1
|
Tufano E, Lee E, Barilli M, Casali E, Oštrek A, Jung H, Morana M, Kang J, Kim D, Chang S, Zanoni G. Iridium Acylnitrenoid-Initiated Biomimetic Cascade Cyclizations: Stereodefined Access to Polycyclic δ-Lactams. J Am Chem Soc 2023. [PMID: 37926946 DOI: 10.1021/jacs.3c08331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Ring-fused azacyclic compounds are important building units in the synthesis of biorelevant natural products, pharmaceutical agents, and molecular materials. Herein, we present a new approach to these condensed azacycles by a biomimetic cascade cyclization of arylalkenyl dioxazolones. This cascade reaction was found to proceed with excellent stereoselectivity and a high functional group tolerance. The substrate scope of arylalkenyl dioxazolones turned out to be highly flexible and extendable to additional terminating subunits, such as heteroaryl and alkynyl moieties. This biomimetic cyclization was elucidated to be initiated by an intramolecular transfer of the in situ generated electrophilic Ir-acylnitrenoid to the tethered olefinic double bond, leading to a key N-acylaziridine intermediate, which is in turn reacted with pendant (hetero)arenes or alkynes in a highly regio- and stereoselective manner to produce ring-fused azacyclic compounds.
Collapse
Affiliation(s)
- Eleonora Tufano
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Euijae Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Matteo Barilli
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Emanuele Casali
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Andraž Oštrek
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| | - Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Marta Morana
- Department of Earth Science, University of Firenze, Via G. La Pira 4, 50121 Firenze, Italy
| | - Jihye Kang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Giuseppe Zanoni
- Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
| |
Collapse
|
2
|
Warnica JM, Gleason JL. Mimicking enzymatic cation-π interactions in hydrazide catalyst design: access to trans-decalin frameworks. Chem Commun (Camb) 2023; 59:10496-10499. [PMID: 37559565 DOI: 10.1039/d3cc03351a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Chiral bicyclic hydrazide organocatalysts have previously been shown to catalyze the cyclization of (Z)-polyene substrates with high enantioselectivity, but with poor selectivity for the corresponding (E)-polyenes. Here we demonstrate that diazapane carboxylates bearing terphenyl groups efficiently catalyze (E)-polyene bicyclization with enantioselectivities up to 94 : 6 er and with high diastereoselectivity for trans-decalin formation. The catalysts function by simultaneously initiating the cyclization via iminium ion formation and stabilizing intermediates/transition states by cation-π interactions.
Collapse
Affiliation(s)
- Josephine M Warnica
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC, H3A 0B8, Canada.
| | - James L Gleason
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC, H3A 0B8, Canada.
| |
Collapse
|
3
|
Yang J, Chan YY, Feng W, Tse YLS, Yeung YY. Study and Applications of Tetrasubstituted Hypervalent Selenium–Halogen Species in Catalytic Electrophilic Halogenations. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Junjie Yang
- Department of Chemistry and The State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Yung-Yin Chan
- Department of Chemistry and The State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Weida Feng
- Department of Chemistry and The State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Ying-Lung Steve Tse
- Department of Chemistry and The State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Ying-Yeung Yeung
- Department of Chemistry and The State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| |
Collapse
|
4
|
Warnica JM, Gleason JL. The stabilized iminium catalyzed ( E)-polyene cyclization: trapping of non-activated terminating groups enabled by cation–π interactions. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A cyclic hydrazide catalyst bearing a pendant anthracene catalyzes the polyene cyclization of 1,5-hexadiene-2-carboxaldehydes. Bicyclic closure proceeds in substrates with non-activated terminating groups that fail to react with simple hydrazide catalysts. Computational analysis shows that stabilization through cation–π interactions throughout the reaction sequence leads to the enhanced reactivity of the catalyst.
Collapse
Affiliation(s)
- Josephine M. Warnica
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC H3A 0B8, Canada
| | - James L. Gleason
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC H3A 0B8, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke W., Montreal, QC H3A 0B8, Canada
| |
Collapse
|
5
|
Zheng T, Wang X, Ng WH, Tse YLS, Yeung YY. Catalytic enantio- and diastereoselective domino halocyclization and spiroketalization. Nat Catal 2020. [DOI: 10.1038/s41929-020-00530-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
6
|
Plamondon SJ, Warnica JM, Kaldre D, Gleason JL. Hydrazide‐Catalyzed Polyene Cyclization: Asymmetric Organocatalytic Synthesis of
cis
‐Decalins. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911952] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Samuel J. Plamondon
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - Josephine M. Warnica
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - Dainis Kaldre
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| |
Collapse
|
7
|
Plamondon SJ, Warnica JM, Kaldre D, Gleason JL. Hydrazide‐Catalyzed Polyene Cyclization: Asymmetric Organocatalytic Synthesis of
cis
‐Decalins. Angew Chem Int Ed Engl 2019; 59:253-258. [DOI: 10.1002/anie.201911952] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/23/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Samuel J. Plamondon
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - Josephine M. Warnica
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - Dainis Kaldre
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| | - James L. Gleason
- Department of Chemistry McGill University 801 Sherbrooke W. Montreal QC H3A 0B8 Canada
| |
Collapse
|
8
|
Lin WB, Mou Y, Lu HY, Hu ZQ, Chen CF. Metal-free construction of contiguous quaternary stereocentres with a polycyclic framework. Chem Commun (Camb) 2019; 55:4631-4634. [PMID: 30932125 DOI: 10.1039/c9cc01632e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of contiguous all-carbon quaternary stereocentres with an arene-annulated polycyclic framework were constructed efficiently by a metal-free and atom economic acid-catalyzed method. The reactions could be performed by acid-catalyzed cationic cyclization and rearrangement under mild conditions. Moreover, the resulting polycyclic products showed highly twisted architectures with two perpendicular planes.
Collapse
Affiliation(s)
- Wei-Bin Lin
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | | | | | | | | |
Collapse
|
9
|
Abstract
A concise and selective synthesis of the dichlorinated meroterpenoid azamerone is described. The paucity of tactics for the synthesis of natural-product-relevant chiral organochlorides motivated the development of unique strategies for accessing these motifs in enantioenriched forms. The route features a novel enantioselective chloroetherification reaction, a Pd-catalyzed cross-coupling between a quinone diazide and a boronic hemiester, and a late-stage tetrazine [4+2]-cycloaddition/oxidation cascade.
Collapse
Affiliation(s)
- Matthew L Landry
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Grace M McKenna
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| | - Noah Z Burns
- Department of Chemistry , Stanford University , Stanford , California 94305 , United States
| |
Collapse
|
10
|
Abstract
To date, more than 5000 biogenic halogenated molecules have been characterized. This number continues to increase as chemists explore chloride- and bromide-rich marine environments in search of novel bioactive natural products. Naturally occurring organohalogens span nearly all biosynthetic structural classes, exhibit a range of unique biological activities, and have been the subject of numerous investigations. Despite the abundance of and interest in halogenated molecules, enantioselective methods capable of forging carbon-halogen bonds in synthetically relevant contexts remain scarce. Accordingly, syntheses of organohalogens often rely on multistep functional group interconversions to establish carbon-halogen stereocenters. Our group has developed an enantioselective dihalogenation reaction and utilized it in the only reported examples of catalytic enantioselective halogenation in natural product synthesis. In this Account, we describe our laboratory's development of a method for catalytic, enantioselective dihalogenation and the application of this method to the synthesis of both mono- and polyhalogenated natural products. In the first part, we describe the initial discovery of a TADDOL-mediated dibromination of cinnamyl alcohols. Extension of this reaction to a second-generation system capable of selective bromochlorination, dichlorination, and dibromination is then detailed. This system is capable of controlling the enantioselectivity of dihalide formation, chemoselectivity for polyolefinic substrates, and regioselectivity in the case of bromochlorination. The ability of this method to exert control over regioselectivity of halide delivery permits selective halogenation of electronically nonbiased olefins required for total synthesis. In the second part, we demonstrate how the described dihalogenation has provided efficient access to a host of structurally diverse natural products. The most direct application of this methodology is in the synthesis of naturally occurring vicinal dihalides. Chiral vicinal bromochlorides represent a class of >175 natural products; syntheses of five members of this class, including its flagship member, (+)-halomon, have been accomplished through use of the catalytic, enantioselective bromochlorination. Likewise, enantioselective dichlorination has provided selective access to two members of the chlorosulfolipids, a class of linear, acyclic polychlorides. Synthesis of chiral monohalides has been achieved through solvolysis of enantioenriched bromochlorides; this approach has resulted in the synthesis of five bromocyclohexane-containing natural products through an enantiospecific bromopolyene cyclization. In reviewing these syntheses, a framework for the synthesis of chiral organohalogens mediated by catalytic, enantioselective dihalogenation has emerged. The development of a selective dihalogenation method has been highly enabling in the synthesis of halogenated natural products. In this Account, we detail all examples of catalytic, enantioselective halogenation in total synthesis and encourage the further development of synthetically useful halogenation methodologies.
Collapse
Affiliation(s)
- Matthew L. Landry
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Noah Z. Burns
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| |
Collapse
|
11
|
Tao Z, Robb KA, Zhao K, Denmark SE. Enantioselective, Lewis Base-Catalyzed Sulfenocyclization of Polyenes. J Am Chem Soc 2018; 140:3569-3573. [PMID: 29509003 PMCID: PMC6008787 DOI: 10.1021/jacs.8b01660] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A sulfenium-ion-initiated, catalytic, enantioselective polyene cyclization is described. Homogeranylarenes and ortho-geranylphenols undergo polycyclization in good yield, diastereoselectivity, and enantioselectivity. The stereodetermining step is the generation of an enantiomerically enriched thiiranium ion from a terminal alkene and a sulfenylating agent in the presence of a chiral Lewis basic catalyst. The use of hexafluoroisopropyl alcohol as the solvent is crucial to obtain good yields. The thioether moiety resulting from the reaction can be subsequently transformed into diverse oxygen and carbon functionality postcyclization. The utility of this method is demonstrated by the enantioselective syntheses of (+)-ferruginol and (+)-hinokiol.
Collapse
Affiliation(s)
- Zhonglin Tao
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Kevin A. Robb
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Kuo Zhao
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Scott E. Denmark
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| |
Collapse
|
12
|
Fan L, Han C, Li X, Yao J, Wang Z, Yao C, Chen W, Wang T, Zhao J. Enantioselective Polyene Cyclization Catalyzed by a Chiral Brønsted Acid. Angew Chem Int Ed Engl 2018; 57:2115-2119. [DOI: 10.1002/anie.201711603] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 12/07/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Liwen Fan
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Chunyu Han
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Xuerong Li
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Jiasheng Yao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Zhengning Wang
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Chaochao Yao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Weihao Chen
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Tao Wang
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
- Key Laboratory of Chemical Biology of Jiangxi Province; China
| | - Junfeng Zhao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
- Key Laboratory of Chemical Biology of Jiangxi Province; China
| |
Collapse
|
13
|
Fan L, Han C, Li X, Yao J, Wang Z, Yao C, Chen W, Wang T, Zhao J. Enantioselective Polyene Cyclization Catalyzed by a Chiral Brønsted Acid. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711603] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Liwen Fan
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Chunyu Han
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Xuerong Li
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Jiasheng Yao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Zhengning Wang
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Chaochao Yao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Weihao Chen
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
| | - Tao Wang
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
- Key Laboratory of Chemical Biology of Jiangxi Province; China
| | - Junfeng Zhao
- College of Chemistry & Chemical Engineering; Jiangxi Normal University; Nanchang 330022 China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
- Key Laboratory of Chemical Biology of Jiangxi Province; China
| |
Collapse
|
14
|
Xu L, Yang P, Wang L. Direct functionalization of benzylic and non-benzylic C(sp3)–H bonds via keteniminium ion initiated cascade [1,5]-hydrogen transfer/cyclization. Org Chem Front 2018. [DOI: 10.1039/c8qo00314a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Keteniminium intermediates generated in situ initiate the cascade [1,5]-hydride transfer/cyclization for the direct functionalization of benzylic and non-benzylic C(sp3)–H bonds.
Collapse
Affiliation(s)
- Lubin Xu
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| | - Pengfei Yang
- School of Chemistry and Pharmaceutical Engineering
- Qilu University of Technology
- Jinan
- China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao
- China
| |
Collapse
|
15
|
Burckle AJ, Gál B, Seidl FJ, Vasilev VH, Burns NZ. Enantiospecific Solvolytic Functionalization of Bromochlorides. J Am Chem Soc 2017; 139:13562-13569. [PMID: 28858493 PMCID: PMC5987033 DOI: 10.1021/jacs.7b07792] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Herein, we report that under mild solvolytic conditions, enantioenriched bromochlorides can be ionized, stereospecifically cyclized to an array of complex bromocyclic scaffolds, or intermolecularly trapped by exogenous nucleophiles. Mechanistic investigations support an ionic mechanism wherein the bromochloride serves as an enantioenriched bromonium surrogate. Several natural product-relevant motifs are accessed in enantioenriched form for the first time with high levels of stereocontrol, and this technology is applied to the scalable synthesis of a polycyclic brominated natural product. Arrays of nucleophiles including olefins, alkynes, heterocycles, and epoxides are competent traps in the bromonium-induced cyclizations, leading to the formation of enantioenriched mono-, bi-, and tricyclic products. This strategy is further amenable to intermolecular coupling between cinnamyl bromochlorides and a diverse set of commercially available nucleophiles. Collectively, this work demonstrates that enantioenriched bromonium chlorides are configurationally stable under solvolytic conditions in the presence of a variety of functional groups.
Collapse
Affiliation(s)
- Alexander J. Burckle
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Bálint Gál
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Frederick J. Seidl
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Vasil H. Vasilev
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Noah Z. Burns
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| |
Collapse
|
16
|
Grayfer TD, Retailleau P, Dodd RH, Dubois J, Cariou K. Chemodivergent, Tunable, and Selective Iodine(III)-Mediated Bromo-Functionalizations of Polyprenoids. Org Lett 2017; 19:4766-4769. [DOI: 10.1021/acs.orglett.7b02125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tatyana D. Grayfer
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Robert H. Dodd
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Joëlle Dubois
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Kevin Cariou
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| |
Collapse
|
17
|
Graham M, Baker RW, McErlean CSP. Cationic Polyene Cyclization for Taiwaniaquinoid Construction. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601349] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marlowe Graham
- School of Chemistry; The University of Sydney; 2006 New South Wales Australia
| | - Robert W. Baker
- School of Chemistry; The University of Sydney; 2006 New South Wales Australia
| | | |
Collapse
|
18
|
Abstract
The first catalytic asymmetric bromonium ion-induced polyene cyclization has been achieved by using a chiral BINOL-derived thiophosphoramide catalyst and 1,3-dibromo-5,5-dimethylhydantoin as an electrophilic bromine source. Bromocyclization products are obtained in high yields, with good enantiomeric ratios and high diastereoselectivity, and are abundantly found as scaffolds in natural products.
Collapse
Affiliation(s)
- Ramesh C Samanta
- Molecular Catalyst Research Center, Chubu University , 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University , 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| |
Collapse
|
19
|
Burckle AJ, Vasilev VH, Burns NZ. A Unified Approach for the Enantioselective Synthesis of the Brominated Chamigrene Sesquiterpenes. Angew Chem Int Ed Engl 2016; 55:11476-9. [PMID: 27506430 PMCID: PMC5505624 DOI: 10.1002/anie.201605722] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Indexed: 11/09/2022]
Abstract
The brominated chamigrene sesquiterpenes constitute a large subclass of bromocyclohexane-containing natural products, yet no general enantioselective strategy for the synthesis of these small molecules exists. Herein we report a general strategy for accessing this family of secondary metabolites, including the enantioselective synthesis of (-)-α- and (-)-ent-β-bromochamigrene, (-)-dactylone, and (+)-aplydactone. Access to these molecules is enabled by a stereospecific bromopolyene cyclization initiated by the solvolysis of an enantiomerically enriched vicinal bromochloride.
Collapse
Affiliation(s)
- Alexander J Burckle
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA, 94305, USA
| | - Vasil H Vasilev
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA, 94305, USA
| | - Noah Z Burns
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA, 94305, USA.
| |
Collapse
|
20
|
Burckle AJ, Vasilev VH, Burns NZ. A Unified Approach for the Enantioselective Synthesis of the Brominated Chamigrene Sesquiterpenes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605722] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Alexander J. Burckle
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305 USA
| | - Vasil H. Vasilev
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305 USA
| | - Noah Z. Burns
- Department of Chemistry Stanford University 333 Campus Drive Stanford CA 94305 USA
| |
Collapse
|
21
|
Abstract
The cyclization of polyolefins represents a powerful tool for the rapid generation of molecular complexity. Within the last decade, significant discoveries have been made in the development of methods for converting prochiral polyene substrates into the corresponding polycyclic products with high levels of enantiocontrol. This review highlights advances in the area of enantioselective polyene cyclizations and their use in the synthesis of complex secondary metabolites.
Collapse
Affiliation(s)
- Chad N Ungarean
- Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.
| | | | | |
Collapse
|
22
|
Sawamura Y, Ogura Y, Nakatsuji H, Sakakura A, Ishihara K. Enantioselective bromocyclization of 2-geranylphenols induced by chiral phosphite-urea bifunctional catalysts. Chem Commun (Camb) 2016; 52:6068-71. [PMID: 27020117 DOI: 10.1039/c6cc00229c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chiral phosphite-urea bifunctional catalysts have been developed for the enantioselective bromocyclization of 2-geranylphenols with N-bromophthalimide (NBP) for the first time. The chiral triaryl phosphite moiety activates NBP to generate a bromophosphonium ion. On the other hand, the urea moiety interacts with a hydroxyl group of the substrate through hydrogen bonding interactions. Enantioselectivity is effectively induced through two-point attractive interactions between the catalyst and the substrate.
Collapse
Affiliation(s)
- Yasuhiro Sawamura
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan.
| | | | | | | | | |
Collapse
|
23
|
Chung WJ, Vanderwal CD. Stereoselective Halogenation in Natural Product Synthesis. Angew Chem Int Ed Engl 2016; 55:4396-434. [PMID: 26833878 PMCID: PMC6028003 DOI: 10.1002/anie.201506388] [Citation(s) in RCA: 196] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 08/27/2015] [Indexed: 01/23/2023]
Abstract
At last count, nearly 5000 halogenated natural products have been discovered. In approximately half of these compounds, the carbon atom to which the halogen is bound is sp(3) -hybridized; therefore, there are an enormous number of natural products for which stereocontrolled halogenation must be a critical component of any synthesis strategy. In this Review, we critically discuss the methods and strategies used for stereoselective introduction of halogen atoms in the context of natural product synthesis. Using the successes of the past, we also attempt to identify gaps in our synthesis technology that would aid the synthesis of halogenated natural products, as well as existing methods that have not yet seen application in complex molecule synthesis. The chemistry described herein demonstrates yet again how natural products continue to provide the inspiration for critical advances in chemical synthesis.
Collapse
Affiliation(s)
- Won-jin Chung
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju, South Korea.
| | | |
Collapse
|
24
|
Chung WJ, Vanderwal CD. Stereoselektive Halogenierungen in der Naturstoffsynthese. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201506388] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Won-jin Chung
- Department of Chemistry; Gwangju Institute of Science and Technology; Gwangju Südkorea
| | | |
Collapse
|
25
|
Suzuki K, Yamakoshi H, Nakamura S. Construction of Bridged Polycyclic Systems by Polyene Cyclization. Chemistry 2015; 21:17605-9. [DOI: 10.1002/chem.201503969] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Indexed: 01/06/2023]
|
26
|
Li J, Grillo AS, Burke MD. From synthesis to function via iterative assembly of N-methyliminodiacetic acid boronate building blocks. Acc Chem Res 2015; 48:2297-307. [PMID: 26200460 PMCID: PMC4688257 DOI: 10.1021/acs.accounts.5b00128] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The study and optimization of small molecule function is often impeded by the time-intensive and specialist-dependent process that is typically used to make such compounds. In contrast, general and automated platforms have been developed for making peptides, oligonucleotides, and increasingly oligosaccharides, where synthesis is simplified to iterative applications of the same reactions. Inspired by the way natural products are biosynthesized via the iterative assembly of a defined set of building blocks, we developed a platform for small molecule synthesis involving the iterative coupling of haloboronic acids protected as the corresponding N-methyliminodiacetic acid (MIDA) boronates. Here we summarize our efforts thus far to develop this platform into a generalized and automated approach for small molecule synthesis. We and others have employed this approach to access many polyene-based compounds, including the polyene motifs found in >75% of all polyene natural products. This platform further allowed us to derivatize amphotericin B, the powerful and resistance-evasive but also highly toxic last line of defense in treating systemic fungal infections, and thereby understand its mechanism of action. This synthesis-enabled mechanistic understanding has led us to develop less toxic derivatives currently under evaluation as improved antifungal agents. To access more Csp(3)-containing small molecules, we gained a stereocontrolled entry into chiral, non-racemic α-boryl aldehydes through the discovery of a chiral derivative of MIDA. These α-boryl aldehydes are versatile intermediates for the synthesis of many Csp(3) boronate building blocks that are otherwise difficult to access. In addition, we demonstrated the utility of these types of building blocks in accessing pharmaceutically relevant targets via an iterative Csp(3) cross-coupling cycle. We have further expanded the scope of the platform to include stereochemically complex macrocyclic and polycyclic molecules using a linear-to-cyclized strategy, in which Csp(3) boronate building blocks are iteratively assembled into linear precursors that are then cyclized into the cyclic frameworks found in many natural products and natural product-like structures. Enabled by the serendipitous discovery of a catch-and-release protocol for generally purifying MIDA boronate intermediates, the platform has been automated. The synthesis of 14 distinct classes of small molecules, including pharmaceuticals, materials components, and polycyclic natural products, has been achieved using this new synthesis machine. It is anticipated that the scope of small molecules accessible by this platform will continue to expand via further developments in building block synthesis, Csp(3) cross-coupling methodologies, and cyclization strategies. Achieving these goals will enable the more generalized synthesis of small molecules and thereby help shift the rate-limiting step in small molecule science from synthesis to function.
Collapse
Affiliation(s)
- Junqi Li
- Howard Hughes Medical Institute and Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Anthony S Grillo
- Howard Hughes Medical Institute and Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Martin D Burke
- Howard Hughes Medical Institute and Roger Adams Laboratory, Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
27
|
Dhambri S, Mohammad S, Van Buu ON, Galvani G, Meyer Y, Lannou MI, Sorin G, Ardisson J. Recent advances in the synthesis of natural multifunctionalized decalins. Nat Prod Rep 2015; 32:841-64. [PMID: 25891138 DOI: 10.1039/c4np00142g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This review highlights recent innovative synthetic strategies developed for the stereoselective construction of natural complex decalin systems. It offers an insight into various synthetic targets and approaches and provides information for developments within the area of natural products as well as synthetic methodology.
Collapse
Affiliation(s)
- S Dhambri
- Paris Descartes University, Sorbonne Paris Cité, Faculté des Sciences Pharmaceutiques et Biologiques, Unité CNRS UMR 8638 COMÈTE, 4 avenue de l'observatoire, 75270 PARIS Cedex 06.
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Li J, Ballmer SG, Gillis EP, Fujii S, Schmidt MJ, Palazzolo AME, Lehmann JW, Morehouse GF, Burke MD. Synthesis of many different types of organic small molecules using one automated process. Science 2015; 347:1221-6. [PMID: 25766227 DOI: 10.1126/science.aaa5414] [Citation(s) in RCA: 342] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Small-molecule synthesis usually relies on procedures that are highly customized for each target. A broadly applicable automated process could greatly increase the accessibility of this class of compounds to enable investigations of their practical potential. Here we report the synthesis of 14 distinct classes of small molecules using the same fully automated process. This was achieved by strategically expanding the scope of a building block-based synthesis platform to include even C(sp3)-rich polycyclic natural product frameworks and discovering a catch-and-release chromatographic purification protocol applicable to all of the corresponding intermediates. With thousands of compatible building blocks already commercially available, many small molecules are now accessible with this platform. More broadly, these findings illuminate an actionable roadmap to a more general and automated approach for small-molecule synthesis.
Collapse
Affiliation(s)
- Junqi Li
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Steven G Ballmer
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Eric P Gillis
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Seiko Fujii
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Michael J Schmidt
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Andrea M E Palazzolo
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jonathan W Lehmann
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Greg F Morehouse
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Martin D Burke
- Howard Hughes Medical Institute (HHMI), Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| |
Collapse
|
29
|
Dunach E. Carbon-CArbon bond formation by Lewis superacid catalysis. Chem Biodivers 2014; 11:1752-63. [PMID: 25408321 DOI: 10.1002/cbdv.201400020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Indexed: 11/09/2022]
Abstract
Diverse intramolecular cyclizations involving the formation of CC bonds are described using catalytic methodologies based on Lewis superacids. Examples are presented on 1,6-diene cyclizations to gem-dimethylcyclohexane structures. Tandem cyclization of trienes are described to afford bicyclic structures in reactions involving rearrangements. Hydroarylation of olefins and of allenes is developed in catalytic FriedelCrafts-type coupling processes, which can give rise to tandem reactions. The olfactory evaluation of the series of prepared compounds is also presented.
Collapse
Affiliation(s)
- Elisabet Dunach
- Institut de Chimie de Nice, Université de Nice-Sophia Antipolis, CNRS, UMR 7272, Parc Valrose, FR-06108 NICE Cedex 2 (fax: +33492076151).
| |
Collapse
|
30
|
Zhou J, Yeung YY. Diastereoselective synthesis of functionalized pyrrolidines through N-bromosuccinimide-induced aziridine ring expansion cascade of cinnamylaziridine. Org Biomol Chem 2014; 12:7482-5. [DOI: 10.1039/c4ob01384k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
31
|
Abstract
The first synthesis of the furan-containing snyderane, (+)-luzofuran, is reported. The key step in this approach was an electrophilic brominative cyclization, which was accomplished using a nucleophilic N-heterocycle-flanked phosphoramidite catalyst in combination with the common laboratory reagent N-bromosuccinimide.
Collapse
Affiliation(s)
- Carl Recsei
- School of Chemistry, University of Sydney, Sydney 2006, Australia
- ARC Centre
of
Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne, Victoria 3010, Australia
| | - Bun Chan
- ARC Centre
of
Excellence for Free Radical Chemistry and Biotechnology, University of Melbourne, Victoria 3010, Australia
| | | |
Collapse
|
32
|
Ishihara K. Development of Highly Selective Organic Transformation Reactions Using Halogen Lewis Acids. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
33
|
Braddock DC, Marklew JS, Foote KM, White AJP. An Enantiospecific Polyene Cyclization Initiated by an Enantiomerically Pure Bromonium Ion. Chirality 2013; 25:692-700. [DOI: 10.1002/chir.22194] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 05/10/2013] [Indexed: 11/08/2022]
|
34
|
Tripathi CB, Mukherjee S. Catalytic Enantioselective Iodoetherification of Oximes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304173] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
35
|
Tripathi CB, Mukherjee S. Catalytic Enantioselective Iodoetherification of Oximes. Angew Chem Int Ed Engl 2013; 52:8450-3. [DOI: 10.1002/anie.201304173] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 06/12/2013] [Indexed: 12/19/2022]
|
36
|
Naredla RR, Klumpp DA. Contemporary Carbocation Chemistry: Applications in Organic Synthesis. Chem Rev 2013; 113:6905-48. [DOI: 10.1021/cr4001385] [Citation(s) in RCA: 263] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Rajasekhar Reddy Naredla
- Department of Chemistry
and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115,
United States
| | - Douglas A. Klumpp
- Department of Chemistry
and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115,
United States
| |
Collapse
|
37
|
Godeau J, Fontaine-Vive F, Antoniotti S, Duñach E. Experimental and theoretical studies on the bismuth-triflate-catalysed cycloisomerisation of 1,6,10-trienes and aryl polyenes. Chemistry 2012; 18:16815-22. [PMID: 23143886 DOI: 10.1002/chem.201202263] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 10/01/2012] [Indexed: 11/07/2022]
Abstract
Cycloisomerisation of polyenes such as diethyl geranylprenylmalonate [(E)-1 a], diethyl geranylphenylmalonate [(E)-2 a] and diethyl cinnamylgeranylmalonate [(E,E)-3 a] catalysed by bismuth triflate was studied from experimental and theoretical viewpoints. Several intermediates were isolated and characterised, and calculated transition-state structures are proposed for the three reactions. The diastereoselectivity observed during the reaction of (E)- or (Z)-2 a in favour of the formation of trans-fused bicyclic products is discussed in detail. The nature of the active catalytic species derived from bismuth triflate was also investigated, and the formation of a hybrid Lewis acid/Brønsted acid catalyst with water molecules is proposed, supported by experimental and theoretical data.
Collapse
Affiliation(s)
- Julien Godeau
- Institut de Chimie de Nice, UMR, Université de Nice Sophia Antipolis-CNRS, France
| | | | | | | |
Collapse
|
38
|
Balkrishna SJ, Prasad CD, Panini P, Detty MR, Chopra D, Kumar S. Isoselenazolones as catalysts for the activation of bromine: bromolactonization of alkenoic acids and oxidation of alcohols. J Org Chem 2012; 77:9541-52. [PMID: 23046286 DOI: 10.1021/jo301486c] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Isoselenazolones were synthesized by a copper-catalyzed Se-N bond forming reaction between 2-halobenzamides and selenium powder. The catalytic activity of the various isoselenazolones was studied in the bromolactonization of pent-4-enoic acid. Isoselenazolone 9 was studied as a catalyst in several reactions: the bromolactonization of a series of alkenoic acids with bromine or N-bromosuccinimide (NBS) in the presence of potassium carbonate as base, the bromoesterification of a series of alkenes using NBS and a variety of carboxylic acids, and the oxidation of secondary alcohols to ketones using bromine as an oxidizing reagent. Mechanistic details of the isoselenazolone-catalyzed bromination reaction were revealed by (77)Se NMR spectroscopic and ES-MS studies. The oxidative addition of bromine to the isoselenazolone gives the isoselenazolone(IV) dibromide, which could be responsible for the activation of bromine under the reaction conditions. Steric effects from an N-phenylethyl group on the amide of the isoselenazolone and electron-withdrawing fluoro substituents on the benzo fused-ring of the isoselenazolone appear to enhance the stability of the isoselenazolone as a catalyst for the bromination reaction.
Collapse
Affiliation(s)
- Shah Jaimin Balkrishna
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal (IISER), Bhopal, Madhya Pradesh 462 023, India
| | | | | | | | | | | |
Collapse
|
39
|
Bovino MT, Chemler SR. Catalytic enantioselective alkene aminohalogenation/cyclization involving atom transfer. Angew Chem Int Ed Engl 2012; 51:3923-7. [PMID: 22392873 PMCID: PMC3324620 DOI: 10.1002/anie.201109044] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Indexed: 11/05/2022]
Abstract
Problem solved: the title reaction was used for the synthesis of chiral 2-bromo, chloro, and iodomethyl indolines and 2-iodomethyl pyrrolidines. Stereocenter formation is believed to occur by enantioselective cis aminocupration and C-X bond formation is believed to occur by atom transfer. The ultility of the products as versatile synthetic intermediates was demonstrated, as was a radical cascade cyclization sequence.
Collapse
Affiliation(s)
- Michael T. Bovino
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, NY 14260 (USA)
| | - Sherry R. Chemler
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, NY 14260 (USA)
| |
Collapse
|
40
|
Bovino MT, Chemler SR. Catalytic Enantioselective Alkene Aminohalogenation/Cyclization Involving Atom Transfer. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201109044] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
41
|
Sakakura A, Sakuma M, Ishihara K. Chiral Lewis Base-Assisted Brønsted Acid (LBBA)-Catalyzed Enantioselective Cyclization of 2-Geranylphenols. Org Lett 2011; 13:3130-3. [DOI: 10.1021/ol201032t] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akira Sakakura
- EcoTopia Science Institute, ‡Graduate School of Engineering, and §JST, CREST, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Masayuki Sakuma
- EcoTopia Science Institute, ‡Graduate School of Engineering, and §JST, CREST, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| | - Kazuaki Ishihara
- EcoTopia Science Institute, ‡Graduate School of Engineering, and §JST, CREST, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan
| |
Collapse
|
42
|
Goncalves S, Santoro S, Nicolas M, Wagner A, Maillos P, Himo F, Baati R. Cationic Cyclization of 2-Alkenyl-1,3-dithiolanes: Diastereoselective Synthesis of trans-Decalins. J Org Chem 2011; 76:3274-85. [DOI: 10.1021/jo2001116] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sylvie Goncalves
- Université de Strasbourg, Faculté de Pharmacie UMR/CNRS 7199, Laboratoire des Systèmes Chimiques Fonctionnels, 74 route du Rhin, BP 60024, 67401 Illkirch, France
| | - Stefano Santoro
- Department of Organic Chemistry, Arrhenius Laboratory, SE-10691 Stockholm, Sweden
| | - Marc Nicolas
- Les Laboratoires Pierre Fabre, Centre de Développement Chimique et Industriel, 16 rue Jean Rostand, 81600 Gaillac, France
| | - Alain Wagner
- Université de Strasbourg, Faculté de Pharmacie UMR/CNRS 7199, Laboratoire des Systèmes Chimiques Fonctionnels, 74 route du Rhin, BP 60024, 67401 Illkirch, France
| | - Philippe Maillos
- Les Laboratoires Pierre Fabre, Centre de Développement Chimique et Industriel, 16 rue Jean Rostand, 81600 Gaillac, France
| | - Fahmi Himo
- Department of Organic Chemistry, Arrhenius Laboratory, SE-10691 Stockholm, Sweden
| | - Rachid Baati
- Université de Strasbourg, Faculté de Pharmacie UMR/CNRS 7199, Laboratoire des Systèmes Chimiques Fonctionnels, 74 route du Rhin, BP 60024, 67401 Illkirch, France
| |
Collapse
|
43
|
Snyder SA, Treitler DS, Brucks AP. Simple reagents for direct halonium-induced polyene cyclizations. J Am Chem Soc 2011; 132:14303-14. [PMID: 20858010 DOI: 10.1021/ja106813s] [Citation(s) in RCA: 205] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Although there are many reagent combinations that can initiate polyene cyclizations, simple electrophilic halogen sources have not yet proven broadly effective as promoters of such processes. Herein is described a readily prepared and stable class of reagents capable of effecting such transformations for a wide range of electron-rich and -deficient terpenes derived from geraniol, farnesol, and nerol, thereby enabling the effective synthesis of a diverse array of complex chlorine-, bromine-, and iodine-containing polycyclic frameworks. Efforts to date have led to the first racemic laboratory total synthesis and structural revision of the anti-HIV natural product peyssonol A as well as an efficient and concise inaugural total synthesis of peyssonoic acid A. They have also permitted formal racemic total syntheses of aplysin-20, loliolide, K-76, and stemodin to be achieved through routes that are typically shorter, higher-yielding, and more environmentally conscious than previous efforts. Preliminary attempts to use chiral forms of the reagent class for enantioselective alkene halogenation are also described.
Collapse
Affiliation(s)
- Scott A Snyder
- Department of Chemistry, Columbia University, Havemeyer Hall, 3000 Broadway, New York, New York 10027, USA.
| | | | | |
Collapse
|
44
|
Braddock DC, Marklew JS, Thomas AJF. Enantiospecific bromonium ion generation and intramolecular capture: a model system for asymmetric bromonium ion-induced polyene cyclisations. Chem Commun (Camb) 2011; 47:9051-3. [DOI: 10.1039/c1cc13619d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
45
|
Affiliation(s)
- Brian Heasley
- Scynexis, Inc., P. O. Box 12878, Research Triangle Park, NC 27709‐2878, USA, Fax: +1‐919‐5448697
| |
Collapse
|
46
|
Sethofer SG, Mayer T, Toste FD. Gold(I)-catalyzed enantioselective polycyclization reactions. J Am Chem Soc 2010; 132:8276-7. [PMID: 20518531 DOI: 10.1021/ja103544p] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of enantioselective polycyclization reactions, catalyzed by a cationic bisphosphine gold complexes, are described. The polycyclization reactions, which employ an alkyne as an initiating group, begin with a gold-promoted 6-exo-dig cyclization and can be terminated with a variety of nucleophiles including carboxylic acids, phenols, sulfonamides, and electron-rich aryl groups. This method allows for the preparation of up to four bonds in a single operation with excellent diastereo- and enantioselectivity.
Collapse
Affiliation(s)
- Steven G Sethofer
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | | | | |
Collapse
|