlling enantioselectivity for relay coupling of perfluoroalkyl and persistent vinylogous ketyl radicals. We developed a chiral bifunctional NHC-squaramide catalyst that achieves high facial selectivity in a critical bond-forming event involving the coupling of a congested tertiary carbon radical and vinylogous ketyl radical. Chiral carboxylates bearing an all-carbon quaternary center at the β-position can be prepared in good yield and excellent enantiomeric excess. Results from density functional theory (DFT) calculations and nuclear Overhauser effect (NOE) experiments indicate that the N,N'-diaryl squaramide motif adopts an unusual syn-syn conformation, enabling hydrogen bonding interactions with the enolate oxygen, thereby rigidifying the overall conformation of the transition state.
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Affiliation(s)
- Yuxin Zhao
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yichi Zhang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yong Huang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, 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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Deng R, Pan M, Liu J, Zheng P, Chi YR. Carbene-Catalyzed Enantioselective Addition of Sulfinate to Ketones. Org Lett 2024; 26:4394-4399. [PMID: 38742796 DOI: 10.1021/acs.orglett.4c01473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
A carbene-catalyzed enantioselective addition of sulfinate to ketones between 2-benzoylbenzaldehyde and sulfonyl chloride is disclosed. Up to now, the carbon and heteroatom nucleophiles have effectively undergone catalytic enantioselective addition to carbonyl molecules to introduce functionalities and chirality. Sulfone, as an important class of sulfur-containing functional groups, represents highly valuable motifs in medicines and natural products. It remains undeveloped for the catalytic asymmetric addition of sulfinate to carbonyls. Herein we disclosed the first catalytic enantioselective addition of sulfinate to ketones for the synthesis of sulfones via N-heterocyclic carbene (NHC) catalysis. The sulfonyl chloride behaves both as an oxidant and as a nucleophilic substrate in this carbene-catalyzed process. Experimental studies suggested that the Breslow intermediate can be SET oxidized by sulfonyl chloride to generate the sulfonyl radical. This novel synthetic approach for the asymmetric addition of sulfinate to carbonyls can also be used to modify the commercially available functional molecules.
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Affiliation(s)
- Rui Deng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China
| | - Mingyi Pan
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China
| | - Jianjian Liu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China
| | - Pengcheng Zheng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, People's Republic of China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
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4
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Peng L, Wang M, Huang J, Guo C, Gong LZ, Song J. Enantio- and Diastereodivergent N-Heterocyclic Carbene/Nickel Dual-Catalyzed Umpolung Propargylic Substitutions of Enals. J Am Chem Soc 2023; 145:28085-28095. [PMID: 38032206 DOI: 10.1021/jacs.3c09569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
The creation of full stereoisomers of an organic compound comprising multiple contiguous stereocenters with simultaneous control over both relative and absolute configurations remains a significant challenge in synthetic chemistry. Using a cooperative catalysis strategy, we established an N-heterocyclic carbene/nickel-catalyzed enantio- and diastereodivergent propargylation reaction to access 3,3'-disubstituted oxindoles, enabling the incorporation of internal alkyne functionality and the introduction of a single quaternary or vicinal quaternary/tertiary stereogenic center. By selecting the appropriate combination of catalyst chirality, all four potential stereoisomers of α-quaternary propargylated oxindoles were synthesized in a predictable and precise way with remarkable yields, diastereoselectivities, and enantioselectivities from identical starting materials. The synthetic utility of this method was demonstrated in the concise asymmetric total synthesis of (-)-debromoflustramine B and (-)-C(β-Me)-debromoflustramine B.
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Affiliation(s)
- Lingzi Peng
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Mingxu Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jianming Huang
- Institutes of Physical Science and Information Technology, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China
| | - Chang Guo
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China
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5
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Barańska I, Rafińska K, Rafiński Z. Enantioselective Synthesis of Highly Substituted Fluoroalkylated Benzopyranones and 3-Coumaranones via N-Heterocyclic Carbene-Catalyzed Intramolecular Annulations. J Org Chem 2023; 88:14339-14344. [PMID: 37793100 PMCID: PMC10594660 DOI: 10.1021/acs.joc.3c01099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Indexed: 10/06/2023]
Abstract
A highly enantioselective intramolecular NHC-catalyzed approach for the synthesis of fluoroalkylated benzopyranones and 3-coumaranones with all-carbon quaternary stereocenters is presented. This reaction is catalyzed by N-heterocyclic carbenes (NHCs) and involves annulation reactions between in situ generated acyl anion intermediates and highly substituted trifluoromethyl-β,β-disubstituted Michael acceptors. The method can also be extended to perfluoroalkyl homologues.
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Affiliation(s)
- Izabela Barańska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarin Street, Torun 87-100, Poland
| | - Katarzyna Rafińska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarin Street, Torun 87-100, Poland
| | - Zbigniew Rafiński
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarin Street, Torun 87-100, Poland
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6
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Li E, Tang K, Ren Z, Liao X, Liu Q, Huang Y, Chen J. Enantioselective S N 2 Alkylation of Homoenolates by N-Heterocyclic Carbene Catalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303517. [PMID: 37541670 PMCID: PMC10582416 DOI: 10.1002/advs.202303517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/17/2023] [Indexed: 08/06/2023]
Abstract
The functionalization of the β-carbon of enals with electrophiles is a signature umpolung reactivity of N-heterocyclic carbene (NHC) derived homoenolates. However, only a limited number of electrophiles are shown to be compatible, with most of them being π-electrophiles. In this study, the successful enantioselective β-alkylation of homoenolates is reported using Csp3 electrophiles through an SN 2 strategy. The protocol shows a broad scope regarding alkyl electrophiles, delivering good yields, and excellent enantioselectivities (up to 99% ee). It enables the installation of drug-like structural motifs in either enals or alkylating agents, demonstrating its potential as a valuable tool for late-stage modification. Furthermore, a concise synthetic route is presented to chiral pyrroloindoline-type skeletons. Preliminary mechanistic studies support a direct SN 2 mechanism.
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Affiliation(s)
- En Li
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Kai Tang
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Zhuhui Ren
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Xiaoyun Liao
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
| | - Qianchen Liu
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
- College of PharmacyShenzhen Technology UniversityShenzhen518118China
| | - Yong Huang
- Department of ChemistryThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SAR999077China
| | - Jiean Chen
- Pingshan Translational Medicine CenterShenzhen Bay LaboratoryShenzhen518118China
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7
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Wang Q, Wu S, Zou J, Liang X, Mou C, Zheng P, Chi YR. NHC-catalyzed enantioselective access to β-cyano carboxylic esters via in situ substrate alternation and release. Nat Commun 2023; 14:4878. [PMID: 37573355 PMCID: PMC10423276 DOI: 10.1038/s41467-023-40645-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 08/04/2023] [Indexed: 08/14/2023] Open
Abstract
A carbene-catalyzed asymmetric access to chiral β-cyano carboxylic esters is disclosed. The reaction proceeds between β,β-disubstituted enals and aromatic thiols involving enantioselective protonation of enal β-carbon. Two main factors contribute to the success of this reaction. One involves in situ ultrafast addition of the aromatic thiol substrates to the carbon-carbon double bond of the enal substrate. This reaction converts almost all enal substrate to a Thiol-click Intermediate, significantly reducing aromatic thiol substrates concentration and suppressing the homo-coupling reaction of enals. Another factor is an in situ release of enal substrate from the Thiol-click Intermediate for the desired reaction to proceed effectively. The optically enriched β-cyano carboxylic esters from our method can be readily transformed to medicines that include γ-aminobutyric acids derivatives such as Rolipram. In addition to synthetic utilities, our control of reaction outcomes via in situ substrate modulation and release can likely inspire future reaction development.
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Affiliation(s)
- Qingyun Wang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Shuquan Wu
- Center for Industrial Catalysis and Cleaning Process Development, School of Chemical Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Juan Zou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Xuyang Liang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Chengli Mou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Pengcheng Zheng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, 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, Guiyang, 550025, China.
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore.
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8
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Li S, Wen YH, Song J, Gong LZ. Asymmetric redox benzylation of enals enabled by NHC/Ru cooperative catalysis. SCIENCE ADVANCES 2023; 9:eadf5606. [PMID: 37075106 PMCID: PMC10115414 DOI: 10.1126/sciadv.adf5606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The development of general methods for asymmetric benzylation of prochiral carbon nucleophiles remains a challenge in organic synthesis. The merging of ruthenium catalysis and N-heterocyclic carbene (NHC) catalysis for asymmetric redox benzylation of enals has been achieved, which opens up strategic opportunities for the asymmetric benzylation reactions. A wide range of 3,3'-disubstituted oxindoles with a stereogenic quaternary carbon center widely existing in natural products and biologically interesting molecules is successfully obtained with excellent enantioselectivities [up to 99% enantiomeric excess (ee)]. The generality of this catalytic strategy was further highlighted by its successful application in the late-stage functionalization of oxindole skeletons. Furthermore, the linear correlation between ee values of NHC precatalyst and the product elucidated the independent catalytic cycle of either the NHC catalyst or the ruthenium complex.
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Affiliation(s)
- Shuai Li
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Yu-Hua Wen
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China
- Corresponding author. (L.-Z. G.); (J. S.)
| | - Liu-Zhu Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei 230026, China
- Corresponding author. (L.-Z. G.); (J. S.)
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9
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Man Y, Zeng X, Xu B. Synthesis of Thioesters from Aldehydes via N-Heterocyclic Carbene (NHC) Catalyzed Radical Relay. Chemistry 2023; 29:e202203716. [PMID: 36583288 DOI: 10.1002/chem.202203716] [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: 11/29/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 12/31/2022]
Abstract
We have developed an efficient N-heterocyclic carbene (NHC)-catalyzed thioesterification of aldehydes using N-thiosuccinimides as the thiolation reagent. This organocatalyzed transition involves the generation of sulfur radicals by single electron transfer of the Breslow enolate (generated from aldehyde and NHC catalyst) with N-thiosuccinimides. This method offers facile access to various highly functionalized thioesters and exhibits good chemical yields and functional group tolerance.
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Affiliation(s)
- Yunquan Man
- College of Chemistry and Chemical Engineering, Donghua University, 2999 North Renmin Road, 201620, Shanghai, China
| | - Xiaojun Zeng
- School of Chemistry and chemical Engineering, Nanchang University, 330031, Nanchang, Jiangxi, China
| | - Bo Xu
- College of Chemistry and Chemical Engineering, Donghua University, 2999 North Renmin Road, 201620, Shanghai, China
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10
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Wen YH, Yang F, Li S, Yao X, Song J, Gong LZ. Diastereodivergent Desymmetric Annulation to Access Spirooxindoles: Chemical Probes for Mitosis. J Am Chem Soc 2023; 145:4199-4207. [PMID: 36780205 DOI: 10.1021/jacs.2c12648] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Spirooxindoles have emerged as promising architectures for engineering biologically active compounds. The diastereodivergent construction of unique scaffolds of this type with full control of continuous chiral centers including an all-carbon quaternary stereogenic center is yet to be developed. Here, we report an unprecedented diastereodivergent desymmetric [3 + 3] annulation of oxabicyclic alkenes with enals enabled by N-heterocyclic carbene (NHC)/Rh cooperative catalysis, leading to a series of enantiomerically enriched spirooxindole lactones with excellent enantioselectivities (up to >99% ee) and diastereoselectivities (up to >95:5 dr). The combined catalyst system comprises a rhodium complex that controls the configuration at the electrophilic carbon and an NHC catalyst that controls the configuration at the nucleophilic oxindole-containing carbon; thus, four stereoisomers of the spirooxindole products can be readily obtained simply by switching the configurations of the two chiral catalysts. Transformations of the chiral spirooxindoles delivered synthetically useful compounds. Importantly, those chiral spirooxindoles arrested mammalian cells in mitosis and exhibited potent antiproliferative activities against HeLa cells. Significantly, both absolute and relative configurations exert prominent effects on the bioactivities, underscoring great importance of catalytic asymmetric diastereodivergent synthesis beyond creating useful tools for the exploration of structure-activity relationships.
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Affiliation(s)
- Yu-Hua Wen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Fengrui Yang
- MOE Key Laboratory for Cellular Dynamics and Hefei National Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Shuai Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Xuebiao Yao
- MOE Key Laboratory for Cellular Dynamics and Hefei National Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei 230601, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei 230026, China
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11
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Assembly of versatile fluorine-containing structures via N-heterocyclic carbene organocatalysis. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1291-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Desymmetrization of N-Cbz glutarimides through N-heterocyclic carbene organocatalysis. Nat Commun 2022; 13:4042. [PMID: 35831292 PMCID: PMC9279320 DOI: 10.1038/s41467-022-31760-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/29/2022] [Indexed: 01/12/2023] Open
Abstract
Over the past decade, the catalysis of N-heterocyclic carbenes has achieved significant advances. In this area, aldehydes, enals, and esters, are commonly employed as starting materials through various catalytic activation modes. However, NHC-activated strategy of amide and its derivatives remains elusive. Described herein is the realization of asymmetric desymmetrization of N-Cbz glutarimides with alcohols through an imide C-N bond cleavage under NHC organocatalysis. A structurally diverse set of enantioenriched 4-amido esters is generated with acceptable yields and high enantioselectivities. This method features mild reaction conditions, excellent substrate scope, and excellent atom economy. DFT calculations have been performed to explore the detailed reaction mechanism and the origin of the enantioselectivity, which indicate that the strength of the C-H···O hydrogen bond and C–H⋯π interactions should be responsible for the stereoselectivity. The current strategy could open a door for efficient construction of (R)-Rolipram with excellent stereoselectivity. Desymmetrization of achiral building blocks is one of the most efficient ways to access enantiopure compounds of synthetic relevance. Here, the authors desymmetrize glutarimides with alcohols via an imide C–N bond cleavage under NHC organocatalysis.
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13
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Xu JX, Wang LC, Wu XF. Palladium-Catalyzed Desulfonative Carbonylation of Thiosulfonates: Elimination of SO 2 and Insertion of CO. Org Lett 2022; 24:4820-4824. [PMID: 35739644 DOI: 10.1021/acs.orglett.2c01951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A palladium-catalyzed desulfonative carbonylation of thiosulfonates has been explored. Without any additive, a series of S-aryl/alkyl benzenesulfonothioates were successfully transformed to thioesters in moderate to excellent yields by SO2 extrusion and CO insertion under the pressure of 1 bar of CO. The solvent dimethylacetamide (DMAc) facilitated this desulfonative carbonylation due to its high absorbing ability of SO2.
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Affiliation(s)
- Jian-Xing Xu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023 Dalian, Liaoning, China
| | - Le-Cheng Wang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023 Dalian, Liaoning, China
| | - Xiao-Feng Wu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Science, 116023 Dalian, Liaoning, China.,Leibniz-Institut für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
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14
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Fan T, Song J, Gong L. Asymmetric Redox Allylic Alkylation to Access 3,3′‐Disubstituted Oxindoles Enabled by Ni/NHC Cooperative Catalysis. Angew Chem Int Ed Engl 2022; 61:e202201678. [DOI: 10.1002/anie.202201678] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Indexed: 12/15/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China
| | - Liu‐Zhu Gong
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Hefei 230026 China
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15
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Chakraborty N, Das B, Rajbongshi KK, Patel BK. Combined Power of Organo‐ and Transition Metal Catalysis in Organic Synthesis. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200273] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nikita Chakraborty
- Indian Institute of Technology Guwahati Chemistry Indian Institute of Technology GuwahatiDepartment of ChemistryNorth Guwahati 781039 Guwahati INDIA
| | - Bubul Das
- Indian Institute of Technology Guwahati Chemistry Indian Institute of Technology GuwahatiDepartment of ChemistryNorth Guwahati 781039 Guwahati INDIA
| | - Kamal K. Rajbongshi
- Indian Institute of Technology Guwahati Chemistry Indian Institute of Technology GuwahatiDepartment of ChemistryNorth Guwahati 781039 Guwahati INDIA
| | - Bhisma K Patel
- Indian Institute of Technology Guwahati Chemistry North Guwahati-781 039 781 039 Guwahati INDIA
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16
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Fan T, Song J, Gong L. Asymmetric Redox Allylic Alkylation to Access 3,3′‐Disubstituted Oxindoles Enabled by Ni/NHC Cooperative Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China
| | - Liu‐Zhu Gong
- Department of Chemistry University of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Hefei 230026 China
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17
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Stereodivergent propargylic alkylation of enals via cooperative NHC and copper catalysis. Nat Commun 2022; 13:1344. [PMID: 35292676 PMCID: PMC8924209 DOI: 10.1038/s41467-022-29059-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 02/20/2022] [Indexed: 12/02/2022] Open
Abstract
Despite that asymmetric stereodivergent synthesis has experienced great success to provide unusual processes for the creation of chirality complexity, concepts appliable to asymmetric stereodivergent catalysis are still limited. The dependence on the unusual capacity of each catalyst to precisely control the reactive site planar in the region poses unparalleled constraints on this field. Here, we first demonstrate that the chiral Cu-allenylidene species can participate in the stereodivergent propargylic alkylation of enals, in concert with chiral N-heterocyclic carbenes (NHCs). Thus, all four stereoisomers were obtained with excellent enantioselectivity and diastereoselectivity (up to >99% e.e. and >95:5 d.r.) from the same starting materials by simply altering chiral Cu-Pybox complex and NHC combinations. The rich chemistry workable in the products enables the structurally diverse synthesis of chiral functional molecules and holds great potential in alkaloid synthesis, as showcased by the preparation of the key building block to access (-)-perophoramidine. The ability to construct multiple stereocenters in a modular fashion is an important goal of synthetic organic chemistry. Here the authors present a method to construct oxindoles in four stereoisomers with high enantioselectivity and diastereoselectivity from the same starting materials by using cooperative copper- and organocatalysis.
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18
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Computational investigation on potential energy surface evolution: The tautomerization from enediyne to enyne-allene. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2021.139298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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19
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Dong M, Duan XY, Li Y, Liu B, Qi J. Highly enantioselective δ-protonation and formal [3 + 3] annulation promoted by N-heterocyclic carbene. Org Chem Front 2022. [DOI: 10.1039/d2qo00257d] [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
A chiral NHC catalyst reacts with α,β-γ,δ-diunsaturated aldehydes to generate an extended Breslow intermediate. Upon δ-protonation and tautomerization, the resulting α,β-unsaturated acyl azolium undergoes [3 + 3] annulation with enamines to afford various dihydropyridinones.
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Affiliation(s)
- Mengdie Dong
- 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
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
| | - Yanting Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Binghao Liu
- 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
- 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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20
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Bołt M, Hanek K, Żak P. Metal-free thioesterification of α,β-unsaturated aldehydes with thiols. Org Chem Front 2022. [DOI: 10.1039/d2qo00678b] [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
For the first time, the synthesis of thioesters starting from enals and thiols has been performed in the presence of a bulky N-heterocyclic carbene (NHC) as a catalyst.
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Affiliation(s)
- Małgorzata Bołt
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland
| | - Kamil Hanek
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland
| | - Patrycja Żak
- Department of Organometallic Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 8, 61-614 Poznan, Poland
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21
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Liu W, Zhang L, Liao X, Chen J, Huang Y. An NHC-Catalyzed [3+2] Cyclization of β-Disubstituted Enals with Benzoyl Cyanides. Chem Commun (Camb) 2022; 58:9742-9745. [DOI: 10.1039/d2cc04025e] [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
The NHC-catalyzed asymmetric [3+2] cyclization of benzoyl cyanides to homoenolate generated in-situ from enals was reported. This methodology leads to the efficient construction of a series of chiral cyclic compounds...
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22
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Li YY, Li S, Fan T, Zhang ZJ, Song J, Gong LZ. Enantioselective Formal [4 + 3] Annulations to Access Benzodiazepinones and Benzoxazepinones via NHC/Ir/Urea Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04541] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yang-Yang Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Shuai Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Tao Fan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zi-Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei, 230026, China
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23
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Yamauchi D, Nakamura I, Nishimura T. Iridium-catalyzed enantioselective addition of an N-methyl C-H bond to α-trifluoromethylstyrenes via C-H activation. Chem Commun (Camb) 2021; 57:11787-11790. [PMID: 34676848 DOI: 10.1039/d1cc05076a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Ir-catalyzed enantioselective addition of an N-methyl C-H bond of 2-(methylamino)pyridine derivatives to α-trifluoromethylstyrenes proceeded via C-H activation to give chiral γ-branched amine derivatives having a trifluoromethyl-substituted stereocenter. It was found that a bulky and electron-withdrawing group at the 3-position of 2-(methylamino)pyridines was necessary for the present C-H addition reaction catalyzed by a cationic iridium/chiral bisphosphine complex.
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Affiliation(s)
- Daisuke Yamauchi
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan.
| | - Ikumi Nakamura
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan.
| | - Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan.
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24
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Ma YC, Luo JY, Zhang SC, Lu SH, Du GF, He L. An N-heterocyclic carbene-catalyzed switchable reaction of 9-(trimethylsilyl)fluorene and aldehydes: chemoselective synthesis of dibenzofulvenes and fluorenyl alcohols. Org Biomol Chem 2021; 19:3717-3721. [PMID: 33908559 DOI: 10.1039/d1ob00065a] [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
An N-heterocyclic carbene-catalyzed synthesis of dibenzofulvenes and fluorenyl alcohols was developed. In the presence of 10 mol% NHC (1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) and 4 Å molecular sieves, 9-(trimethylsilyl)fluorene undergoes an olefination reaction with aldehydes to produce dibenzofulvenes in 43-99% yields. However, on reducing the NHC loading to 1 mol% and with the addition of water, 9-(trimethylsilyl)fluorene selectively undergoes nucleophilic addition with aldehydes to afford fluorenyl alcohols in 40-95% yields.
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Affiliation(s)
- Yu-Chuan Ma
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang, Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous Region 832000, People's Republic of China.
| | - Jin-Yun Luo
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang, Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous Region 832000, People's Republic of China.
| | - Shi-Chu Zhang
- College of Sciences, Shihezi University, Xinjiang Uygur Autonomous Region 832000, People's Republic of China
| | - Shu-Hui Lu
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang, Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous Region 832000, People's Republic of China.
| | - Guang-Fen Du
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang, Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous Region 832000, People's Republic of China.
| | - Lin He
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang, Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous Region 832000, People's Republic of China.
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25
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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: 70] [Impact Index Per Article: 23.3] [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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26
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Cao J, Zhu SF. Catalytic Enantioselective Proton Transfer Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200350] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jin Cao
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Shou-Fei Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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27
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Wang F, Tan X, Wu T, Zheng LS, Chen GQ, Zhang X. Ni-Catalyzed asymmetric reduction of α-keto-β-lactams via DKR enabled by proton shuttling. Chem Commun (Camb) 2020; 56:15557-15560. [PMID: 33244528 DOI: 10.1039/d0cc05599a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Chiral α-hydroxy-β-lactams are key fragments of many bioactive compounds and antibiotics, and the development of efficient synthetic methods for these compounds is of great value. The highly enantioselective dynamic kinetic resolution (DKR) of α-keto-β-lactams was realized via a novel proton shuttling strategy. A wide range of α-keto-β-lactams were reduced efficiently and enantioselectively by Ni-catalyzed asymmetric hydrogenation, providing the corresponding α-hydroxy-β-lactam derivatives with high yields and enantioselectivities (up to 92% yield, up to 94% ee). Deuterium-labelling experiments indicate that phenylphosphinic acid plays a pivotal role in the DKR of α-keto-β-lactams by promoting the enolization process. The synthetic potential of this protocol was demonstrated by its application in the synthesis of a key intermediate of Taxol and (+)-epi-Cytoxazone.
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Affiliation(s)
- Fangyuan Wang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
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28
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Zhang Z, Wen Y, Song J, Gong L. Kinetic Resolution of Aziridines Enabled by N‐Heterocyclic Carbene/Copper Cooperative Catalysis: Carbene Dose‐Controlled Chemo‐Switchability. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202013679] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
| | - Yu‐Hua Wen
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS University of Science and Technology of China Hefei 230026 China
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29
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Zhang ZJ, Wen YH, Song J, Gong LZ. Kinetic Resolution of Aziridines Enabled by N-Heterocyclic Carbene/Copper Cooperative Catalysis: Carbene Dose-Controlled Chemo-Switchability. Angew Chem Int Ed Engl 2020; 60:3268-3276. [PMID: 33103824 DOI: 10.1002/anie.202013679] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/24/2020] [Indexed: 02/06/2023]
Abstract
Catalytic kinetic resolution (KR) and dynamic kinetic asymmetric transformation (DyKAT) are alternative and complementary avenues to access chiral stereoisomers of both starting materials and reaction products. The development of highly efficient chiral catalytic systems for kinetically controlled processes has therefore been one of the linchpins in asymmetric synthesis. N-heterocyclic carbene (NHC)/copper cooperative catalysis has enabled highly efficient KR and DyKAT of racemic N-tosylaziridines by [3+3] annulation with isatin-derived enals, leading to highly enantioenriched N-tosylaziridine derivatives (up to >99 % ee) and a large library of spirooxindole derivatives with high structural diversity and stereoselectivity (up to >95:5 d.r., >99 % ee). Mechanistic studies suggest that the NHC can bind reversibly to the copper catalyst without compromising its catalytic activity and regulate the catalytic activity of the copper complex to switch the chemoselection between KR and DyKAT.
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Affiliation(s)
- Zi-Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Hua Wen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, and Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, China
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30
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Ling B, Yang W, Wang YE, Mao J. Cooperative N-Heterocyclic Carbene/Palladium-Catalyzed Umpolung 1,4-Addition of Vinyl Bromides to Enals. Org Lett 2020; 22:9603-9608. [DOI: 10.1021/acs.orglett.0c03654] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bo Ling
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Wenjun Yang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China
| | - Yan-En Wang
- College of Science, Hebei Agricultural University, Baoding 071000, P.R. China
| | - Jianyou Mao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China
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31
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Chen X, Wang H, Jin Z, Chi YR. N
‐Heterocyclic
Carbene Organocatalysis: Activation Modes and Typical Reactive Intermediates. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000107] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xingkuan Chen
- Department of Chemistry, Jinan University Guangzhou Guangdong 510632 China
| | - Hongling 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 Guizhou 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 Guizhou 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 Guizhou 550025 China
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
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32
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Mao Y, Wang Z, Wang G, Zhao R, Kan L, Pan X, Liu L. Redox Deracemization of Tertiary Stereocenters Adjacent to an Electron-Withdrawing Group. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02486] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ying Mao
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Zehua Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Gang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Ran Zhao
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Linglong Kan
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Xiaoguang Pan
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Lei Liu
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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33
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Zhong Y, Xu X, Xing Q, Yang S, Gou J, Gao Z, Yu B. Furfuryl Cation Induced Three-Component Reaction to Synthesize Triazole-Substituted Thioesters. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000299] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ying Zhong
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Song Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology; Changzhou University; 213164 Changzhou China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices; Shaanxi Normal University; 710062 Xi'an China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry; Ministry of Education, School of Chemistry & Chemical Engineering; Shaanxi Normal University; 710062 Xi'an China
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34
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Curti C, Battistini L, Sartori A, Zanardi F. New Developments of the Principle of Vinylogy as Applied to π-Extended Enolate-Type Donor Systems. Chem Rev 2020; 120:2448-2612. [PMID: 32040305 PMCID: PMC7993750 DOI: 10.1021/acs.chemrev.9b00481] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/19/2022]
Abstract
The principle of vinylogy states that the electronic effects of a functional group in a molecule are possibly transmitted to a distal position through interposed conjugated multiple bonds. As an emblematic case, the nucleophilic character of a π-extended enolate-type chain system may be relayed from the legitimate α-site to the vinylogous γ, ε, ..., ω remote carbon sites along the chain, provided that suitable HOMO-raising strategies are adopted to transform the unsaturated pronucleophilic precursors into the reactive polyenolate species. On the other hand, when "unnatural" carbonyl ipso-sites are activated as nucleophiles (umpolung), vinylogation extends the nucleophilic character to "unnatural" β, δ, ... remote sites. Merging the principle of vinylogy with activation modalities and concepts such as iminium ion/enamine organocatalysis, NHC-organocatalysis, cooperative organo/metal catalysis, bifunctional organocatalysis, dicyanoalkylidene activation, and organocascade reactions represents an impressive step forward for all vinylogous transformations. This review article celebrates this evolutionary progress, by collecting, comparing, and critically describing the achievements made over the nine year period 2010-2018, in the generation of vinylogous enolate-type donor substrates and their use in chemical synthesis.
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Affiliation(s)
| | | | | | - Franca Zanardi
- Dipartimento di Scienze degli
Alimenti e del Farmaco, Università
di Parma, Parco Area delle Scienze 27A, 43124 Parma, Italy
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35
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Zhou L, Wu X, Yang X, Mou C, Song R, Yu S, Chai H, Pan L, Jin Z, Chi YR. Gold and Carbene Relay Catalytic Enantioselective Cycloisomerization/Cyclization Reactions of Ynamides and Enals. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910922] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Liejin Zhou
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Xingxing Wu
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Xing Yang
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Chengli Mou
- Guizhou University of Traditional Chinese Medicine Guizhou P. R. China
| | - Runjiang Song
- Division of Chemistry & Biological Chemistry School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Shuyan Yu
- Material and Chemical Engineering College Zhengzhou University of Light Industry Zhengzhou 450001 Henan Province P. R. China
| | - Huifang Chai
- Guizhou University of Traditional Chinese Medicine Guizhou P. R. China
| | - Lutai Pan
- Guizhou University of Traditional Chinese Medicine Guizhou P. R. 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 P. R. 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 P. R. China
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36
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Gold and Carbene Relay Catalytic Enantioselective Cycloisomerization/Cyclization Reactions of Ynamides and Enals. Angew Chem Int Ed Engl 2019; 59:1557-1561. [DOI: 10.1002/anie.201910922] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 10/24/2019] [Indexed: 01/04/2023]
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37
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Diastereodivergent synthesis of enantioenriched α,β-disubstituted γ-butyrolactones via cooperative N-heterocyclic carbene and Ir catalysis. Nat Catal 2019. [DOI: 10.1038/s41929-019-0387-3] [Citation(s) in RCA: 126] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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38
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Poutrel P, Ivanova MV, Pannecoucke X, Jubault P, Poisson T. Copper-Catalyzed Enantioselective Formation of C-CF 3 Centers from β-CF 3 -Substituted Acrylates and Acrylonitriles. Chemistry 2019; 25:15262-15266. [PMID: 31517410 DOI: 10.1002/chem.201904192] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 11/07/2022]
Abstract
The catalytic asymmetric synthesis of β-trifluoromethylated esters or nitriles is reported. The use of an in situ formed chiral Cu-H complex allowed the enantioselective reduction of β-trifluoromethylated acrylates or acrylonitriles. The reaction proceeds smoothly affording the corresponding enantioenriched products in good to excellent yields and outstanding enantioselectivities (up to 98 % ee). The mechanism of the reaction was studied, and a plausible reaction pathway was suggested accordingly. Finally, the versatility of the products was highlighted through functional group manipulations.
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Affiliation(s)
- Pauline Poutrel
- Normandie Univ., INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Maria V Ivanova
- Normandie Univ., INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Xavier Pannecoucke
- Normandie Univ., INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Philippe Jubault
- Normandie Univ., INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Thomas Poisson
- Normandie Univ., INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France.,Institut Universitaire de France, 1 rue Descartes, 75231, Paris, France
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39
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Liu C, Wu S, Xu J, Chen L, Zheng P, Chi YR. Carbene-Catalyzed Enantioselective Addition of Thioamides to Bromoenals for Access to Thiazinone Heterocycles. Org Lett 2019; 21:9493-9496. [PMID: 31742417 DOI: 10.1021/acs.orglett.9b03685] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A carbene-catalyzed reaction between α-bromoenals and thioamides was developed. Key steps include enantioselective 1,4-addition of thioamide sulfur atoms to α,β-unsaturated acyl azolium intermediate. Subsequent intramolecular annulation eventually affords thiazinone heterocycles with high optical purities. The introduction of Lewis acid additives such as Cu(OTf)2 to this NHC catalytic reaction could provide small but consistent improvements to reaction enantioselectivities.
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Affiliation(s)
- Changyi Liu
- 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
| | - Shuquan Wu
- 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
- Guizhou University of Traditional Chinese Medicine , Guiyang 550025 , China.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Lingzhu Chen
- 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
| | - Pengcheng Zheng
- 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
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40
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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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41
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Abstract
In the last ten years, the combination of Lewis acid with N-heterocyclic carbene (NHC) catalysis has emerged as a powerful strategy in a variety of important asymmetric synthesis, due to the ready availability of starting materials, operational simplicity and mild reaction conditions. Recent findings illustrate that Lewis acid could largely enhance the efficiency and enantioselectivity, reverse the diastereoselectivity, and even influence the pathway of the same reaction partners. Herein, this review aims to reveal the recent advances in NHC-Lewis acid synergistically promoted enantioselective reactions for the expeditious assembly of versatile biologically important chiral pharmaceuticals and natural products.
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42
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Zhang Z, Zhang L, Geng R, Song J, Chen X, Gong L. N‐Heterocyclic Carbene/Copper Cooperative Catalysis for the Asymmetric Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2019; 58:12190-12194. [DOI: 10.1002/anie.201907188] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ling Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Rui‐Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Xiao‐Hua Chen
- Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of CAS Hefei, 230026 China
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43
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Zhang Z, Zhang L, Geng R, Song J, Chen X, Gong L. N‐Heterocyclic Carbene/Copper Cooperative Catalysis for the Asymmetric Synthesis of Spirooxindoles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907188] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zi‐Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ling Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Rui‐Long Geng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Jin Song
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Xiao‐Hua Chen
- Shanghai Institute of Materia MedicaChinese Academy of Sciences Shanghai 201203 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Center for Excellence in Molecular Synthesis of CAS Hefei, 230026 China
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44
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Luo N, Liao J, Ouyang L, Wen H, Liu J, Tang W, Luo R. Highly pH-Dependent Chemoselective Transfer Hydrogenation of α,β-Unsaturated Aldehydes in Water. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00353] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nianhua Luo
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China
- School of Chemistry and Environmental Science, Shangrao Normal University, Shangrao, 334001, Jiangxi Province, P. R. China
| | - Jianhua Liao
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China
| | - Lu Ouyang
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China
| | - Huiling Wen
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China
| | - Jitian Liu
- School of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Weiping Tang
- School of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Renshi Luo
- School of Pharmacy, Gannan Medical University, Ganzhou, 341000, Jiangxi Province, P. R. China
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45
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Zhang Y, Ji P, Hu W, Wei Y, Huang H, Wang W. Organocatalytic Transformation of Aldehydes to Thioesters with Visible Light. Chemistry 2019; 25:8225-8228. [DOI: 10.1002/chem.201900932] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Yueteng Zhang
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Peng Ji
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Wenbo Hu
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Yongyi Wei
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - He Huang
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
| | - Wei Wang
- Department of Pharmacology and Toxicology and BIO5 InstituteUniversity of Arizona USA
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46
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Feng ZN, Luo JY, Zhang Y, Du GF, He L. N-Heterocyclic carbene-catalyzed diastereoselective synthesis of sulfenylated indanes via sulfa-Michael-Michael (aldol) cascade reactions. Org Biomol Chem 2019; 17:4700-4704. [PMID: 31020285 DOI: 10.1039/c9ob00210c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
N-Heterocyclic carbene (NHC)-catalyzed diastereoselective synthesis of multisubstituted sulfenylated indanes has been developed. In the presence of 1 mol% NHC, various thiols underwent the sulfa-Michael-Michael cascade reaction with benzenedi(enones) efficiently to form the carbon-sulfur bond and construct sulfenylated indanes in good to excellent yields with high diastereoselectivity. In addition, the NHC-catalyzed sulfa-Michael-aldol cascade reaction between o-formyl chalcone and thiols has also been demonstrated to afford sulfenylated indanes with a free hydroxyl group in moderate yields and good diastereoselectivity.
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Affiliation(s)
- Ze-Nan Feng
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan/School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang Uygur Autonomous Region, 832000, People's Republic of China.
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47
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Wang L, Jiang X, Chen J, Huang Y. Enantio‐ and Diastereoselective Hydrofluorination of Enals by N‐Heterocyclic Carbene Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902989] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Leming Wang
- State Key Laboratory of Chemical OncogenomicsKey Laboratory of Chemical GenomicsPeking UniversityShenzhen Graduate School Shenzhen 518055 China
| | - Xinhang Jiang
- State Key Laboratory of Chemical OncogenomicsKey Laboratory of Chemical GenomicsPeking UniversityShenzhen Graduate School Shenzhen 518055 China
| | - Jiean Chen
- State Key Laboratory of Chemical OncogenomicsKey Laboratory of Chemical GenomicsPeking UniversityShenzhen Graduate School Shenzhen 518055 China
| | - Yong Huang
- State Key Laboratory of Chemical OncogenomicsKey Laboratory of Chemical GenomicsPeking UniversityShenzhen Graduate School Shenzhen 518055 China
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48
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Wang L, Jiang X, Chen J, Huang Y. Enantio- and Diastereoselective Hydrofluorination of Enals by N-Heterocyclic Carbene Catalysis. Angew Chem Int Ed Engl 2019; 58:7410-7414. [PMID: 30942950 DOI: 10.1002/anie.201902989] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/03/2019] [Indexed: 12/16/2022]
Abstract
In contrast to well-established asymmetric hydrogenation reactions, enantioselective protonation is an orthogonal approach for creating highly valuable methine chiral centers under redox-neutral conditions. Reported here is the highly enantio- and diastereoselective hydrofluorination of enals by an asymmetric β-protonation/α-fluorination cascade catalyzed by N-heterocyclic carbenes (NHCs). The two nucleophilic sites of a homoenolate intermediate, generated from enals and an NHC, are sequentially protonated and fluorinated. The results show that controlling the relative rates of protonation, fluorination, and esterification is crucial for this transformation, and can be accomplished using a dual shuttling strategy. Structurally diverse carboxylic acid derivatives with two contiguous chiral centers are prepared in a single step with excellent d.r. and ee values.
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Affiliation(s)
- Leming Wang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
| | - Xinhang Jiang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
| | - Jiean Chen
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
| | - Yong Huang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University, Shenzhen Graduate School, Shenzhen, 518055, China
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49
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Abstract
Enantioselective protonation, delivery of a proton to a carbanion intermediate, is the most straightforward and fundamental method for the preparation of a chiral tertiary carbon stereocenter. Recent efforts for this objective have been realized through enamine catalysis, which has now become a prominent catalytic strategy enabling a range of fascinating chiral transformations. This review will summarize recent advances in the field of enantioselective enamine protonation for the synthesis of optically active carbonyl compounds. Dynamic kinetic resolutions of α-substituted carbonyl compounds through enamine intermediates will be discussed as well.
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Affiliation(s)
- Niankai Fu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
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50
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Wang Q, Liu L, Dong J, Tian Z, Chen T. Metal-free thioesterification of amides generating acyl thioesters. NEW J CHEM 2019. [DOI: 10.1039/c9nj01748h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A base-initiated thioesterification of amides with various thiols is reported. This reaction can take place efficiently under metal-free and air-atmospheric conditions, and provides a facile and practically useful approach to the synthesis of valuable acyl thioesters.
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Affiliation(s)
- Qun Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering, Hunan University
- Changsha 410082
- China
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- China
| | - Jianyu Dong
- Department of Educational Science, Hunan First Normal University
- Changsha 410205
- China
| | - Zhibin Tian
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources
- College of Materials and Chemical Engineering
- Hainan University
- Haikou
- China
| | - Tieqiao Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering, Hunan University
- Changsha 410082
- China
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources
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