1
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He JY, Zhu C, Duan WX, Kong LX, Wang NN, Wang YZ, Fan ZY, Qiao XY, Xu H. Bifunctional Chiral Electrocatalysts Enable Enantioselective α-Alkylation of Aldehydes. Angew Chem Int Ed Engl 2024:e202401355. [PMID: 38967087 DOI: 10.1002/anie.202401355] [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: 01/19/2024] [Revised: 06/25/2024] [Accepted: 07/04/2024] [Indexed: 07/06/2024]
Abstract
Herein, we describe an innovative approach to the asymmetric electrochemical α-alkylation of aldehydes facilitated by a newly designed bifunctional chiral electrocatalyst. The highly efficient bifunctional chiral electrocatalyst combines a chiral aminocatalyst with a redox mediator. It plays a dual role as a redox mediator for electrooxidation, while simultaneously providing remarkable asymmetric induction for the stereoselective α-alkylation of aldehydes. Additionally, this novel catalyst exhibits enhanced catalytic activity and excellent stereoselective control comparable to conventional catalytic systems. As a result, this strategy provides a new avenue for versatile asymmetric electrochemistry. The electrooxidation of diverse phenols enables the C-H/C-H oxidative α-alkylation of aldehydes in a highly chemo- and stereoselective fashion. Detailed mechanistic studies by control experiments and cyclic voltammetry analysis demonstrate possible reaction pathways and the origin of enantio-induction.
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Affiliation(s)
- Jin-Yu He
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Cuiju Zhu
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Wen-Xi Duan
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Ling-Xuan Kong
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Na-Na Wang
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Yan-Zhao Wang
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Zhi-Yong Fan
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Xin-Ying Qiao
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Hao Xu
- Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, State Key Laboratory of Green Pesticide, College of Chemistry, Central China Normal University, Wuhan, 430079, China
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2
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Li LX, Li CR, Guo X, Zhang Z. Photoredox/Copper-Catalyzed One-Pot Aminoalkylation/Cyclization of Alkenes with Primary Amines to Synthesize Polysubstituted γ-Lactams. Org Lett 2024; 26:845-849. [PMID: 38251862 DOI: 10.1021/acs.orglett.3c03974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Visible-light-driven chemical transformation has emerged as a powerful tool for the synthesis of γ-lactams. However, during this transformation, the α-bromoimides need to be pre-prepared. Herein, we report a photoreodox/copper-catalyzed one-pot three-component reaction of alkenes with primary amines for the construction of γ-lactams. In this transformation, the orthoquinones were generated via a photocatalytic pathway, followed by attack by Cu-amido complexes and intramolecular cyclization to give the γ-lactams. This method represents a simple synthetic route displaying broad functional group tolerance, including substrates bearing alcohols, ketones, heterocycles, esters, halides, alkynes, nitriles, ethers, etc.
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Affiliation(s)
- Li-Xin Li
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Zhengzhou 450046, China
| | - Chen-Rui Li
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Xu Guo
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Zhenqiang Zhang
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou 450046, China
- Collaborative Innovation Center of Research and Development on the Whole Industry Chain of Yu-Yao, Zhengzhou 450046, China
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3
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Han Z, Zhu B, Zang Y, Zhang C, Dong XQ, Huang H, Sun J. Primary activation of para-quinone methides by chiral phosphoric acid for enantioselective construction of tetraarylmethanes. Chem Sci 2024; 15:720-725. [PMID: 38179542 PMCID: PMC10763553 DOI: 10.1039/d3sc05014a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 11/21/2023] [Indexed: 01/06/2024] Open
Abstract
Demonstrated here is an asymmetric nucleophilic addition via primary activation of para-quinone methides (p-QMs) based on a chiral phosphoric acid catalytic system. In sharp contrast to previous CPA-based bifunctional activation processes that all required the nucleophiles to have an effective hydrogen bond donor unit (e.g., OH, NH), here no such unit is required in the nucleophile. N-protected indole nucleophiles were successfully utilized for the synthesis of chiral tetraarylmethanes with high efficiency and enantioselectivity under mild conditions. Therefore, this protocol significantly expanded the scope of asymmetric transformations of p-QMs.
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Affiliation(s)
- Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou China
| | - Biao Zhu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou China
| | - Yu Zang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou China
| | - Chaoshen Zhang
- Shenzhen Bay Laboratory Shenzhen 518132 China
- Shenzhen Research Institute, HKUST No. 9 Yuexing 1st Rd Shenzhen 518057 China
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong SAR China
| | - Xiu-Qin Dong
- College of Chemistry and Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University Wuhan Hubei China
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University Changzhou China
- Shenzhen Research Institute, HKUST No. 9 Yuexing 1st Rd Shenzhen 518057 China
- Department of Chemistry, The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong SAR China
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4
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Chen Y, Wang K, Li M, Bao X, Zhao Y, Yi W. One-Step Protocol for the Synthesis of Cyanoacrylates Promoted by Elemental Sulfur from p-Quinone Methides and Cyanoacetates under Basic Conditions. J Org Chem 2023; 88:15696-15707. [PMID: 37906125 DOI: 10.1021/acs.joc.3c01665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Cyanoacrylates have a wide range of biological activities and are extensively applied in production and daily life. Classic synthetic routes to cyanoacrylates have many limitations. Herein, we demonstrate an elemental sulfur-promoted method for the synthesis of β,β-diaryl cyanoacrylates by a tandem 1,6-Michael addition/oxidation/elimination process from p-QMs and cyanoacetates under optimal conditions. The effective protocol has good substrate scopes and yields, and the ratio of inseparable E/Z isomers of cyanoacrylates is also determined by 1HNMR.
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Affiliation(s)
- Yan Chen
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Kunpeng Wang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Mengfan Li
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Xiaoli Bao
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Yunhui Zhao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
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5
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Debnath B, Sarkar T, Karjee P, Purkayastha SK, Guha AK, Punniyamurthy T. Palladium-Catalyzed Annulative Coupling of Spirovinylcyclopropyl Oxindoles with p-Quinone Methides. J Org Chem 2023. [PMID: 37437136 DOI: 10.1021/acs.joc.3c00173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Pd-catalyzed annulative coupling of spirovinylcyclopropyl oxindoles with p-quinone methides has been accomplished via cascade carbon-carbon bond formation to afford bis-spirooxindole scaffolds. The mild reaction conditions, diastereoselectivity, functional group diversity, post-synthetic transformations, and mechanistic studies using DFT calculations are the important practical features.
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Affiliation(s)
- Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tanumay Sarkar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | | | - Ankur K Guha
- Advanced Computational Chemistry Centre, Cotton University, Guwahati 781001, India
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6
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Tang L, Luo Y, Sheng C, Xie F, Zhang W. Cu-Catalyzed Asymmetric Kinetic Boron Conjugate Addition of γ-Substituted α,β-Unsaturated γ-Lactams. Angew Chem Int Ed Engl 2023; 62:e202304640. [PMID: 37070236 DOI: 10.1002/anie.202304640] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 04/15/2023] [Accepted: 04/17/2023] [Indexed: 04/19/2023]
Abstract
Chiral α,β-unsaturated γ-lactams bearing simple γ- substituents are found in biologically active molecules and natural products, however, their synthesis still remains difficult. Herein, we report an efficient kinetic resolution (KR) of γ-substituted α,β-unsaturated γ-lactams via a Cu-catalyzed asymmetric boron conjugate addition, which also leads to the efficient synthesis of chiral β-hydroxy-γ-lactams with β,γ-stereogenic carbon centers. The KR proceeded smoothly with a wide range of γ-alkyl or aryl substituted substrates including those bearing aromatic heterocycles and different N-protected substrates in up to 347 of s value. Their highly versatile transformations, synthetic utility in biologically active molecules, and inhibitory activities against cisplatin-sensitive ovarian cancer cell A2780 have also been demonstrated. Differing from the well-known mechanism involving Cu-B species in Cu-catalyzed boron conjugate additions, our mechanistic studies using density functional theory (DFT) calculations and experiments indicate that a Lewis acid CuI -catalyzed mechanism is the likely pathway in the catalytic reaction.
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Affiliation(s)
- Liang Tang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yicong Luo
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Cheng Sheng
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Fang Xie
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Wanbin Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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7
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Liu S, Chan KL, Lin Z, Sun J. Asymmetric Synthesis of Remotely Chiral Naphthols and Naphthylamines via Naphthoquinone Methides. J Am Chem Soc 2023. [PMID: 37276009 DOI: 10.1021/jacs.3c03557] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Quinone methides are well-established intermediates in asymmetric synthesis. In contrast, their extended analogues with the carbonyl and methide units distributed across two different rings have not been exploited in asymmetric synthesis. Herein, we achieved the first asymmetric process involving such intermediates. Specifically, the use of suitable chiral phosphoric acids enabled in situ generation of 2-naphthoquinone 8-methides and the corresponding aza counterparts for mild one-pot asymmetric nucleophilic addition. These processes provided rapid access to a wide range of previously less accessible remotely chiral naphthols and naphthylamines with both high efficiency and excellent enantioselectivity. Control experiment and DFT calculations provided important insights into the reaction mechanism, which likely involves two phosphoric acid molecules in the enantiodetermining transition states. This work serves as a proof of concept for the exploitation of new types of extended quinone methides as versatile intermediates for asymmetric synthesis, thus providing a new platform for the efficient construction of remote benzylic stereogenic centers of aromatic compounds.
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Affiliation(s)
- Shuxuan Liu
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing 1st Rd, Shenzhen 518057, China
- Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Ka Lok Chan
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Zhenyang Lin
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Jianwei Sun
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing 1st Rd, Shenzhen 518057, China
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8
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Gond KK, Maddani MR. Addition of sulfonylphthalides to para-quinone methides: Selective 1,6-additions and oxidative annulations. Org Biomol Chem 2023; 21:2504-2508. [PMID: 36897072 DOI: 10.1039/d2ob02134j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
KOtBu mediated addition of sulfonylphthalides to p-quinone methides led to the selective synthesis of isochroman-1,4-diones and addition products. Interestingly, isochroman-1,4-diones were obtained via an unprecedented oxidative annulation pathway. The present work highlights a wide variety of substrates, good yields, shorter reaction time and ambient reaction conditions. Furthermore, a few addition products were transformed into functionalized heterocyclic molecules. Additionally, the scale-up experiment suggests the practical feasibility of preparing isochroman-1,4-diones in higher-scale reactions.
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Affiliation(s)
- Kavyashree Kuppayya Gond
- Department of Post-Graduate Studies and Research in Chemistry, Mangalore University, Mangalagangothri-574199, India.
| | - Mahagundappa Rachappa Maddani
- Department of Post-Graduate Studies and Research in Chemistry, Mangalore University, Mangalagangothri-574199, India.
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9
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Roh B, Farah AO, Kim B, Feoktistova T, Moeller F, Kim KD, Cheong PHY, Lee HG. Stereospecific Acylative Suzuki–Miyaura Cross-Coupling: General Access to Optically Active α-Aryl Carbonyl Compounds. J Am Chem Soc 2023; 145:7075-7083. [PMID: 37016901 DOI: 10.1021/jacs.3c00637] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
A novel strategy for the stereospecific Pd-catalyzed acylative cross-coupling of enantiomerically enriched alkylboron compounds has been developed. The protocol features an extremely high level of enantiospecificity to allow facile access to synthetically challenging and valuable chiral ketones and carboxylic acid derivatives. The use of a sterically encumbered and electron-rich phosphine ligand proved to be crucial for the success of the reaction. Furthermore, on the basis of experimental and computational studies, a unique mechanism for the transmetalation, assisted by the noncovalent interactions of the C(sp3)-based organoboron reagent, has been identified.
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Affiliation(s)
- Byeongdo Roh
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Abdikani Omar Farah
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331-2145, United States
| | - Beomsu Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Taisiia Feoktistova
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331-2145, United States
| | - Finn Moeller
- Department of Chemistry, Johannes Gutenberg University Mainz, 55128 Mainz, Germany
| | - Kyeong Do Kim
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331-2145, United States
| | - Hong Geun Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
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10
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Ali K, Panda G. Transition-Metal-Free Multicomponent Approach to the Regioselective Synthesis of Highly Substituted N-Alkylpyrazoles. Chem Asian J 2023; 18:e202201129. [PMID: 36585904 DOI: 10.1002/asia.202201129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 01/01/2023]
Abstract
An efficient transition-metal-free multicomponent approach to the regioselective synthesis of highly substituted N-alkylpyrazoles through 1,6-addition of pyrazole (in situ generated from α,β-unsaturated aldehyde and hydrazide) to para-Quinone Methides has been developed. The N-alkylpyrazole containing triarylmethanes having several heteroaryl rings (quinoline, pyridine, thiophene) at the central methine carbon atom was developed. This chemical process may be used for large-scale synthesis and provides a novel way to produce triarylmethanes with diverse functional groups.
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Affiliation(s)
- Kasim Ali
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Gautam Panda
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
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11
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Azeem Z, Mandal PK. Atom-Economic Synthesis of Unsymmetrical gem-Diarylmethylthio/Seleno Glycosides via Base Mediated C(O)-S/Se Bond Cleavage and Acyl Transfer Approach of Glycosylthio/Selenoacetates. J Org Chem 2023; 88:1695-1712. [PMID: 36633914 DOI: 10.1021/acs.joc.2c02704] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Herein, we invented the Cs2CO3-mediated atom economic method that streamlines the scission of the C(O)-S/Se bond involving the in situ generation of an anomeric thiolate/selenolate anion, which reacted with p-QMs to yield novel unsymmetrical gem-diarylmethylthio/seleno glycosides while retaining the anomeric stereochemistry. Notably, the key features of this protocol involve unprecedented long-range acyl transfer (from S/Se to O), thus affording acylation of the final product which is not yet reported by classical methods. This straightforward protocol offers a mild, short reaction time, synthetically simple approach, and compatibility with 8 types of sugar along with phenylthio/benzylseleno esters.
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Affiliation(s)
- Zanjila Azeem
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Pintu Kumar Mandal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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12
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Xiong B, Si L, Zhu L, Wu R, Liu Y, Xu W, Zhang F, Tang KW, Wong WY. Room-Temperature ZnBr 2 -Catalyzed Regioselective 1,6-Hydroarylation of Electron-Rich Arenes to para-Quinone Methides: Synthesis of Unsymmetrical Triarylmethanes. Chem Asian J 2023; 18:e202201156. [PMID: 36507597 DOI: 10.1002/asia.202201156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/10/2022] [Accepted: 12/12/2022] [Indexed: 12/14/2022]
Abstract
A mild and efficient Zn(II)-catalyzed regioselective 1,6-hydroarylation of para-quinone methides (p-QMs) with electron-rich arenes protocol is reported. A variety of electron-rich arenes and para-quinone methides are well tolerated under mild conditions, delivering a broad range of triarylmethanes in good to excellent yields. The present method also works well for the hydroarylation of p-QMs with other nucleophiles, such as aniline, indole and phenol derivatives, offering the corresponding triarylmethanes with good yields under the standard conditions. The possible mechanism for the formation of C(sp3 )-C(sp2 ) bonds in hydroarylation reactions has been explored by step-by-step control experiments, and the reaction may follow a second-order manner in a chemical kinetic study.
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Affiliation(s)
- Biquan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China.,Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
| | - Lulu Si
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Longzhi Zhu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China.,Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
| | - Rong Wu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Weifeng Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Fan Zhang
- College of Chemistry and Chemical Engineering, Jishou University, 416000, Jishou, P. R. China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
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13
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Zhou Y, Hu D, Zhang Y, Cen Q, Dong ZB, Zhang JQ, Ren H. Transition-Metal-Free Synthesis of Polyfluoro-Polyarylmethanes via Direct Cross-Coupling of Polyfluoroarenes and Benzyl Chlorides. Chemistry 2022; 29:e202203427. [PMID: 36583527 DOI: 10.1002/chem.202203427] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/17/2022] [Accepted: 12/30/2022] [Indexed: 12/31/2022]
Abstract
The transition-metal-free direct cross-coupling between polyfluoroarenes and benzyl chlorides is reported. In this strategy, a variety of polyfluoro di-, tri- and tetra-arylmethanes was efficiently prepared with good to excellent yields in the presence of Mg turnings via a one-pot procedure. Significantly, this method provides a general approach for the synthesis of polyfluorinated polyarylmethanes.
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Affiliation(s)
- Yu Zhou
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, P. R. China.,School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
| | - Dandan Hu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, P. R. China
| | - Yuting Zhang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, P. R. China
| | - Qiyou Cen
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, P. R. China
| | - Zhi-Bing Dong
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China
| | - Jun-Qi Zhang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, P. R. China
| | - Hongjun Ren
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, 318000, P. R. China.,School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453000, P. R. China
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14
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Li P, Ma Y, Wang K, Shi X, Yang J, Liu G. Design, synthesis and antitumor activity of potent and safe para-quinone methides derivatives in vitro and in vivo. Biomed Pharmacother 2022; 156:113893. [DOI: 10.1016/j.biopha.2022.113893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/07/2022] [Accepted: 10/17/2022] [Indexed: 11/02/2022] Open
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15
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Chen S, Wen W, Zhao X, Zhang Z, Li W, Zhang Y, Li B, Zhu L. Preparation of Chitosan-Composite-Film-Supported Copper Nanoparticles and Their Application in 1,6-Hydroboration Reactions of p-Quinone Methides. Molecules 2022; 27:molecules27227962. [PMID: 36432064 PMCID: PMC9695593 DOI: 10.3390/molecules27227962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/10/2022] [Accepted: 11/15/2022] [Indexed: 11/19/2022] Open
Abstract
Here, we describe the preparation of copper nanoparticles that are stabilized on a chitosan composite film (CP@Cu). This material could catalyze the 1,6-hydroboration reactions of p-quinone methides with B2pin2 as a boron source under mild conditions. This reaction exhibited very good functional group compatibility, and the organoboron compounds that were formed could easily be converted into corresponding hydroxyl products with good to excellent yields. This newly developed methodology provides an efficient and sequential pathway for the synthesis of gem-disubstituted methanols.
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Affiliation(s)
- Shuhan Chen
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Wei Wen
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Xue Zhao
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Zelang Zhang
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Weishuang Li
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- Correspondence: (W.L.); (B.L.); (L.Z.)
| | - Yaoyao Zhang
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
| | - Bojie Li
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- Correspondence: (W.L.); (B.L.); (L.Z.)
| | - Lei Zhu
- School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
- Correspondence: (W.L.); (B.L.); (L.Z.)
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16
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Cui M, Zhao ZY, Oestreich M. Boosting the Enantioselectivity of Conjugate Borylation of α,β-Disubstituted Cyclobutenones with Monooxides of Chiral C 2 -Symmetric Bis(phosphine) Ligands. Chemistry 2022; 28:e202202163. [PMID: 35816363 DOI: 10.1002/chem.202202163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 01/07/2023]
Abstract
Chiral bis(phosphine) monooxides (BPMOs) derived from C2 -symmetric bis(phosphines) have been found to induce superior levels of enantioselection in copper-catalyzed conjugate borylation of α,β-disubstituted cyclobutenones. More precisely, enantiomeric excesses as well as chemical yields are exceedingly high with (R,R)-Bozphos as the chiral ligand while these values are low with parent (R,R)-Me-Duphos. A similar yet less pronounced effect was seen in the corresponding 1,6-addition to para-quinone methides.
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Affiliation(s)
- Ming Cui
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Zhi-Yuan Zhao
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
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17
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Zhang Z, Tan X, Sui A, Zhang B, Zhang Y. DBU-catalyzed 1,6-addition of quinazolinones and quinolones to para‑quinone methides. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154185] [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]
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18
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Zurro M, Ge L, Harutyunyan SR. Catalytic Access to 4-(sec-Alkyl)Anilines via 1,6-Conjugate Addition of Grignard Reagents to in Situ Generated aza- p-Quinone Methides. Org Lett 2022; 24:6686-6691. [PMID: 36053069 PMCID: PMC9486948 DOI: 10.1021/acs.orglett.2c02786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The synthesis of aniline derivatives, common building
blocks in
many pharmaceuticals, agrochemicals, dyes or polymers, has been limited
to reactions based on benzene-toluene-xylene derivatives (BTX) due
to their ample availability. Despite the large number of existing
methodologies, the synthesis of chiral 4-(sec-alkyl)anilines has not
been accomplished so far. In this work, a tandem strategy based on
the generation of a reactive aza-p-quinone methide
(aza-p-QM) intermediate followed by Cu(I)-catalyzed
addition of Grignard reagents has been developed.
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Affiliation(s)
- Mercedes Zurro
- Stratingh Institute for Chemistry University of Groningen Institution Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Luo Ge
- Stratingh Institute for Chemistry University of Groningen Institution Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Syuzanna R Harutyunyan
- Stratingh Institute for Chemistry University of Groningen Institution Nijenborgh 4, 9747 AG, Groningen, The Netherlands
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19
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Han Z, Zang Y, Liu C, Guo W, Huang H, Sun J. Enantioselective synthesis of triarylmethanes via organocatalytic transfer hydrogenation of para-quinone methides. Chem Commun (Camb) 2022; 58:7128-7131. [PMID: 35667384 DOI: 10.1039/d2cc01996e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new organocatalytic asymmetric method for the synthesis of enantioenriched triarylmethanes is developed. Different from the conventional approaches featuring asymmetric arylation, the present study employs asymmetric reduction via C-H bond formation as the key step. This approach does not require the presence of a heteroaryl ring or the presynthesis of unstable para-quinone methides. Instead, the stable racemic triarylmethanols were used as substrates for the in situ generation of the intermediates with a suitable chiral phosphoric acid catalyst.
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Affiliation(s)
- Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Yu Zang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Chang Liu
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR, China 710119, P. R. China.
| | - Wengang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China. .,Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR, China 710119, P. R. China. .,Shenzhen Research Institute, HKUST, No. 9 Yuexing 1st Rd, Shenzhen 518057, China
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20
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Copper(II)-Catalyzed 1,6-Hydroboration Reactions of p‑Quinone Methides Under Ligand-Free Conditions: A Sequential Methodology to gem-Disubstituted Methanols. Catal Letters 2022. [DOI: 10.1007/s10562-022-04063-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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21
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Li J, Wang K, Wu J, Zhang H, Chen Y, Liu Q, Xu J, Yi W. Elemental Sulfur‐Promoted Synthesis of 4‐Hydroxybenzophenones from
p
‐Quinone Methides under Metal‐Free Condition. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jingping Li
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Kunpeng Wang
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Jiayi Wu
- Shanghai Ganquan Foreign Languages Middle School 200065 Shanghai P. R. China
| | - Haoxiang Zhang
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Yan Chen
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Qinglei Liu
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
| | - Junju Xu
- College of Tabacco Science Yunnan Agricultural University Key Laboratory of Sustainable Utilization of Plateau Characteristic Spice Plant Resources Education Department of Yunnan Province 650201 Kunming P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology Shanghai Institute of Technology 201418 Shanghai P. R. China
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22
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Fujita H, Sasamoto O, Kobayashi S, Kitamura M, Kunishima M. Synthesis and characterization of tetraphenylammonium salts. Nat Commun 2022; 13:2537. [PMID: 35534487 PMCID: PMC9085870 DOI: 10.1038/s41467-022-30282-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 04/20/2022] [Indexed: 11/15/2022] Open
Abstract
The phenyl (Ph) group is a representative substituent in the field of organic chemistry as benzene (the parent molecule) is of fundamental importance. Simple Ph-substituted compounds of common chemical elements are well known. However, extensive structural characterization of tetraphenylammonium (Ph4N+) salts has not been reported. Herein, the synthesis of Ph4N+ salts and their characterization data including the 1H and 13C nuclear magnetic resonance (NMR) spectra and the single-crystal X-ray structure have been presented. An intermolecular radical coupling reaction between an aryl radical and a triarylammoniumyl radical cation was conducted to synthesize the target moieties. The Ph4N+ salts described herein are the simplest tetraarylammonium (Ar4N+) salts known. The results reported herein can potentially help access the otherwise inaccessible non-bridged Ar4N+ salts, a new class of rigid and sterically hindered organic cations. Tetraphenylammonium (Ph4N+) salts remain synthetically inaccessible despite their simple chemical structure. Here, the authors have synthesized Ph4N+ salts and provided characterization including a single-crystal X-ray structure.
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23
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Burra AG, Uredi D, Motati DR, Fronczek FR, Watkins EB. Remote Functionalization of 8‐Substituted Quinolines with para‐Quinone Methides: Access to Unsymmetrical Tri(hetero)arylmethanes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | | | - E. Blake Watkins
- Union University Pharmaceutical Sciences 1050 Union University Drive 38305 Jackson UNITED STATES
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24
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Roy D, Anas M, Manhas A, Saha S, Kumar N, Panda G. Synthesis, biological evaluation, Structure − Activity relationship studies of quinoline-imidazole derivatives as potent antimalarial agents. Bioorg Chem 2022; 121:105671. [DOI: 10.1016/j.bioorg.2022.105671] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/24/2022] [Accepted: 02/07/2022] [Indexed: 12/22/2022]
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25
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Lin H, Jiao W, Chen Z, Han J, Fang D, Wang M, Liao J. Enantioselective Cu-Catalyzed Nucleophilic Addition of Fluorinated Reagents: C–C Bond Formation for the Synthesis of Chiral Vicinal Difluorides. Org Lett 2022; 24:2197-2202. [DOI: 10.1021/acs.orglett.2c00518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Huaxin Lin
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Jiao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiwei Chen
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Han
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Dongmei Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Min Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Liao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
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26
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Rai V, P K, Harmalkar SS, Dhuri SN, Maddani MR. 1,6-Addition of 1,2,3-NH triazoles to para-quinone methides: Facile access to highly selective N 1 and N 2 substituted triazoles. Org Biomol Chem 2022; 20:345-351. [PMID: 34908078 DOI: 10.1039/d1ob01717a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The regioselective syntheses of N1 and N2 substituted triazoles through a 1,6-addition reaction of 1,2,3-NH triazoles to p-quinone methide were achieved under mild reaction conditions. The present reactions showed superior results in terms of selectivity, mild reaction conditions, short reaction time and broad substrate scope with good functional-group compatibility. Considering the high synthetic value of N1- and N2-substituted compounds and p-QM related research, the present strategy will greatly benefit researchers in various fields.
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Affiliation(s)
- Vishakha Rai
- Department of Chemistry, Mangalore University, Mangalagangothri, Mangalore, Karnataka, India.
| | - Kavyashree P
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, India
| | | | - Sundar N Dhuri
- School of Chemical Sciences, Goa University, Goa 403206, India
| | - Mahagundappa R Maddani
- Department of Chemistry, Mangalore University, Mangalagangothri, Mangalore, Karnataka, India.
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27
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Kumar J, Ahmed A, Kumar S, Raheem S, Rizvi MA, Shah BA. Visible light-mediated synthesis of α-alkoxy/hydroxy diarylacetaldehydes from terminal alkynes. NEW J CHEM 2022. [DOI: 10.1039/d2nj01614a] [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 visible light-mediated approach enabling the use of alcohols as nucleophiles in a one-step synthesis of α-alkoxy/hydroxy diarylacetaldehydes is reported.
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Affiliation(s)
- Jaswant Kumar
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India
| | - Ajaz Ahmed
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India
| | - Sourav Kumar
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India
| | - Shabnam Raheem
- Department of Chemistry, University of Kashmir, Srinagar, 190006, India
| | | | - Bhahwal Ali Shah
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, 201002, India
- Natural Product & Medicinal Chemistry, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India
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28
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Wu Y, Shen P, Duan W, Ma Y. Asymmetric Boration of para-Quinone Methides Catalyzed by N-Heterocyclic Carbene. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202111041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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29
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Kang H, Li CJ. Ruthenium(ii)-catalyzed regioselective 1,6-conjugate addition of umpolung aldehydes as carbanion equivalents. Chem Sci 2022; 13:118-122. [PMID: 35059159 PMCID: PMC8694324 DOI: 10.1039/d1sc03732c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 11/27/2021] [Indexed: 12/17/2022] Open
Abstract
Highly regioselective 1,6-conjugate addition was developed using hydrazone as carbanion equivalent catalyzed by ruthenium under mild conditions.
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Affiliation(s)
- Hyotaik Kang
- Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montréal, Québec, H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. W., Montréal, Québec, H3A 0B8, Canada
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30
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Wang Y, Wang CJ, Feng QZ, Zhai JJ, Qi S, Zhong AG, Chu M, Xu DQ. Copper-catalyzed asymmetric 1,6-conjugate addition of in situ generated para-quinone methides with β-ketoesters. Chem Commun (Camb) 2022; 58:6653-6656. [DOI: 10.1039/d2cc00146b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Cu-catalyzed asymmetric 1,6-conjugate addition of in situ generated para-quinone methides (p-QMs) with β-ketoester has been developed to construct the ketoester skeleton bearing adjacent tertiary-quaternary carbon stereocenter in good yields...
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31
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Pan HP, Zhu ZQ, Qiu ZW, Liu HF, Ma JD, Li BQ, Feng N, Ma AJ, Peng JB, Zhang XZ. Dearomatization of 2,3-Disubstituted Indoles via 1,8-Addition of Propargylic (Aza)- para-Quinone Methides. J Org Chem 2021; 86:16518-16534. [PMID: 34714074 DOI: 10.1021/acs.joc.1c01857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Dearomatization of indole is a useful strategy to access indolimines: a motif widely exists in biologically active molecules and natural products. Herein, an efficient method for the dearomatization of 2,3-disubstituted indoles to generate diverse indolimines with tetrasubstituted allenes is described. This work accomplishes dearomatization of 2,3-disubstituted indoles through 1,8-addition of (aza)-para-quinone methides, which are generated in situ from propargylic alcohols. A series of synthetically useful indolimines containing quaternary carbon centers and tetrasubstituted allenes can be accessed in good yields (up to 99%). Additionally, the separability of product isomers, diversified product transformations, and easy scale-up of the reaction demonstrate the potential application of this method.
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Affiliation(s)
- Han-Peng Pan
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Zhi-Qiang Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Zong-Wang Qiu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Hong-Fu Liu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Jiong-Dong Ma
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Bao Qiong Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Na Feng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Ai-Jun Ma
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Jin-Bao Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Xiang-Zhi Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
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32
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Chen Z, Lin H, Han J, Fang D, Wang M, Liao J. Enantioselective Copper-Catalyzed Electrophilic Sulfenylation of Cyclic Imino Esters. Org Lett 2021; 23:9146-9150. [PMID: 34787420 DOI: 10.1021/acs.orglett.1c03464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein we report an enantioselective sulfenylation of cyclic imino esters with the efficient and versatile sulfenylation reagent S-alkyl 4-methylbenzenesulfonothioates. By utilizing the Cu/tBu-Phosferrox catalytic system, we can assemble diverse S-alkyl groups into the cyclic imino esters under mild conditions in good yields and with excellent enantioselectivities. Remarkably, this method demonstrates a high tolerance of diverse functional groups and proves to be applicable in the late-stage functionalization of pharmaceuticals.
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Affiliation(s)
- Zhiwei Chen
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huaxin Lin
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Han
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Dongmei Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Min Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jian Liao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,College of Chemical Engineering, Sichuan University, Chengdu 610065, China
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33
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Pati S, Rayi S, Namboothiri INN. Stereoselective Synthesis of Tri- and Tetrasubstituted Olefins via 1,6-Additions of Diazo Compounds and Their Precursors to p-Quinone Methides. ACS ORGANIC & INORGANIC AU 2021; 1:51-59. [PMID: 36855755 PMCID: PMC9954373 DOI: 10.1021/acsorginorgau.1c00012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Reactions of para-quinone methides (p-QMs) with α-diazo-β-ketosulfones and their corresponding esters as well as simple β-dicarbonyl compounds and β-ketosulfones have been carried out under basic conditions. While the reaction of diazosulfone with p-QMs afforded trisubstituted olefins via deacylative 1,6-addition and elimination, α-diazo-β-ketoesters and various active methylene compounds such as 1,3-dicarbonyls and β-ketosulfones afforded tetrasubstituted olefins via 1,6-addition and aerial oxidation. These simple, environmentally benign, and mechanistically diverse protocols provided the products in moderate to excellent yields and selectivities.
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34
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Chen Y, Yu Z, Jiang Z, Tan JP, Wu JH, Lan Y, Ren X, Wang T. Asymmetric Construction of Tertiary/Secondary Carbon–Phosphorus Bonds via Bifunctional Phosphonium Salt Catalyzed 1,6-Addition. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03149] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People’s Republic of China
| | - Zhaoyuan Yu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Zhiyu Jiang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People’s Republic of China
| | - Jian-Ping Tan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People’s Republic of China
| | - Jia-Hong Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People’s Republic of China
| | - Yu Lan
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, People’s Republic of China
| | - Xiaoyu Ren
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People’s Republic of China
| | - Tianli Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People’s Republic of China
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35
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Dong T, Wei P, Li M, Gao F, Qin Y. Highly Diastereoselective Synthesis of Tetrahydroquinoline Derivatives via [4 + 2] Annulation of Ortho-Tosylaminophenyl-Substituted Para-Quinone Methides and Cyanoalkenes. Front Chem 2021; 9:764866. [PMID: 34805095 PMCID: PMC8595915 DOI: 10.3389/fchem.2021.764866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/19/2021] [Indexed: 11/13/2022] Open
Abstract
As a privileged structural motif, tetrahydroquinoline skeletons widely exist in biologically active natural products and pharmaceuticals. In this protocol, a highly diastereoselective [4 + 2] annulation of ortho-tosylaminophenyl-substituted p-QMs and cyanoalkenes to construct tetrahydroquinoline derivatives has been successfully achieved. This strategy proceeds efficiently under mild condition, offering straightforward route to a variety of 4-aryl-substituted tetrahydroquinolines with high yields, excellent diastereoselectivities, broad functional group tolerance as well as gram-scale capacity. Moreover, a one-pot reaction sequence utilizing in situ generated p-QMs under the similar condition to build tetrahydroquinoline framework is smoothly conducted with good reaction performance as well as step and atom economy.
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Affiliation(s)
- Taiwei Dong
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Peifeng Wei
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Min Li
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Feng Gao
- College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yuan Qin
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases, Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, China
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36
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Zhao YT, Su YX, Li XY, Yang LL, Huang MY, Zhu SF. Dirhodium-Catalyzed Enantioselective B-H Bond Insertion of gem-Diaryl Carbenes: Efficient Access to gem-Diarylmethine Boranes. Angew Chem Int Ed Engl 2021; 60:24214-24219. [PMID: 34476881 DOI: 10.1002/anie.202109447] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/20/2021] [Indexed: 01/29/2023]
Abstract
The scarcity of reliable methods for synthesizing chiral gem-diarylmethine borons limits their applications. Herein, we report a method for highly enantioselective dirhodium-catalyzed B-H bond insertion reactions with diaryl diazomethanes as carbene precursors. These reactions afforded chiral gem-diarylmethine borane compounds in high yield (up to 99 % yield), high activity (turnover numbers up to 14 300), high enantioselectivity (up to 99 % ee) and showed unprecedented broad functional group tolerance. The borane compounds synthesized by this method could be efficiently transformed into diaryl methanol, diaryl methyl amine, and triaryl methane derivatives with good stereospecificity. Mechanistic studies suggested that the borane adduct coordinated to the rhodium catalyst and thus interfered with decomposition of the diazomethane, and that insertion of a rhodium carbene (generated from the diaryl diazomethane) into the B-H bond was most likely the rate-determining step.
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Affiliation(s)
- Yu-Tao Zhao
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yu-Xuan Su
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xiao-Yu Li
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Liang-Liang Yang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Ming-Yao Huang
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Shou-Fei Zhu
- Frontiers Science Center for New Organic Matter, State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
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37
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Hu J, Ferger M, Shi Z, Marder TB. Recent advances in asymmetric borylation by transition metal catalysis. Chem Soc Rev 2021; 50:13129-13188. [PMID: 34709239 DOI: 10.1039/d0cs00843e] [Citation(s) in RCA: 93] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral organoboronates have played a critical role in organic chemistry and in the development of materials science and pharmaceuticals. Much effort has been devoted to exploring synthetic methodologies for the preparation of these compounds during the past few decades. Among the known methods, asymmetric catalysis has emerged as a practical and highly efficient strategy for their straightforward preparation, and recent years have witnessed remarkable advances in this respect. Approaches such as asymmetric borylative addition, asymmetric allylic borylation and stereospecific cross-coupling borylation, have been extensively explored and well established employing transition-metal catalysis with a chiral ligand. This review provides a comprehensive overview of transition metal-catalysed asymmetric borylation processes to construct carbon-boron, carbon-carbon, and other carbon-heteroatom bonds. It summarises a range of recent achievements in this area of research, with considerable attention devoted to the reaction modes and the mechanisms involved.
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Affiliation(s)
- Jiefeng Hu
- Institute of Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. .,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 211816 Nanjing, China
| | - Matthias Ferger
- Institute of Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210093 Nanjing, China.
| | - Todd B Marder
- Institute of Inorganic Chemistry, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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38
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Zhao Y, Su Y, Li X, Yang L, Huang M, Zhu S. Dirhodium‐Catalyzed Enantioselective B−H Bond Insertion of
gem
‐Diaryl Carbenes: Efficient Access to
gem
‐Diarylmethine Boranes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yu‐Tao Zhao
- Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Yu‐Xuan Su
- Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Xiao‐Yu Li
- Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Liang‐Liang Yang
- Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Ming‐Yao Huang
- Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Shou‐Fei Zhu
- Frontiers Science Center for New Organic Matter State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
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39
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Zhu Y, Wang H, Wang G, Wang Z, Liu Z, Liu L. Enantioselective Construction of Single and Vicinal All-Carbon Quaternary Stereocenters through Ion-Pair-Catalyzed 1,6-Conjugate Addition. Org Lett 2021; 23:7248-7253. [PMID: 34460272 DOI: 10.1021/acs.orglett.1c02640] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An asymmetric 1,6-conjugate addition to presynthesized δ-aryl-δ-cyano-disubstituted para-quinone methides through bifunctional phosphonium-amide-promoted ion-pair catalysis for acyclic all-carbon quaternary stereocenter construction has been described. Both acyclic and cyclic 1,3-dicarbonyls participate in the asymmetric alkylation reaction, furnishing a wide array of diarylmethanes bearing a single acyclic quaternary carbon stereocenter or vicinal cyclic and acyclic quaternary carbon stereocenters with high efficiency and excellent stereoselectivity. Computational studies elucidate the origin of the enantioselectivity.
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Affiliation(s)
- Yasheng Zhu
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
| | - Hongliang 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
| | - Zehua Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Zhaopeng Liu
- 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.,Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
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40
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Li Z, Li Y, Li X, Wu M, He ML, Sun J. Organocatalytic asymmetric formal oxidative coupling for the construction of all-aryl quaternary stereocenters. Chem Sci 2021; 12:11793-11798. [PMID: 34659717 PMCID: PMC8442720 DOI: 10.1039/d1sc03324g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 07/29/2021] [Indexed: 12/15/2022] Open
Abstract
A new catalytic asymmetric formal cross dehydrogenative coupling process for the construction of all-aryl quaternary stereocenters is disclosed, which provides access to rarely explored chiral tetraarylmethanes with excellent enantioselectivity. The suitable oxidation conditions and the hydrogen-bond-based organocatalysis have enabled efficient intermolecular C–C bond formation in an overwhelmingly crowded environment under mild conditions. para-Quinone methides bearing an ortho-directing group serve as the key intermediate. The precise loading of DDQ is critical to the high enantioselectivity. The chiral products have also been demonstrated as promising antiviral agents. A one-pot oxidation of racemic triarylmethanes to form para-quinone methides followed by enantioselective construction of all-aryl quaternary stereocenters has been developed.![]()
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Affiliation(s)
- Zhiyang Li
- Department of Chemistry, The Hong Kong University of Science and Technology (HKUST) Clear Water Bay Kowloon Hong Kong SAR China .,Shenzhen Bay Laboratory Shenzhen 518107 China
| | - Yichen Li
- Department of Biomedical Sciences, City University of Hong Kong Kowloon Hong Kong SAR China
| | - Xingguang Li
- Department of Chemistry, The Hong Kong University of Science and Technology (HKUST) Clear Water Bay Kowloon Hong Kong SAR China .,Shenzhen Research Institute, HKUST No. 9 Yuexing 1st Rd Shenzhen 518057 China
| | - Mandi Wu
- Department of Biomedical Sciences, City University of Hong Kong Kowloon Hong Kong SAR China
| | - Ming-Liang He
- Department of Biomedical Sciences, City University of Hong Kong Kowloon Hong Kong SAR China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology (HKUST) Clear Water Bay Kowloon Hong Kong SAR China .,Shenzhen Bay Laboratory Shenzhen 518107 China.,Shenzhen Research Institute, HKUST No. 9 Yuexing 1st Rd Shenzhen 518057 China
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41
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Enantioselective 1,6‐Conjugate Addition of Dialkyl α‐Diazo Methylphosphonate to
para
‐Quinone Methides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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42
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Wei B, Ren Q, Bein T, Knochel P. Transition-Metal-Free Synthesis of Polyfunctional Triarylmethanes and 1,1-Diarylalkanes by Sequential Cross-Coupling of Benzal Diacetates with Organozinc Reagents. Angew Chem Int Ed Engl 2021; 60:10409-10414. [PMID: 33625773 PMCID: PMC8252654 DOI: 10.1002/anie.202101682] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Indexed: 12/02/2022]
Abstract
A variety of functionalized triarylmethane and 1,1-diarylalkane derivatives were prepared via a transition-metal-free, one-pot and two-step procedure, involving the reaction of various benzal diacetates with organozinc reagents. A sequential cross-coupling is enabled by changing the solvent from THF to toluene, and a two-step SN 1-type mechanism was proposed and evidenced by experimental studies. The synthetic utility of the method is further demonstrated by the synthesis of several biologically relevant molecules, such as an anti-tuberculosis agent, an anti-breast cancer agent, a precursor of a sphingosine-1-phosphate (S1P) receptor modulator, and a FLAP inhibitor.
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Affiliation(s)
- Baosheng Wei
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Qianyi Ren
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Thomas Bein
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Paul Knochel
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
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43
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Shi C, Eun J, Newhouse TR, Yin L. Copper(I)‐Catalyzed Asymmetric Conjugate 1,6‐, 1,8‐, and 1,10‐Borylation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016081] [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)
- Chang‐Yun Shi
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Jungmin Eun
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520-8105 USA
| | - Timothy R. Newhouse
- Department of Chemistry Yale University 225 Prospect Street New Haven CT 06520-8105 USA
| | - Liang Yin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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44
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Shi CY, Eun J, Newhouse TR, Yin L. Copper(I)-Catalyzed Asymmetric Conjugate 1,6-, 1,8-, and 1,10-Borylation. Angew Chem Int Ed Engl 2021; 60:9493-9499. [PMID: 33543574 DOI: 10.1002/anie.202016081] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 01/22/2021] [Indexed: 01/01/2023]
Abstract
Catalytic asymmetric remote conjugate borylation is challenging as the control of regioselectivity is not trivial, the electrophilicity of remote sites is extenuated, and the remote asymmetric induction away from the carbonyl group is difficult. Herein, catalytic asymmetric conjugate 1,6-, 1,8- and 1,10-borylation was developed with excellent regioselectivity, which delivered α-chiral boronates in moderate to high yields with high enantioselectivity. The produced chiral boronate smoothly underwent oxidation, cross-coupling, and one-carbon homologation to give synthetically versatile chiral compounds in moderate yields with excellent stereoretention. Furthermore, a stereomechanistic analysis was conducted using DFT calculations, which provides insights into the origins of the regioselectivity. Finally, the present 1,6-borylation was successfully applied in an efficient one-pot asymmetric synthesis of (-)-7,8-dihydrokavain.
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Affiliation(s)
- Chang-Yun Shi
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Jungmin Eun
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520-8105, USA
| | - Timothy R Newhouse
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, CT, 06520-8105, USA
| | - Liang Yin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
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45
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Yu W, Han J, Fang D, Wang M, Liao J. Palladium-Catalyzed Linear Hydrothiocarbonylation of Unactivated Terminal Alkenes: Synthesis of Aliphatic Thioesters. Org Lett 2021; 23:2482-2487. [PMID: 33711895 DOI: 10.1021/acs.orglett.1c00406] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A Pd-catalyzed hydrothiocarbonylation of unactivated terminal alkenes is presented. According to this protocol, aliphatic thioesters were synthesized with exclusive linear selectivity under mild reaction conditions. Good to excellent yields (up to 91% yield), broad substrate scope, broad functional group tolerance, and utility of the method demonstrated the advantages of this protocol.
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Affiliation(s)
- Wangzhi Yu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Jian Han
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Dongmei Fang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Min Wang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Jian Liao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P.R. China.,University of Chinese Academy of Sciences, Beijing 100049, P.R. China.,College of Chemical Engineering, Sichuan University, Chengdu 610065, China
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46
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Terashima K, Kawasaki-Takasuka T, Yamazaki T. Construction of fully substituted carbon centers containing a heteroatom and a CF 3 group via in situ generated p-quinone methides. Org Biomol Chem 2021; 19:1305-1314. [PMID: 33503080 DOI: 10.1039/d0ob02469d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
1,6-Conjugate additions of in situ generated δ-CF3-δ-substituted p-quinone methides have been achieved with a variety of heteronucleophiles under mild conditions, which led to facile and practical construction of fully substituted carbon centers including a heteroatom and a CF3 group. In particular, it was revealed that some amines themselves worked for efficient cleavage of the TBS protective group, and addition of a catalytic amount of an appropriate Brønsted acid was found to sometimes improve the progress of the desired process.
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Affiliation(s)
- Kyu Terashima
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei 184-8588, Japan.
| | - Tomoko Kawasaki-Takasuka
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei 184-8588, Japan.
| | - Takashi Yamazaki
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei 184-8588, Japan.
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47
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Wei B, Ren Q, Bein T, Knochel P. Übergangsmetallfreie Synthese polyfunktioneller Triarylmethane und 1,1‐Diarylalkane durch sequentielle Kreuzkupplungen von Benzaldiacetaten mit Organozinkreagenzien. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Baosheng Wei
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Qianyi Ren
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Thomas Bein
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
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48
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Pan X, Cao M, Li S, Wang H, Liu X, Liu L. Synthesis of Diarylmethanes Bearing CF
3
‐ and CN‐Substituted All‐carbon Quaternary Centers and Diarylmalononitriles through Cyanation of δ‐Disubstituted
Para
‐Quinone Methides. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiaoguang Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University Guilin 541004 China
| | - Min Cao
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China
| | - Song Li
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China
| | - Hengshan Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University Guilin 541004 China
| | - Xigong Liu
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China
| | - Lei Liu
- School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China
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49
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Liu X, Liu B, Shi Z, Tan C, Fan R, Li Z, Tan J. Hf(OTf) 4-Catalyzed 1,6-Conjugate Addition of 2-Alkyl-azaarenes to para-Quinone Methides. J Org Chem 2021; 86:3615-3624. [PMID: 33523665 DOI: 10.1021/acs.joc.0c02982] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein we reported a Hf(OTf)4-catalyzed carbon-carbon bond formation reaction between 2-alkyl-azaarenes and para-quinone methides (p-QMs). This 1,6-conjugate addition protocol offered rapid access to a large array of triarylethane products in good yields. The catalyst loading could be reduced to 1 mol %. Studies pertinent to scale-up reaction and product derivatization were also presented.
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Affiliation(s)
- Xinyuan Liu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Binbin Liu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zhan Shi
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai, 201210, P. R. China
| | - Chen Tan
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Rong Fan
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zhi Li
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai, 201210, P. R. China
| | - Jiajing Tan
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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50
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Xiong B, Xu S, Liu Y, Tang KW, Wong WY. Metal-Free, Acid/Phosphine-Induced Regioselective Thiolation of p-Quinone Methides with Sodium Aryl/Alkyl Sulfinates. J Org Chem 2021; 86:1516-1527. [PMID: 33406835 DOI: 10.1021/acs.joc.0c02390] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A simple and efficient method for the regioselective thiolation of p-quinone methides with sodium aryl/alkyl sulfinates has been established using an acid/phosphine-induced radical route under transition-metal-free conditions. A broad range of sodium aryl/alkyl sulfinates and p-quinone methides (p-QMs) are compatible for the reaction, giving the expected products with good to excellent yields. Control experiments were also performed to gain insights into the generation mechanism of thiyl radicals and hydrogen-atom transfer process. This protocol provides a safe and feasible way for the formation of carbon-sulfur bonds.
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Affiliation(s)
- Biquan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China.,Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - Shipan Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
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