1
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Sun R, Wang J, Liang H, Li S, Yang X. Hydroalkoxylation of Enamides Catalyzed by N-Heteroarenium Iodides. J Org Chem 2024; 89:3010-3019. [PMID: 38329891 DOI: 10.1021/acs.joc.3c02453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
A facile and novel N-heteroarenium iodide-catalyzed hydroalkoxylation of enamides has been described. The protocol provides easy access to N,O-acetals, which proved to be a versatile synthetic synthon. The hydrosulfonylation, hydroamination, and hydrophosphorylation products of enamide could be indirectly provided from N,O-acetals. The reaction mechanism was further investigated, which indicated that the hydroalkoxylation of enamides was driven by weak coordination between enamide and the contact ion pair of N-heteroarenium iodide.
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Affiliation(s)
- Rui Sun
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Junyi Wang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Haoran Liang
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Shuo Li
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
| | - Xiao Yang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, P. R. China
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2
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Sun X, Gao PC, Sun YW, Li BJ. Amide-Directed, Rhodium-Catalyzed Regio- and Enantioselective Hydroacylation of Internal Alkenes with Unfunctionalized Aldehydes. J Am Chem Soc 2024; 146:723-732. [PMID: 38116993 DOI: 10.1021/jacs.3c10609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Despite the current progress achieved in asymmetric hydroacylations, highly enantioselective catalytic addition of unfunctionalized aldehydes to internal alkenes remains an unsolved challenge. Here, using a coordination-assisted strategy, we developed a rhodium-catalyzed regio- and enantioselective addition of unfunctionalized aldehydes to internal alkenes such as enamides and β,γ-unsaturated amides. Valuable α-amino ketones and 1,4-dicarbonyl compounds were directly obtained with high enantioselectivity from readily available materials.
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Affiliation(s)
- Xin Sun
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Peng-Chao Gao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yu-Wen Sun
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
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3
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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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4
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Shen J, Zhang Y, Xue Y. Theoretical Insights into Enantioselective [3 + 2] Cycloaddition between Cinnamaldehyde and Cyclic N-Sulfonyl Trifluoromethylated Ketimine Catalyzed by N-Heterocyclic Carbene. J Phys Chem A 2022; 126:3124-3134. [PMID: 35549275 DOI: 10.1021/acs.jpca.2c00900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The density functional theory (DFT) method was used to investigate the mechanism and the origin of stereoselectivity of N-heterocyclic carbene (NHC)-catalyzed [3 + 2] cycloaddition between enals and cyclic imine N-sulfonyl trifluoromethyl ketimines at the M06-2X/SMD/6-311+G(d,p)//M06-2X/SMD/6-31G (d,p) level. The results show that the favorable reaction path consists of five steps: nucleophilic attack, proton transfer, the formation of the C-C bond, the tautomerism of the enol intermediate, the formation of the five-membered ring, and the regeneration of the catalyst. For the process of proton transfer, the base-assisted reaction can reduce the activation free energy and make the reaction easier to occur compared with the direct proton transfer process. The formation of the C-C bond is the crucial step of stereoselectivity, in which two chiral centers and four configurations of intermediates (RR/RS/SR/SS) were generated. The free energy barriers obtained and the noncovalent interaction analysis confirm that the dominant configuration is SS, becoming the final trans-type product observed in experiment. Furthermore, through the analyses of the conceptual DFT and natural atomic charges, it is revealed that NHC acts as a double catalyst, which can not only increase the nucleophilicity of reactants by Lewis base but also activate the C-H bond and promote the proton transfer process. The understanding of the mechanism obtained in this study should be helpful to the other organic catalytic reactions with high stereoselectivity.
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Affiliation(s)
- Jingyi Shen
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yan Zhang
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University, Chengdu 610064, People's Republic of China
| | - Ying Xue
- College of Chemistry, Key Lab of Green Chemistry and Technology in Ministry of Education, Sichuan University, Chengdu 610064, People's Republic of China
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5
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Thalakottukara DD, Gandhi T. NHC‐Organocatalysed Hydroacylation of Unactivated or Weakly Activated C−C Multiple Bonds and Ketones. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200080] [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)
- Dolly David Thalakottukara
- Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Vellore 632014 Tamilnadu India
| | - Thirumanavelan Gandhi
- Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Vellore 632014 Tamilnadu India
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6
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Zhu J, Moreno I, Quinn P, Yufit DS, Song L, Young CM, Duan Z, Tyler AR, Waddell PG, Hall MJ, Probert MR, Smith AD, O’Donoghue AC. The Role of the Fused Ring in Bicyclic Triazolium Organocatalysts: Kinetic, X-ray, and DFT Insights. J Org Chem 2022; 87:4241-4253. [PMID: 35230109 PMCID: PMC8938951 DOI: 10.1021/acs.joc.1c03073] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Indexed: 11/30/2022]
Abstract
Bicyclic triazolium scaffolds are widely employed in N-heterocyclic carbene (NHC) organocatalysis. While the incorporation of a fused ring was initially for synthetic utility in accessing chiral, modular triazolyl scaffolds, recent results highlight the potential for impact upon reaction outcome with the underpinning origins unclear. The common first step to all triazolium-catalyzed transformations is C(3)-H deprotonation to form the triazolylidene NHC. Herein, we report an analysis of the impact of size of the fused (5-, 6-, and 7-membered, n = 1, 2, and 3, respectively) ring on the C(3) proton transfer reactions of a series of bicyclic triazolium salts. Rate constants for the deuteroxide-catalyzed C(3)-H/D-exchange of triazolium salts, kDO, were significantly influenced by the size of the adjacent fused ring, with the kinetic acidity trend, or protofugalities, following the order kDO (n = 1) > kDO (n = 2) ≈ kDO (n = 3). Detailed analyses of X-ray diffraction (XRD) data for 20 triazolium salts (including 16 new structures) and of computational data for the corresponding triazolylidene NHCs provide insight on structural effects of alteration of fused ring size. In particular, changes in internal triazolyl NCN angle and positioning of the most proximal CH2 with variation in fused ring size are proposed to influence the experimental protofugality order.
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Affiliation(s)
- Jiayun Zhu
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K.
| | - Inmaculada Moreno
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K.
- Dpto.
de Química Física, Facultad de Ciencias y Tecnologías
Químicas, Universidad de Castilla
- La Mancha, Avda. Camilo
José Cela s/N, 13071 Ciudad Real, Spain
| | - Peter Quinn
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K.
| | - Dmitry S. Yufit
- Department
of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K.
| | - Lijuan Song
- School
of Science, Harbin Institute of Technology
(Shenzhen), Shenzhen, 518055, China
| | - Claire M. Young
- EaStCHEM, School of Chemistry, University
of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K.
| | - Zhuan Duan
- EaStCHEM, School of Chemistry, University
of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K.
| | - Andrew R. Tyler
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Paul G. Waddell
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Michael J. Hall
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Michael R. Probert
- Chemistry,
School of Natural and Environmental Sciences, Newcastle University, Newcastle
upon Tyne NE1 7RU, U.K.
| | - Andrew D. Smith
- EaStCHEM, School of Chemistry, University
of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K.
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7
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Wang C, Zhou L, Qiu J, Yang K, Song Q. Rh-Catalyzed diastereoselective addition of arylboronic acids to α-keto N-tert-butanesulfinyl aldimines: synthesis of α-amino ketones. Org Chem Front 2022. [DOI: 10.1039/d1qo01721g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein we present a diastereoselective addition of arylboronic acids to α-keto N-tert-butanesulfinyl aldimines catalyzed by a Rh(i) catalyst.
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Affiliation(s)
- Cece Wang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Lu Zhou
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Jian Qiu
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Kai Yang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Qiuling Song
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
- Institute of Next Generation Matter Transformation, College of Materials Science Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian, 361021, China
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8
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Wen W, Ai ZP, Yang CL, Li CX, Wu ZL, Cai T, Guo QX. Enantioselective synthesis of α-amino ketones through palladium-catalyzed asymmetric arylation of α-keto imines. Chem Sci 2022; 13:3796-3802. [PMID: 35432891 PMCID: PMC8966749 DOI: 10.1039/d2sc00386d] [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: 01/20/2022] [Accepted: 03/06/2022] [Indexed: 11/23/2022] Open
Abstract
Chiral α-amino ketones are common structural motifs in natural products and pharmaceuticals, as well as important synthons in organic synthesis. Thus, establishing efficient methods for preparing compounds with these privileged scaffolds is an important endeavor in synthetic chemistry. Herein we disclose a new catalytic asymmetric approach for the synthesis of chiral α-amino ketones through a chiral palladium-catalyzed arylation reaction of in situ generated challenging α-keto imines from previously unreported C-acyl N-sulfonyl-N,O-aminals, with arylboronic acids. The current reaction offers a straightforward approach to the asymmetric synthesis of acyclic α-amino ketones in a practical and highly stereocontrolled manner. Meanwhile, the multiple roles of the chiral Pd(ii) complex catalyst in the reaction were also reported. Chiral α-amino ketones are common structural motifs in natural products and pharmaceuticals, as well as important synthons in organic synthesis.![]()
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Affiliation(s)
- Wei Wen
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhao-Pin Ai
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Chang-Lin Yang
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Chao-Xing Li
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhu-Lian Wu
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Tian Cai
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qi-Xiang Guo
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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9
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Abstract
An efficient construction of amides through NHC-mediated oxidation of imines is described. This work has the advantages of wide scope, fast assembly and high yield, and can avoid the use of coupling agents, such as HATU, DCC, etc.
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Affiliation(s)
- Shaofa Sun
- College of Chemistry and Biological Sciences, Hubei University of Science and Technology, Hubei, 437100, China
| | - Donghui Guo
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Fangyi Li
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Jian Wang
- College of Chemistry and Biological Sciences, Hubei University of Science and Technology, Hubei, 437100, China
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
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10
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Zhang B, Yang G, Guo D, Wang J. Recent developments on NHC-driven dual catalytic approaches. Org Chem Front 2022. [DOI: 10.1039/d2qo00721e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This article takes an in depth look at the early relay combination of NHC and other catalysts, and the latest progress in dual catalysis, analyzing the breakthroughs and limitations.
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Affiliation(s)
- Bei Zhang
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Gongming Yang
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Donghui Guo
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Jian Wang
- College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
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11
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Cai Y, Jiang H, Zhu C. α-Trifluoromethyl Carbanion-catalyzed Intermolecular Stetter Reaction of Aromatic Aldehydes with 2-Bromo-3,3,3-trifluoropropene: Synthesis of β-Alkoxyl-β-trifluoromethylated Ketones. Org Lett 2021; 24:33-37. [PMID: 34918513 DOI: 10.1021/acs.orglett.1c03553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The intermolecular Stetter reaction of aromatic aldehydes with 2-bromo-3,3,3-trifluoropropene is achieved by the in situ generated α-trifluoromethyl carbanion catalyst. It not only represents the first example for α-trifluoromethyl carbanion-catalyzed umpolung reaction but also reveals a new protocol for the umpolung of aldehydes. Various useful β-alkoxyl-β-trifluoromethylated ketones were obtained in high yields, which could further convert to attractive bioactive compounds. Mechanism studies indicated an intramolecular 1,4-shift of the hydrogen atom was involved in this reaction.
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Affiliation(s)
- Yingying Cai
- School of Chemistry and Chemical Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, South China University of Technology, Guangzhou 510640, P. R. China
| | - Huanfeng Jiang
- School of Chemistry and Chemical Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, South China University of Technology, Guangzhou 510640, P. R. China
| | - Chuanle Zhu
- School of Chemistry and Chemical Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, South China University of Technology, Guangzhou 510640, P. R. China
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12
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Access to multi-functionalized oxazolines via silver-catalyzed heteroannulation of enamides with sulfoxonium ylides. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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13
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Huang W, Shrestha M, Wang C, Fang K, Teng Y, Qu J, Chen Y. Asymmetric synthesis of 3-benzyl and allyl isoindolinones by Pd-catalyzed dicarbofunctionalization of 1,1-disubstituted enamides. Org Chem Front 2021. [DOI: 10.1039/d1qo00589h] [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
The Pd-catalyzed enantioselective Heck/Suzuki reaction of 1,1-disubstituted enamides with aryl/vinyl boronic acids has been developed to access 3-benzyl/allyl substituted isoindolinones bearing a tetrasubstituted stereogenic carbon center.
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Affiliation(s)
- Wenyi Huang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
| | - Mohini Shrestha
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
| | - Chenchen Wang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
| | - Ke Fang
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
| | - Yaxin Teng
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
| | - Jingping Qu
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
| | - Yifeng Chen
- Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering
- Feringa Nobel Prize Scientist Joint Research Center
- Frontiers Science Center for Materiobiology and Dynamic Chemistry
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
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14
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Duan J, Zhang L, Xu G, Chen H, Ding X, Mao Y, Rong B, Zhu N, Guo K. NH4I-Triggered [4 + 2] Annulation of α,β-Unsaturated Ketoxime Acetates with N-Acetyl Enamides for the Synthesis of Pyridines. J Org Chem 2020; 85:8157-8165. [DOI: 10.1021/acs.joc.0c01081] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jindian Duan
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Lei Zhang
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Gaochen Xu
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Heming Chen
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Xiaojuan Ding
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yiyang Mao
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Binsen Rong
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ning Zhu
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
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15
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Liu RH, Shen ZY, Wang C, Loh TP, Hu XH. Selective Dehydrogenative Acylation of Enamides with Aldehydes Leading to Valuable β-Ketoenamides. Org Lett 2020; 22:944-949. [PMID: 31971809 DOI: 10.1021/acs.orglett.9b04495] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have presented a unique example of dehydrogenative acylation of enamides with aldehydes enabled by an earth-abundant iron catalyst. The protocol provides the straightforward access to valuable β-ketoenamides with ample substrate scope and excellent functional group tolerance. Notably, distinct C-H acylation of enamide rather than at N-H moiety site occurs with absolute Z-selectivity was observed. Late-stage modifications of complex molecules and versatile synthetic utility of β-ketoenamides further highlight the practicability of this transformation.
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Affiliation(s)
- Rui-Hua Liu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Zhen-Yao Shen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Cong Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering , Nanjing Tech University , Nanjing 211816 , China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore
| | - Xu-Hong Hu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering , Nanjing Tech University , Nanjing 211816 , China
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16
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Zhang B, Peng Q, Guo D, Wang J. NHC-Catalyzed Radical Trifluoromethylation Enabled by Togni Reagent. Org Lett 2020; 22:443-447. [DOI: 10.1021/acs.orglett.9b04203] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bei Zhang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Qiupeng Peng
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Donghui Guo
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Jian Wang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
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17
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Fernando JEM, Nakano Y, Zhang C, Lupton DW. Enantioselective N‐Heterocyclic Carbene Catalysis that Exploits Imine Umpolung. Angew Chem Int Ed Engl 2019; 58:4007-4011. [DOI: 10.1002/anie.201812585] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Indexed: 11/09/2022]
Affiliation(s)
| | - Yuji Nakano
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Changhe Zhang
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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18
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Fernando JEM, Nakano Y, Zhang C, Lupton DW. Enantioselective N‐Heterocyclic Carbene Catalysis that Exploits Imine Umpolung. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812585] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Yuji Nakano
- School of ChemistryMonash University Clayton 3800 Victoria Australia
| | - Changhe Zhang
- School of ChemistryMonash University Clayton 3800 Victoria Australia
| | - David W. Lupton
- School of ChemistryMonash University Clayton 3800 Victoria Australia
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19
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Murugesh N, Haribabu J, Arumugam K, Balachandran C, Swaathy R, Aoki S, Sreekanth A, Karvembu R, Vedachalam S. NHC-catalyzed green synthesis of functionalized chromones: DFT mechanistic insights and in vitro activities in cancer cells. NEW J CHEM 2019. [DOI: 10.1039/c9nj02650a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A simple green protocol for the synthesis of 3-aminochromone derivatives using a NHC catalyzed intramolecular hydroacylation reaction was developed. Further functional 3-aminochromes were evaluated for their anticancer activity.
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Affiliation(s)
- Nithya Murugesh
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Jebiti Haribabu
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | | | | | - Rajagopal Swaathy
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Shin Aoki
- Faculty of Pharmaceutical Sciences
- Tokyo University of Science
- 2641 Yamazaki
- Japan
- Research Institute of Science and Technology
| | - Anandaram Sreekanth
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
| | - Ramasamy Karvembu
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli 620 015
- India
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20
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Zhang DL, Li CK, Zeng RS, Shoberu A, Zou JP. Manganese(iii)-mediated selective phosphorylation of enamides: direct synthesis of β-phosphoryl enamides. Org Chem Front 2019. [DOI: 10.1039/c8qo01098f] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Mn(iii)-Mediated radical oxidative selective phosphorylation ofN-styrylamides to afford β-phosphoryl enamides, which could be easily transformed to β-amino phosphonic acids, is described.
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Affiliation(s)
- Dong-Liang Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Cheng-Kun Li
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Run-Sheng Zeng
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Adedamola Shoberu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Jian-Ping Zou
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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21
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Huo Y, Shen P, Duan W, Chen Z, Song C, Ma Y. Metal-free catalytic enantioselective silylation of aromatic aldehydes in water. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Lu S, Ong JY, Poh SB, Tsang T, Zhao Y. Transition-Metal-Free Decarboxylative Propargylic Substitution/Cyclization with either Azolium Enolates or Acyl Anions. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801340] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shenci Lu
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
| | - Jun-Yang Ong
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
- Graduate School for Integrative; Sciences Engineering (NGS), NUS; 28 Medical Drive 3 Singapore 117456 Singapore
| | - Si Bei Poh
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
| | - Terence Tsang
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
| | - Yu Zhao
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
- Graduate School for Integrative; Sciences Engineering (NGS), NUS; 28 Medical Drive 3 Singapore 117456 Singapore
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23
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Lu S, Ong JY, Poh SB, Tsang T, Zhao Y. Transition-Metal-Free Decarboxylative Propargylic Substitution/Cyclization with either Azolium Enolates or Acyl Anions. Angew Chem Int Ed Engl 2018; 57:5714-5719. [DOI: 10.1002/anie.201801340] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/22/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Shenci Lu
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
| | - Jun-Yang Ong
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
- Graduate School for Integrative; Sciences Engineering (NGS), NUS; 28 Medical Drive 3 Singapore 117456 Singapore
| | - Si Bei Poh
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
| | - Terence Tsang
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
| | - Yu Zhao
- Department of Chemistry; National University of Singapore (NUS); 3 Science Drive 3 Singapore 117543 Singapore
- Graduate School for Integrative; Sciences Engineering (NGS), NUS; 28 Medical Drive 3 Singapore 117456 Singapore
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24
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Zhao M, Liu JL, Liu HF, Chen J, Zhou L. Construction of Bisbenzopyrone via N-Heterocyclic Carbene Catalyzed Intramolecular Hydroacylation–Stetter Reaction Cascade. Org Lett 2018; 20:2676-2679. [DOI: 10.1021/acs.orglett.8b00882] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Ming Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Jia-Lin Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Hang-Fan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
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25
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Rossino G, Raimondi MV, Rui M, Di Giacomo M, Rossi D, Collina S. PEG 400/Cerium Ammonium Nitrate Combined with Microwave-Assisted Synthesis for Rapid Access to Beta-Amino Ketones. An Easy-to-Use Protocol for Discovering New Hit Compounds. Molecules 2018; 23:molecules23040775. [PMID: 29597271 PMCID: PMC6017047 DOI: 10.3390/molecules23040775] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 11/16/2022] Open
Abstract
Compound libraries are important requirement in target-based drug discovery. In the present work, a small focused compound library based on β-aminoketone scaffold has been prepared combining microwave-assisted organic synthesis (MAOS) with polymer-assisted solution phase synthesis (PASPS) and replacing reaction workup standard purification procedures with solid phase extraction (SPE). Specifically, the effects of solvent, such as dioxane, dimethylformamide (DMF), polyethylene glycol 400 (PEG 400), temperature, irradiation time, stoichiometric ratio of reagents, and catalysts (HCl, acetic acid, cerium ammonium nitrate (CAN)) were investigated to maximize both conversion and yield. The optimized protocol generally afforded the desired products in satisfying yields and purities. The designed library is a part of our current research on sigma 1 receptor modulators, a valuable tool for the identification of novel potential hit compounds.
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Affiliation(s)
- Giacomo Rossino
- Drug Sciences Department, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, 27100 Pavia, Italy.
| | - Maria Valeria Raimondi
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Medicinal Chemistry and Pharmaceutical Technologies Section, University of Palermo, 90100 Palermo, Italy.
| | - Marta Rui
- Drug Sciences Department, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, 27100 Pavia, Italy.
| | - Marcello Di Giacomo
- Drug Sciences Department, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, 27100 Pavia, Italy.
| | - Daniela Rossi
- Drug Sciences Department, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, 27100 Pavia, Italy.
| | - Simona Collina
- Drug Sciences Department, Medicinal Chemistry and Pharmaceutical Technology Section, University of Pavia, 27100 Pavia, Italy.
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26
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Yang T, Fan X, Zhao X, Yu W. Iron-Catalyzed Acyl Migration of Tertiary α-Azidyl Ketones: Synthetic Approach toward Enamides and Isoquinolones. Org Lett 2018; 20:1875-1879. [DOI: 10.1021/acs.orglett.8b00409] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tonghao Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xing Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaopeng Zhao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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27
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N-Heterocyclic Carbene-Catalyzed Double Michael Addition: Stereoselective Synthesis of Spirofluorenes and Multisubstituted Indanes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701269] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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28
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Wang L, Neumann H, Spannenberg A, Beller M. An Efficient Protocol to Synthesize N-Acyl-enamides and -Imines by Pd-Catalyzed Carbonylations. Chemistry 2018; 24:2164-2172. [PMID: 29171680 DOI: 10.1002/chem.201704704] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Indexed: 01/09/2023]
Abstract
For the first time, the bidentate phosphinite ligand 1,2-bis(di-tert-butylphosphinoxy)ethane (tBu2 POCH2 CH2 OPtBu2 ) was synthesized. In the presence of this ligand, various N-acyl enamides were obtained in good yields and chemoselectivity by Pd-catalyzed carbonylation reaction of imines containing α-H. Meanwhile, imines without α-H could be transformed to N-acyl imines, which form highly hindered amides by straightforward addition of Grignard reagents.
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Affiliation(s)
- Lin Wang
- Leibniz-Institut für Katalyse an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany
| | - Helfried Neumann
- Leibniz-Institut für Katalyse an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany
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29
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Zhu CZ, Wei Y, Shi M. Base-Promoted Tandem Cyclization for the Synthesis of Benzonitriles by C−C Bond Construction. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701329] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Cheng-Zhi Zhu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Mei Long Road Shanghai 200237 People's Republic of China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis; University of Chinese Academy of Sciences; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 354 Fenglin Lu Shanghai 200032 People's Republic of China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Mei Long Road Shanghai 200237 People's Republic of China
- State Key Laboratory and Institute of Elemento-organic Chemistry; Nankai University; Tianjin 300071 People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis; University of Chinese Academy of Sciences; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 354 Fenglin Lu Shanghai 200032 People's Republic of China
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30
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Wu X, Zhao P, Geng X, Wang C, Wu YD, Wu AX. Synthesis of Pyrrole-2-carbaldehyde Derivatives by Oxidative Annulation and Direct C sp3-H to C═O Oxidation. Org Lett 2018; 20:688-691. [PMID: 29327934 DOI: 10.1021/acs.orglett.7b03821] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
An efficient and practical de novo synthesis of pyrrole-2-carbaldehyde skeletons featuring oxidative annulation and Csp3-H to C═O oxidation is presented, exemplified by the preparation of pyrrole-2-carbaldehyde derivatives from aryl methyl ketones, arylamines, and acetoacetate esters. Preliminary mechanistic investigations indicate that the aldehyde oxygen atom originates from oxygen. Moreover, the developed scalable approach provides a distinct advantage over traditional oxidative functionalization of C-H moieties, avoiding the use of stoichiometric quantities of hazardous oxidants.
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Affiliation(s)
- Xia Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Peng Zhao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Xiao Geng
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Can Wang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
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31
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Wang Y, Wang Y, Wang X, Li X, Qu LB, Wei D. Competing mechanisms and origins of chemo- and stereo-selectivities of NHC-catalyzed reactions of enals with 2-aminoacrylates. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01272e] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A DFT study on competing mechanisms of NHC-catalyzed reactions of enals with 2-aminoacrylates has been performed for the first time.
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Affiliation(s)
- Yang Wang
- Department of Material and Chemical Engineering
- Zhengzhou University of Light Industry
- Zhengzhou
- P.R. China
| | - Yanyan Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Xinghua Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Xue Li
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
| | - Donghui Wei
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P.R. China
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32
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Zhao M, Zhang YT, Chen J, Zhou L. Enantioselective Reactions Catalyzed by N-Heterocyclic Carbenes. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700538] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ming Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science; Northwest University; Xi'an 710127 P. R. China
| | - Yu-Tong Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science; Northwest University; Xi'an 710127 P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science; Northwest University; Xi'an 710127 P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science; Northwest University; Xi'an 710127 P. R. China
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33
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Baldassari LL, de la Torre A, Li J, Lüdtke DS, Maulide N. Ynamide Preactivation Allows a Regio- and Stereoselective Synthesis of α,β-Disubstituted Enamides. Angew Chem Int Ed Engl 2017; 56:15723-15727. [PMID: 29032598 DOI: 10.1002/anie.201709128] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Indexed: 12/13/2022]
Abstract
A novel ynamide preactivation strategy enables the use of otherwise incompatible reagents and allows preparation of α,β-disubstituted enamides with high regio- and stereoselectivity. Mechanistic analysis reveals the intermediacy of a triflate-bound intermediate as a solution-stable, effective keteniminium reservoir, whilst still allowing subsequent addition of organometallic reagents.
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Affiliation(s)
- Lucas L Baldassari
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Aurélien de la Torre
- Institute of Organic Chemistry, University of Vienna, Währinger Strassee 38, 1090, Vienna, Austria
| | - Jing Li
- Institute of Organic Chemistry, University of Vienna, Währinger Strassee 38, 1090, Vienna, Austria
| | - Diogo S Lüdtke
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970, Porto Alegre, RS, Brazil
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Strassee 38, 1090, Vienna, Austria
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34
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Baldassari LL, de la Torre A, Li J, Lüdtke DS, Maulide N. Regio- und stereoselektive Synthese α,β-disubstituierter Enamide durch Voraktivierung von Inamiden. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lucas L. Baldassari
- Institute of Chemistry; Universidade Federal do Rio Grande do Sul; Av. Bento Gonçalves 9500 91501-970 Porto Alegre RS Brasilien
| | - Aurélien de la Torre
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Jing Li
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Diogo S. Lüdtke
- Institute of Chemistry; Universidade Federal do Rio Grande do Sul; Av. Bento Gonçalves 9500 91501-970 Porto Alegre RS Brasilien
| | - Nuno Maulide
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
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35
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Wu Z, Wang J. Enantioselective Medium-Ring Lactone Synthesis through an NHC-Catalyzed Intramolecular Desymmetrization of Prochiral 1,3-Diols. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02302] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Zijun Wu
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
| | - Jian Wang
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, China
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36
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Li XS, Zhao LL, Wang XK, Cao L, Shi XQ, Zhang R, Qi J. Enantioselective [3 + 2] Annulation of Enals with 2-Aminoacrylates Catalyzed by N-Heterocyclic Carbene. Org Lett 2017; 19:3943-3946. [DOI: 10.1021/acs.orglett.7b01860] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xing-Shuo Li
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Liang-Liang Zhao
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Xiao-Ke Wang
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Li−Li Cao
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Xiao-Qian Shi
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
| | - Rui Zhang
- Key Laboratory of Chemical Biology of Hebei Province, College of
Chemistry and Environmental Science, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, 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, and ‡Key Laboratory of Medicinal Chemistry
and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People’s Republic of China
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37
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Zhou Y, Bandar JS, Buchwald SL. Enantioselective CuH-Catalyzed Hydroacylation Employing Unsaturated Carboxylic Acids as Aldehyde Surrogates. J Am Chem Soc 2017; 139:8126-8129. [PMID: 28565905 PMCID: PMC5587210 DOI: 10.1021/jacs.7b04937] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The direct asymmetric copper hydride (CuH)-catalyzed coupling of α,β-unsaturated carboxylic acids to aryl alkenes to access chiral α-aryl dialkyl ketones is reported. A variety of substrate substitution patterns, sensitive functional groups, and heterocycles are tolerated in this reaction, which significantly expands the range of accessible products compared with existing hydroacylation methodology. Although mechanistic studies are ongoing, we propose that CuH-catalyzed silylation of unsaturated acids occurs to access a uniquely effective acyl electrophilic coupling partner.
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Affiliation(s)
- Yujing Zhou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Jeffrey S. Bandar
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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38
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Yang YJ, Ji Y, Qi L, Wang G, Hui XP. Asymmetric Synthesis of Cyclopenta[3,4]pyrroloindolones via N-Heterocyclic Carbene-Catalyzed Michael/Aldol/Lactamization Cascade Reaction. Org Lett 2017; 19:3271-3274. [DOI: 10.1021/acs.orglett.7b01411] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu-Jie Yang
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yuanyuan Ji
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Liangliang Qi
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Guanjun Wang
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xin-Ping Hui
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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39
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Chen J, Yuan P, Wang L, Huang Y. Enantioselective β-Protonation of Enals via a Shuttling Strategy. J Am Chem Soc 2017; 139:7045-7051. [DOI: 10.1021/jacs.7b02889] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jiean Chen
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
| | - Pengfei Yuan
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
| | - Leming Wang
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
| | - Yong Huang
- Key Laboratory of Chemical
Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
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40
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Xu Y, Liu XY, Wang ZQ, Tang LF. A convenient synthesis of N -vinyl enamides via the lithiation and ring-opening reaction of 2-phenyl-2-oxazolines. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.03.080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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41
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Zhao M, Chen J, Yang H, Zhou L. N-Heterocyclic Carbene-Catalyzed Intramolecular Nucleophilic Substitution: Enantioselective Construction of All-Carbon Quaternary Stereocenters. Chemistry 2017; 23:2783-2787. [DOI: 10.1002/chem.201700198] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Ming Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education; Department of Chemistry and Materials Science; Northwest University; Xi'an 710127 P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education; Department of Chemistry and Materials Science; Northwest University; Xi'an 710127 P. R. China
| | - Hui Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education; Department of Chemistry and Materials Science; Northwest University; Xi'an 710127 P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education; Department of Chemistry and Materials Science; Northwest University; Xi'an 710127 P. R. China
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42
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Janssen-Müller D, Singha S, Lied F, Gottschalk K, Glorius F. NHC-organokatalysierte CAr
-O-Bindungsspaltung: milder Zugang zu 2-Hydroxybenzophenonen. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201610203] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel Janssen-Müller
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Santanu Singha
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Fabian Lied
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Karin Gottschalk
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstraße 40 48149 Münster Deutschland
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43
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Janssen-Müller D, Singha S, Lied F, Gottschalk K, Glorius F. NHC-Organocatalyzed CAr
−O Bond Cleavage: Mild Access to 2-Hydroxybenzophenones. Angew Chem Int Ed Engl 2017; 56:6276-6279. [DOI: 10.1002/anie.201610203] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/03/2017] [Indexed: 12/24/2022]
Affiliation(s)
- Daniel Janssen-Müller
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Santanu Singha
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Fabian Lied
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Karin Gottschalk
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
| | - Frank Glorius
- Westfälische Wilhelms-Universität Münster; Organisch-Chemisches Institut; Corrensstrasse 40 48149 Münster Germany
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44
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Sallio R, Corpet M, Habert L, Durandetti M, Gosmini C, Gillaizeau I. Cobalt-Catalyzed Carbozincation of Ynamides. J Org Chem 2017; 82:1254-1259. [DOI: 10.1021/acs.joc.6b02612] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Romain Sallio
- Institute
of Organic and Analytical Chemistry, ICOA UMR 7311 CNRS, Université d’Orléans, rue de Chartres, 45100 Orléans, France
| | - Martin Corpet
- LCM,
CNRS, Ecole polytechnique, Université Paris Saclay, 91128 Palaiseau Cedex, France
| | - Loic Habert
- Institute
of Organic and Analytical Chemistry, ICOA UMR 7311 CNRS, Université d’Orléans, rue de Chartres, 45100 Orléans, France
| | - Muriel Durandetti
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, COBRA
(UMR 6014), 76000 Rouen, France
| | - Corinne Gosmini
- LCM,
CNRS, Ecole polytechnique, Université Paris Saclay, 91128 Palaiseau Cedex, France
| | - Isabelle Gillaizeau
- Institute
of Organic and Analytical Chemistry, ICOA UMR 7311 CNRS, Université d’Orléans, rue de Chartres, 45100 Orléans, France
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45
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Di Carmine G, Ragno D, De Risi C, Bortolini O, Giovannini PP, Fantin G, Massi A. Synthesis of functionalized imidazolidine-2-thiones via NHC/base-promoted aza-benzoin/aza-acetalization domino reactions. Org Biomol Chem 2017; 15:8788-8801. [DOI: 10.1039/c7ob02259j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Benzylidene thioureas were generated in situ from α-sulfonylamines and used as novel umpolung acceptors in aza-benzoin/aza-acetalization domino reactions giving 5-hydroxy-imidazolidine-2-thiones.
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Affiliation(s)
- Graziano Di Carmine
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
| | - Daniele Ragno
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
| | - Carmela De Risi
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
| | - Olga Bortolini
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
| | - Pier Paolo Giovannini
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
| | - Giancarlo Fantin
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- I-44121 Ferrara
- Italy
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46
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Cong ZS, Li YG, Chen L, Xing F, Du GF, Gu CZ, He L. N-Heterocyclic carbene-catalyzed stereoselective construction of olefinic carbon–sulfur bonds via cross-coupling reaction of gem-difluoroalkenes and thiols. Org Biomol Chem 2017; 15:3863-3868. [DOI: 10.1039/c7ob00599g] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel organocatalytic olefinic carbon–sulfur bond forming reaction was developed.
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Affiliation(s)
- Zi-Song Cong
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
| | - Yang-Guo Li
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
| | - Lei Chen
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
| | - Fen Xing
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
| | - Guang-Fen Du
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
- Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region
| | - Cheng-Zhi Gu
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
| | - Lin He
- School of Chemistry and Chemical Engineering
- Shihezi University
- Xinjiang Uygur Autonomous Region
- People's Republic of China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
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47
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Xiong Z, Liang D, Luo S. Palladium-catalyzed β-selective C(sp2)–H carboxamidation of enamides by isocyanide insertion: synthesis of N-acyl enamine amides. Org Chem Front 2017. [DOI: 10.1039/c7qo00049a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient synthesis of N-acyl enamine amides via palladium-catalyzed alkene C–H activation and isocyanide insertion has been developed.
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Affiliation(s)
- Zhuang Xiong
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- Chinese Academy of Sciences
- Guangzhou 510530
- China
| | - Dongdong Liang
- Department of Pharmaceutical Sciences
- University of Maryland School of Pharmacy
- Baltimore
- USA
| | - Shuang Luo
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- Chinese Academy of Sciences
- Guangzhou 510530
- China
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48
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Qiao Y, Chen X, Wei D, Chang J. Insights into the Competing Mechanisms and Origin of Enantioselectivity for N-Heterocyclic Carbene-Catalyzed Reaction of Aldehyde with Enamide. Sci Rep 2016; 6:38200. [PMID: 27905524 PMCID: PMC5131292 DOI: 10.1038/srep38200] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/04/2016] [Indexed: 12/16/2022] Open
Abstract
Hydroacylation reactions and aza-benzoin reactions have attracted considerable attention from experimental chemists. Recently, Wang et al. reported an interesting reaction of N-heterocyclic carbene (NHC)-catalyzed addition of aldehyde to enamide, in which both hydroacylation and aza-benzoin reactions may be involved. Thus, understanding the competing relationship between them is of great interest. Now, density functional theory (DFT) investigation was performed to elucidate this issue. Our results reveal that enamide can tautomerize to its imine isomer with the assistance of HCO3-. The addition of NHC to aldehydes formed Breslow intermediate, which can go through cross-coupling with enamide via hydroacylation reaction or its imine isomer via aza-benzoin reaction. The aza-benzoin reaction requires relatively lower free energy barrier than the hydroacylation reaction. The more polar characteristic of C=N group in the imine isomers, and the more advantageous stereoelectronic effect in the carbon-carbon bond forming transition states in aza-benzoin pathway were identified to determine that the imine isomer can react with the Breslow intermediate more easily. Furthermore, the origin of enantioselectivities for the reaction was explored and reasonably explained by structural analyses on key transition states. The work should provide valuable insights for rational design of switchable NHC-catalyzed hydroacylation and aza-benzoin reactions with high stereoselectivity.
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Affiliation(s)
- Yan Qiao
- Department of Pathophysiology, School of Basic Medical Sciences
- Henan Provincial Cooperative Innovation Center for Cancer Chemoprevention, Zhengzhou 450001, Henan, China
| | - Xinhuan Chen
- Department of Pathophysiology, School of Basic Medical Sciences
- Henan Provincial Cooperative Innovation Center for Cancer Chemoprevention, Zhengzhou 450001, Henan, China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Junbiao Chang
- Department of Pathophysiology, School of Basic Medical Sciences
- Henan Provincial Cooperative Innovation Center for Cancer Chemoprevention, Zhengzhou 450001, Henan, China
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49
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Dong YT, Jin Q, Zhou L, Chen J. N-Heterocyclic Carbene Catalyzed Sulfenylation of α,β-Unsaturated Aldehydes. Org Lett 2016; 18:5708-5711. [PMID: 27786491 DOI: 10.1021/acs.orglett.6b02939] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient N-heterocyclic carbene (NHC) catalyzed sulfenylation reaction of α,β-unsaturated aldehydes with N-(arylthio)phthalimide has been developed. A wide variety of α-thioenals can be obtained with good to excellent yields and excellent Z-configuration.
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Affiliation(s)
- Yu-Ting Dong
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Quan Jin
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
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50
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Xu JH, Zheng SC, Zhang JW, Liu XY, Tan B. Construction of Tropane Derivatives by the Organocatalytic Asymmetric Dearomatization of Isoquinolines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605736] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jin-Hui Xu
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P.R. China
| | - Sheng-Cai Zheng
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P.R. China
| | - Ji-Wei Zhang
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P.R. China
| | - Xin-Yuan Liu
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P.R. China
| | - Bin Tan
- Department of Chemistry; South University of Science and Technology of China; Shenzhen 518055 P.R. China
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