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Wendlandt HC, Trammel GL, Kohler DG, Utley JA, Nicely AM, Popov AG, Hull KL. Copper-Catalyzed Three-Component Carboiminolactonization of Electron-Deficient Olefins. J Org Chem 2024; 89:2024-2031. [PMID: 38198512 PMCID: PMC10872306 DOI: 10.1021/acs.joc.3c02326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Herein we report the three-component copper-catalyzed carboiminolactonization of α,β-unsaturated carbonyl derivatives. In the presence of a Cu(I) catalyst, α-haloesters, electron-deficient alkenes, and primary amines couple to generate γ-iminolactones in a single step. The scope of the reaction is explored with respect to the three coupling partners. Nineteen examples are presented with yields of these hydrolytically labile heterocycles of up to 69%. Mechanistic investigations support the formation of an oxocarbenium by way of an atom transfer radical addition (ATRA) intermediate.
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Affiliation(s)
- Hannah C. Wendlandt
- Department of Chemistry, University of Texas at Austin, 100 East 24 Street, Austin, Texas 78712, United States
| | - Grace L. Trammel
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Daniel G. Kohler
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jacob A. Utley
- Department of Chemistry, University of Texas at Austin, 100 East 24 Street, Austin, Texas 78712, United States
| | - Aja M. Nicely
- Department of Chemistry, University of Texas at Austin, 100 East 24 Street, Austin, Texas 78712, United States
| | - Andrei G. Popov
- Department of Chemistry, University of Texas at Austin, 100 East 24 Street, Austin, Texas 78712, United States
| | - Kami L. Hull
- Department of Chemistry, University of Texas at Austin, 100 East 24 Street, Austin, Texas 78712, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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Cativiela C, Ordóñez M, Viveros-Ceballos JL. Stereoselective synthesis of acyclic α,α-disubstituted α-amino acids derivatives from amino acids templates. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130875] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Han KY, Wu X, Jiang C, Huang R, Li ZH, Feng T, Chen HP, Liu JK. Three New Compounds from the Actinomycete Actinocorallia aurantiaca. NATURAL PRODUCTS AND BIOPROSPECTING 2019; 9:351-354. [PMID: 31529277 PMCID: PMC6814668 DOI: 10.1007/s13659-019-00217-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 09/10/2019] [Indexed: 05/05/2023]
Abstract
Aurantiadioic acids A (1) and B (2), two new furan-containing polyketides, and aurantoic acid A (3), a new natural product, were isolated from the liquid fermentation of the sika deer dung-derived actinomycete Actinocorallia aurantiaca. The structures of the new compounds were established by extensive spectroscopic methods, including 1D & 2D NMR, HRESIMS spectroscopic analysis. The absolute configuration of 3 was assigned by comparison of the specific optical rotations with the reported derivatives. Biological activity evaluations suggested that compounds 1-3 showed weak inhibition on NO production in the murine monocytic RAW 264.7 macrophages with IC50 values of 35.8, 41.8, 45.2 μM, respectively. Compound 3 showed weak inhibition on influenza A virus (A/PuertoRico/8/1934, H1N1) with an EC50 value of 35.9 μM, and a selective index higher than 13.3.
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Affiliation(s)
- Kai-Yue Han
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - Xing Wu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - Chenglin Jiang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming, 650091, People's Republic of China
| | - Rong Huang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - Zheng-Hui Li
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - Tao Feng
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China
| | - He-Ping Chen
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China.
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China.
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Xiao Q, Tang Y, Xie P, Yin D. Asymmetric amination of α,α-dialkyl substituted aldehydes catalyzed by a simple chiral primary amino acid and its application to the preparation of a S1P1 agonist. RSC Adv 2019; 9:33497-33505. [PMID: 35529148 PMCID: PMC9073532 DOI: 10.1039/c9ra06210f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/24/2019] [Indexed: 11/21/2022] Open
Abstract
The chiral catalytic amination of an α,α-dialkyl substituted aldehyde usually proceeds with low enantioselectivity. We selected naphthyl-l-alanine as the catalyst and observed improved enantioselectivity for the amination. Using this method, racemic α-methyl-α-benzyloxypropanal was aminated to give chiral serine derivatives in 74% ee, which was further increased to >99% ee after recrystallization. Moreover, we also successfully synthesized a chiral phosphonium salt 9 for the preparation of one α-substituted alaninol compound 14 as an S1P1 agonist in high overall yield. The chiral catalytic amination of an α,α-dialkyl substituted aldehyde usually proceeds with low enantioselectivity.![]()
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Affiliation(s)
- Qiong Xiao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation
- Department of Medicinal Chemistry
- Institute of Materia Medica
- Peking Union Medical College
| | - Yifan Tang
- Beijing Union Pharmaceutical Factory
- PR China
| | - Ping Xie
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation
- Department of Medicinal Chemistry
- Institute of Materia Medica
- Peking Union Medical College
| | - Dali Yin
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation
- Department of Medicinal Chemistry
- Institute of Materia Medica
- Peking Union Medical College
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Iminolactones as tools for inversion of the absolute configuration of α-amino acids and as inhibitors of cancer cell proliferation. Eur J Med Chem 2016; 114:118-33. [DOI: 10.1016/j.ejmech.2016.02.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 02/14/2016] [Accepted: 02/15/2016] [Indexed: 12/13/2022]
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Liu X, Frydenvang K, Liu H, Zhai L, Chen M, Olsen CE, Christensen SB. Iminolactones from Schizophyllum commune. JOURNAL OF NATURAL PRODUCTS 2015; 78:1165-1168. [PMID: 25951057 DOI: 10.1021/np500836y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Schizines A (1) and B (2), the first naturally occurring iminolactones (3,6-dihydro-2H-1,4-oxazin-2-one derivatives) to be reported, have been isolated from the fruiting bodies of Schizophyllym commune. In principle the 2-oxazinone moiety might have been formed by a reaction between the amino acid phenylalanine or tryptophan and an 2α-hydroxy-1-ketomarasmone. The alkaloids are unusual in that the carboxyl group of the amino acid precursor is preserved during the biosynthesis. The compounds showed some inhibition of the growth of cancer cells.
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Affiliation(s)
- Xuemei Liu
- †Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
- ‡Chemistry Department, Guangxi Medical University, Shuang Yong Road, Nan Ning, Guang Xi, People's Republic of China
| | - Karla Frydenvang
- †Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Huizhen Liu
- †Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Lin Zhai
- §Department of Clinical Microbiology 7602, Rigshospitalet, Tagensvej 20, DK-2200 Copenhagen N, Denmark
| | - Ming Chen
- §Department of Clinical Microbiology 7602, Rigshospitalet, Tagensvej 20, DK-2200 Copenhagen N, Denmark
| | - Carl Erik Olsen
- ⊥Department of Basic Sciences and Environment, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark
| | - Søren Brøgger Christensen
- †Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
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Li Q, Zhang H, Li C, Xu P. Stereoselective Synthesis of (−)-Chloramphenicol, (+)-Thiamphenicol and (+)-Sphinganine via Chiral Tricyclic Iminolactone. CHINESE J CHEM 2012. [DOI: 10.1002/cjoc.201201093] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Luo YC, Zhang HH, Wang Y, Xu PF. Synthesis of α-amino acids based on chiral tricycloiminolactone derived from natural (+)-camphor. Acc Chem Res 2010; 43:1317-30. [PMID: 20672798 DOI: 10.1021/ar100050p] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amino acids are one of the most important classes of the building blocks of life: they are the structural subunits of proteins, peptides, and many secondary metabolites. In addition to the 20 α-amino acids that constitute the backbone of proteins, hundreds of other natural α-amino acids have been discovered either in free form or as components in natural products. The difference between these molecules is the substituents at the chiral carbon situated between the amino and carboxyl moieties; this carbon (and any atom along a chain attached to it) is thus an important synthetic target. Because tailor-made α-amino acids are increasingly popular in biochemistry and organic synthesis, further refinement in synthetic methods to generate both natural (L-configuration) and unnatural (D-configuration) amino acids is a very active area of current research. In this Account, we examine the tricycloiminolactones, which are versatile glycine equivalents derived from natural camphor. We have developed the tricycloiminolactones in our laboratory and used them in the synthesis of several kinds of enantiopure α-amino acids. As nucleophiles, enolated tricycloiminolactones were shown to successfully participate in alkylations, Aldol reactions, Michael additions, and Mannich reactions. These reactions all gave excellent stereoselectivities and high yields. Simple conversion of the products offered α-alkyl-α-amino acids, α,α-dialkyl-α-amino acids, β-hydroxy-α-amino acids, α,γ-diamino acids, and α,β-diamino acids. One particular advantage is that the same electrophile can react with two chiral templates in the same way, thus affording access to both enantiomeric amino acids. In other words, some natural (L-configuration) α-amino acids and their unnatural (D-configuration) counterparts can be prepared very conveniently. The relation between substrate structures and product stereoconformations derived from our investigations serves as a convenient guide in the synthesis of useful chiral amino acids. In addition, highly stereoselective 1,3-diploar cycloadditions between alkenes and chiral nitrones derived from tricycloiminolactones provide a potential method for the synthesis of γ-hydroxy-α-amino acids. We also discuss applications of our methods in the synthesis of complex natural products, including conagenin, polyoxamic acid, lactacystin, and sphingofungin F. The preparation of some clinically important drug molecules, such as thiaphenicol, florfenicol, and chloramphenicol, was greatly simplified with our methods. The tricycloiminolactones offer a number of advantages in the synthesis of both natural and unnatural α-amino acids and provide many useful building blocks in the synthetic pursuit of complex molecules.
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Affiliation(s)
- Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Huan-Huan Zhang
- State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yao Wang
- State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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Gan FF, Yang SB, Luo YC, Yang WB, Xu PF. Total Synthesis of Sphingofungin F Based on Chiral Tricyclic Iminolactone. J Org Chem 2010; 75:2737-40. [DOI: 10.1021/jo100183d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Feng-Feng Gan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Shao-Bo Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Wan-Bang Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
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Li Q, Yang SB, Zhang Z, Li L, Xu PF. Diastereo- and Enantioselective Synthesis of β-Hydroxy-α-Amino Acids: Application to the Synthesis of a Key Intermediate for Lactacystin. J Org Chem 2009; 74:1627-31. [DOI: 10.1021/jo8023973] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qiong Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Shao-Bo Yang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Zhihui Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Lei Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PRC
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Huang Y, Li Q, Liu TL, Xu PF. Diastereoselective Synthesis of β-Substituted-α,γ-Diaminobutyric Acids and Pyrrolidines Containing Multichiral Centers. J Org Chem 2008; 74:1252-8. [DOI: 10.1021/jo8023076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yan Huang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China, and College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, People's Republic of China
| | - Qiong Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China, and College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, People's Republic of China
| | - Tian-Liang Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China, and College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, People's Republic of China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China, and College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, People's Republic of China
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