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Wang H, Chi YR, Huang X. Enantioselective Dual Catalysis of N‐Heterocyclic Carbene and Hydrogen‐Bond Donor Organocatalysts. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hongling Wang
- Shenzhen University College of Chemistry and Environmental Engineering International Joint Research Center for Molecular Science CHINA
| | - Yonggui Robin Chi
- Nanyang Technological University Division of Chemistry & Biological Chemistry 21 Nanyang Link 637371 Singapore SINGAPORE
| | - Xuan Huang
- Shenzhen University College of Chemistry and Environmental Engineering International Joint Research Center for Molecular Science CHINA
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2
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Liu B, Qi J, Wu Y, Li JH, Li Y, Duan XY. The N-heterocyclic carbene-catalyzed [3 + 2] annulation of isoindigos with enals: the enantioselective construction of three contiguous stereogenic centers. Org Chem Front 2022. [DOI: 10.1039/d1qo01507a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An NHC-catalyzed enantioselective [3 + 2] annulation of enals and isoindigo is introduced as an efficient strategy for the construction of dimeric spirocyclic bisindoline alkaloid derivatives with moderate yields and good enantioselectivities.
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Affiliation(s)
- Binghao Liu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jing Qi
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
| | - Yatong Wu
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Jia-Hui Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Yanting Li
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
| | - Xiao-Yong Duan
- Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, People's Republic of China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding 071002, People's Republic of China
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3
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Li YY, Li S, Fan T, Zhang ZJ, Song J, Gong LZ. Enantioselective Formal [4 + 3] Annulations to Access Benzodiazepinones and Benzoxazepinones via NHC/Ir/Urea Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04541] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Yang-Yang Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Shuai Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Tao Fan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zi-Jing Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
- Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Hefei, 230026, China
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Shee S, Barik S, Ghosh A, Biju AT. Synthesis of Functionalized Dihydrocoumarins by NHC-Catalyzed [3 + 3] Annulation of Enals with 2-Substituted Naphthoquinones. Org Lett 2021; 23:8039-8044. [PMID: 34585938 DOI: 10.1021/acs.orglett.1c03059] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The [3 + 3] annulation of α,β-unsaturated aldehydes with 2-substituted 1,4-naphthoquinones allowing the facile synthesis of functionalized dihydrocoumarins catalyzed by N-heterocyclic carbene (NHC) is reported. The initially formed NHC-homoenolates underwent an efficient Michael-isomerization-lactonization cascade to furnish the products. Preliminary studies on mechanism shed light on the homoenolate pathway over the intermediacy of the α,β-unsaturated acylazolium intermediates. Moreover, using chiral NHCs, the desired products were formed in up to 49% yield and 99:1 er.
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Affiliation(s)
- Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Soumen Barik
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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5
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Sharique M, Tambar UK. N-Heterocyclic carbene based catalytic platform for Hauser-Kraus annulations. Chem Sci 2020; 11:7239-7243. [PMID: 34123009 PMCID: PMC8159274 DOI: 10.1039/d0sc03116j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The venerable Hauser–Kraus annulation is an effective and convergent method for generating oxygenated polycyclic aromatic compounds. Despite its application in complex molecule synthesis, the harsh and strongly basic conditions can limit its utility in more functionalized molecular settings. We have developed the first catalytic Hauser–Kraus annulation based on N-heterocyclic carbene catalysis that proceeds under milder conditions. We demonstrate the scope of the transformation in the presence of several functional groups. We also propose a concerted mechanism for the annulation that proceeds through a non-canonical Breslow intermediate. The venerable Hauser–Kraus annulation is an effective and convergent method for generating oxygenated polycyclic aromatic compounds. A catalytic Hauser–Kraus annulation has been developed based on N-heterocyclic carbene catalysis.![]()
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Affiliation(s)
- Mohammed Sharique
- The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas Texas 75390-9038 USA
| | - Uttam K Tambar
- The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas Texas 75390-9038 USA
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6
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Maskeri MA, Schrader ML, Scheidt KA. A Sequential Umpolung/Enzymatic Dynamic Kinetic Resolution Strategy for the Synthesis of γ-Lactones. Chemistry 2020; 26:5794-5798. [PMID: 32084294 PMCID: PMC7210063 DOI: 10.1002/chem.202000747] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Indexed: 01/30/2023]
Abstract
Combining biological and small-molecule catalysts under a chemoenzymatic manifold presents a series of significant advantages to the synthetic community. We report herein the successful development of a two-step/single flask synthesis of γ-lactones through the merger of Umpolung catalysis with a ketoreductase-catalyzed dynamic kinetic resolution, reduction, and cyclization. This combined approach delivers highly enantio- and diastereoenriched heterocycles and demonstrates the feasibility of integrating NHC catalysis with enzymatic processes.
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Affiliation(s)
- Mark A. Maskeri
- Department of Chemistry, Center for Molecular Innovation and Drug, Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208
| | - Malte L. Schrader
- Department of Chemistry, Center for Molecular Innovation and Drug, Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug, Discovery, Northwestern University, Silverman Hall, Evanston, Illinois 60208
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7
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Sancheti SP, Urvashi, Shah MP, Patil NT. Ternary Catalysis: A Stepping Stone toward Multicatalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04000] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Shashank P. Sancheti
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, 462 066, India
| | - Urvashi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, 462 066, India
| | - Mosami P. Shah
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, 462 066, India
| | - Nitin T. Patil
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, 462 066, India
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8
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N-Heterocyclic Carbene (NHC)/Metal Cooperative Catalysis. Top Curr Chem (Cham) 2019; 377:35. [DOI: 10.1007/s41061-019-0266-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 11/05/2019] [Indexed: 10/25/2022]
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Maskeri MA, O'Connor MJ, Jaworski AA, Bay AV, Scheidt KA. A Cooperative Hydrogen Bond Donor–Brønsted Acid System for the Enantioselective Synthesis of Tetrahydropyrans. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811383] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Mark A. Maskeri
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Matthew J. O'Connor
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Ashley A. Jaworski
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Anna V. Bay
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Karl A. Scheidt
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
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10
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Maskeri MA, O'Connor MJ, Jaworski AA, Bay AV, Scheidt KA. A Cooperative Hydrogen Bond Donor-Brønsted Acid System for the Enantioselective Synthesis of Tetrahydropyrans. Angew Chem Int Ed Engl 2018; 57:17225-17229. [PMID: 30380196 DOI: 10.1002/anie.201811383] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 10/26/2018] [Indexed: 11/07/2022]
Abstract
Carbocations stabilized by adjacent oxygen atoms are useful reactive intermediates involved in fundamental chemical transformations. These oxocarbenium ions typically lack sufficient electron density to engage established chiral Brønsted or Lewis acid catalysts, presenting a major challenge to their widespread application in asymmetric catalysis. Leading methods for selectivity operate primarily through electrostatic pairing between the oxocarbenium ion and a chiral counterion. A general approach to new enantioselective transformations of oxocarbenium ions requires novel strategies that address the weak binding capabilities of these intermediates. We demonstrate herein a novel cooperative catalysis system for selective reactions with oxocarbenium ions. This new strategy has been applied to a highly selective and rapid oxa-Pictet-Spengler reaction and highlights a powerful combination of an achiral hydrogen bond donor with a chiral Brønsted acid.
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Affiliation(s)
- Mark A Maskeri
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Matthew J O'Connor
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Ashley A Jaworski
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Anna V Bay
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Karl A Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
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Murauski KJR, Jaworski AA, Scheidt KA. A continuing challenge: N-heterocyclic carbene-catalyzed syntheses of γ-butyrolactones. Chem Soc Rev 2018; 47:1773-1782. [PMID: 29372207 DOI: 10.1039/c7cs00386b] [Citation(s) in RCA: 215] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Catalytic, stereoselective N-heterocyclic carbene-catalyzed reactions facilitate efficient construction of many different heterocyclic compounds, such as the enantioenriched 5-membered (γ) lactones highlighted in this tutorial review. Herein, various strategies to enable formal [3+2] type annulations between electrophilic carbonyl equivalents and homoenolate nucleophiles for the synthesis of γ-lactones are summarized.
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Affiliation(s)
- Kathleen J R Murauski
- Department of Chemistry, Department of Pharmacology, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
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