1
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Murmu R, Kundu S, Majhi M, Pal S, Mondal A, Bisai A. Total synthesis of (+)-oridamycins A and B. Chem Commun (Camb) 2024; 60:9737-9740. [PMID: 39145465 DOI: 10.1039/d4cc03070b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
We have accomplished a unified strategy to achieve the structurally intriguing indolosesquiterpene alkaloids with diverse biological activity, xiamycin A (1a), xiamycin A methyl ester (1b) and oridamycins A (2a), and B (2b), which possesses a complex 6/6/6/5/6-fused pentacyclic skeleton bearing a carbazole moiety fused with a highly functionalized trans-decalin motif. Lewis acid-mediated epoxy-ene cyclization establishes the required pentacyclic scaffold with the installation of the four contiguous stereogenic centers. Further oxidative cleavage of the vinyl functionality, followed by successive functional group interconversions, completed the total synthesis of the indolosesquiterpene alkaloids.
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Affiliation(s)
- Ranjit Murmu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, West Bengal, India.
| | - Sourav Kundu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhauri, Bhopal-462 066, Madhya Pradesh, India
| | - Moumita Majhi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, West Bengal, India.
| | - Souvik Pal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhauri, Bhopal-462 066, Madhya Pradesh, India
| | - Abhishek Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, West Bengal, India.
| | - Alakesh Bisai
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, West Bengal, India.
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhauri, Bhopal-462 066, Madhya Pradesh, India
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2
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Niyogi S, Mondal A, Nandy M, Pal S, Khatua A, Bisai A. Total Synthesis of (+)-Dixiamycin C via a Late-Stage Ni(II)-Photoredox N-Arylation of Carbazoles. Org Lett 2024. [PMID: 39167693 DOI: 10.1021/acs.orglett.4c02436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
We report the asymmetric total synthesis of dixiamycin C (1) through the shrewd alliance of the naturally occurring monomer xiamycin A methyl ester (5) and its bromo derivative (31) following a late-stage Buchwald-Macmillan's C-N bond formation via a photoredox electron transfer approach with a less reactive carbazole nitrogen. The key step in the synthesis of monomer xiamycin A methyl ester (5) involves Buchwald's Pd(II)-mediated aerobic dehydrogenative C-N bond formation, Beckmann rearrangement, and ipso-acetylation of an electron-rich aromatic ring of an abietane core.
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Affiliation(s)
- Sovan Niyogi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Kalyani, Nadia, West Bengal741 246, India
| | - Ayan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Kalyani, Nadia, West Bengal741 246, India
| | - Monosij Nandy
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Kalyani, Nadia, West Bengal741 246, India
| | - Souvik Pal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, Madhya Pradesh 462 066, India
| | - Arindam Khatua
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, Madhya Pradesh 462 066, India
| | - Alakesh Bisai
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Kalyani, Nadia, West Bengal741 246, India
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal, Madhya Pradesh 462 066, India
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3
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Kundu S, Jana D, Mandal N, Mondal A, Murmu R, Roy NK, Datta A, Bisai A. Biomimetic total synthesis of the reported structure of (+)-selaginedorffone B. Chem Sci 2024:d4sc04103h. [PMID: 39246359 PMCID: PMC11376052 DOI: 10.1039/d4sc04103h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Accepted: 07/20/2024] [Indexed: 09/10/2024] Open
Abstract
The first enantioselective total synthesis of the reported structure of the structurally unique aromatic tetraterpenoid of anti-cancer potential, (+)-selaginedorffone B (2), has been accomplished from two modified abietane diterpenoids through an intermolecular Diels-Alder reaction between a bio-inspired diene 3 (HOMO counterpart) and dienophile 4 (corresponding LUMO counterpart) in a 23-step sequence, whereas the core framework of the monomeric abietane diterpenoid was constructed via alkyne-activated ene-cyclization. Computational analysis was conducted to reveal the intricate regio and diastereoselectivity of this novel Diels-Alder reaction, strengthening the experimental results. The absolute configuration of the synthesized molecule was validated through X-ray studies of late-stage intermediates as well as comprehensive 2D NMR analysis.
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Affiliation(s)
- Sourav Kundu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
| | - Debgopal Jana
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata Mohanpur Campus, Nadia Kalyani 741 246 West Bengal India
| | - Nilangshu Mandal
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A and 2B Raja S. C. Mullick Road, Jadavpur 700032 Kolkata West Bengal India
| | - Ayan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata Mohanpur Campus, Nadia Kalyani 741 246 West Bengal India
| | - Ranjit Murmu
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata Mohanpur Campus, Nadia Kalyani 741 246 West Bengal India
| | - Nanda Kishore Roy
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata Mohanpur Campus, Nadia Kalyani 741 246 West Bengal India
| | - Ayan Datta
- School of Chemical Sciences, Indian Association for the Cultivation of Science 2A and 2B Raja S. C. Mullick Road, Jadavpur 700032 Kolkata West Bengal India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata Mohanpur Campus, Nadia Kalyani 741 246 West Bengal India
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4
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Munda M, Mondal A, Roy NK, Murmu R, Niyogi S, Bisai A. Highly chemoselective oxidative dimerization of indolosesquiterpene alkaloids: a biomimetic approach to dixiamycin. Chem Sci 2024; 15:9164-9172. [PMID: 38903215 PMCID: PMC11186323 DOI: 10.1039/d4sc01396d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 04/17/2024] [Indexed: 06/22/2024] Open
Abstract
Dimeric indolosesquiterpene alkaloids, typically N-N- and C-N-linked xiamycin dimers, feature a pentacyclic framework with four contiguous stereogenic centers at the periphery of a trans-decalin scaffold to which a carbazole unit is attached. In comparison with actual biosynthetic dixiamycin derivatives, we designed C-C-linked xiamycin dimers, aiming to use them as a powerful tool to create unique scaffolds as drug candidates. In this work, we disclose the first synthetic route to access a C-C dimeric indolosesquiterpene skeleton, featuring a hypervalent iodine (PIFA)-catalyzed oxidative dimerization reaction in a single-step operation with overwhelming control over the chemoselectivity and regioselectivity. This strategy has been successfully applied to the synthesis of a C-C dimer of xiamycin A (3) and xiamycin A methyl ester (15) that demonstrates a new synthetic pathway for dimeric indolosesquiterpene alkaloids.
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Affiliation(s)
- Mintu Munda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
| | - Ayan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani Nadia 741 246 West Bengal India
| | - Nanda Kishore Roy
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani Nadia 741 246 West Bengal India
| | - Ranjit Murmu
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani Nadia 741 246 West Bengal India
| | - Sovan Niyogi
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani Nadia 741 246 West Bengal India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
- Department of Chemistry, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani Nadia 741 246 West Bengal India
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5
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Cook A, Newman SG. Alcohols as Substrates in Transition-Metal-Catalyzed Arylation, Alkylation, and Related Reactions. Chem Rev 2024; 124:6078-6144. [PMID: 38630862 DOI: 10.1021/acs.chemrev.4c00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Alcohols are abundant and attractive feedstock molecules for organic synthesis. Many methods for their functionalization require them to first be converted into a more activated derivative, while recent years have seen a vast increase in the number of complexity-building transformations that directly harness unprotected alcohols. This Review discusses how transition metal catalysis can be used toward this goal. These transformations are broadly classified into three categories. Deoxygenative functionalizations, representing derivatization of the C-O bond, enable the alcohol to act as a leaving group toward the formation of new C-C bonds. Etherifications, characterized by derivatization of the O-H bond, represent classical reactivity that has been modernized to include mild reaction conditions, diverse reaction partners, and high selectivities. Lastly, chain functionalization reactions are described, wherein the alcohol group acts as a mediator in formal C-H functionalization reactions of the alkyl backbone. Each of these three classes of transformation will be discussed in context of intermolecular arylation, alkylation, and related reactions, illustrating how catalysis can enable alcohols to be directly harnessed for organic synthesis.
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Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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6
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Nandi R, Niyogi S, Kundu S, Gavit VR, Munda M, Murmu R, Bisai A. Total synthesis of atropisomeric indolosesquiterpenoids via N-N bond formation: dixiamycins A and B. Chem Sci 2023; 14:8047-8053. [PMID: 37538818 PMCID: PMC10395272 DOI: 10.1039/d2sc07119c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 06/17/2023] [Indexed: 08/05/2023] Open
Abstract
N-N dimeric indolosesquiterpene alkaloids constitute a class of under-investigated architecturally intriguing natural products. Herein, we report the first chemical oxidation approach to the asymmetric total syntheses of these atropisomeric indolosesquiterpenoids through N-N bond formation. Specifically, dixiamycins A (1a) and B (1b) were prepared through a Cu(i)-mediated aerobic dehydrogenative dimerization from the naturally occurring monomer xiamycin A methyl ester (2b); this preparation also represents the first total synthesis of dixiamycin A (1a). The monomer xiamycin A methyl ester (2b) was synthesized via a late-stage Buchwald Pd(ii)-mediated aerobic dehydrogenative C-N bond formation.
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Affiliation(s)
- Rhituparna Nandi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
| | - Sovan Niyogi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani, Nadia 741 246 West Bengal India
| | - Sourav Kundu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
| | - Vipin R Gavit
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
| | - Mintu Munda
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
| | - Ranjit Murmu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani, Nadia 741 246 West Bengal India
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus Kalyani, Nadia 741 246 West Bengal India
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7
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Li Y, Fu S, Liu B. Asymmetric syntheses of ent-pimarane diterpenoids. Org Biomol Chem 2023; 21:4409-4413. [PMID: 37194415 DOI: 10.1039/d3ob00575e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Aromatic ent-pimaranes are a group of aromatized tricyclic diterpenoids that exhibit diverse bioactivities. In this work, the first total syntheses of two aromatic ent-pimaranes were achieved via a C-ABC construction sequence enabled by chiral auxiliary controlled asymmetric radical polyene cyclization, and the subsequent substrate-controlled stereo-/regio-specific hydroboration of alkene allowed for access to both natural products with C19 oxidation modifications.
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Affiliation(s)
- Yunzhou Li
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
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8
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Wai H, Micalizio GC. Toward the Asymmetric de Novo Synthesis of Lanostanes: Construction of 7,11-Dideoxy-Δ 5-lucidadone H. J Org Chem 2022; 87:14975-14979. [PMID: 36206482 PMCID: PMC9662812 DOI: 10.1021/acs.joc.2c02042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Efforts to establish an asymmetric entry to hexanorlanostanes has resulted in a concise synthesis of 7,11-dideoxy-Δ5-lucidadone H from epichlorohydrin. By exploiting metallacycle-mediated annulative cross-coupling (to establish a functionalized hydrindane) and stereoselective formation of the steroidal C9-C10 bond to establish a stereodefined 9-alkyl estrane, 14 subsequent steps have been established to generate a hexanorlanostane system. Key transformations include formal inversion of the C13 quaternary center, oxidative dearomatization/group-selective Wagner-Meerwein rearrangement, and Lewis acid mediated semi-Pinacol rearrangement.
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Affiliation(s)
- HtooTint Wai
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755, United States
| | - Glenn C. Micalizio
- Department of Chemistry, Dartmouth College, Burke Laboratory, Hanover, NH 03755, United States
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9
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Jiang B, Shi SL. Recent Progress in Upgrading of Alcohol and Amine via Asymmetric Dehydrogenative Coupling. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202207002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Cristòfol À, Limburg B, Kleij AW. Expedient Dual Co/Organophotoredox Catalyzed Stereoselective Synthesis of All‐Carbon Quaternary Centers. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103479] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Àlex Cristòfol
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Bart Limburg
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Arjan W. Kleij
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institute of Research and Advanced Studies (ICREA) Pg. Lluís Companys 23 08010 Barcelona Spain
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11
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Cristòfol À, Limburg B, Kleij AW. Expedient Dual Co/Organophotoredox Catalyzed Stereoselective Synthesis of All-Carbon Quaternary Centers. Angew Chem Int Ed Engl 2021; 60:15266-15270. [PMID: 33860978 DOI: 10.1002/anie.202103479] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/08/2021] [Indexed: 01/20/2023]
Abstract
An efficient and attractive Co/organophotoredox dual catalysis protocol has been developed allowing the stereoselective access to a wide variety of syn-configured 1,3-diols featuring quaternary carbon centers. The synthesis of the target molecules is achieved under ambient reaction conditions using modular and accessible reagents, substituted vinyl cyclic carbonates and aldehydes, and in short reaction times. Mechanistic control experiments suggest that the stereoselectivity can be rationalized via a preferred Zimmerman-Traxler transition state comprising a Co(allyl) species and an activated aldehyde. This newly developed process thus expands the use of base metal catalysis in the construction of challenging quaternary carbon stereocenters.
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Affiliation(s)
- Àlex Cristòfol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Bart Limburg
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Arjan W Kleij
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Catalan Institute of Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010, Barcelona, Spain
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12
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Abstract
AbstractHydrogen atom transfer (HAT) is one of the fundamental transformations of organic chemistry, allowing the interconversion of open- and closed-shell species through the concerted movement of a proton and an electron. Although the value of this transformation is well appreciated in isolation, with it being used for homolytic C–H activation via abstractive HAT and radical reduction via donative HAT, cooperative HAT (cHAT) reactions, in which two hydrogen atoms are removed or donated to vicinal reaction centers in succession through radical intermediates, are comparatively unknown outside of the mechanism of desaturase enzymes. This tandem reaction scheme has important ramifications in the thermochemistry of each HAT, with the bond dissociation energy (BDE) of the C–H bond adjacent to the radical center being significantly lowered relative to that of the parent alkane, allowing each HAT to be performed by different species. Herein, we discuss the thermodynamic basis of this bond strength differential in cHAT and demonstrate its use as a design principle in organic chemistry for both dehydrogenative (application 1) and hydrogenative (application 2) reactions. We hope that this overview will highlight the exciting reactivity that is possible with cHAT and inspire further developments with this mechanistic approach.1 Introduction and Theory2 Application: Dehydrogenative Transformations3 Application: Alkene Hydrogenation4 Future Applications of cHAT
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13
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Li C, Ragab SS, Liu G, Tang W. Enantioselective formation of quaternary carbon stereocenters in natural product synthesis: a recent update. Nat Prod Rep 2021; 37:276-292. [PMID: 31515549 DOI: 10.1039/c9np00039a] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Covering: 2013-2018 Natural products bearing quaternary carbon stereocenters have attracted tremendous interest from the synthetic community due to their diverse biological activities and fascinating molecular architectures. However, the construction of these molecules in an enantioselective fashion remains a long-standing challenge because of the lack of efficient asymmetric catalytic methods for installing these motifs. The rapid progress in the development of new-generation efficient chiral catalysts has opened the door for several asymmetric reactions, such as Michael addition, dearomative cyclization, polyene cyclization, α-arylation, cycloaddition, allylation, for the construction of quaternary carbon stereocenters in a highly enantioselective fashion. These asymmetric catalytic methods have greatly facilitated the synthesis of complex natural products with improved output and overall efficiency. In this concise review, we highlight the progress in the last six years in complex natural product synthesis, in which at least one quaternary carbon stereocenter has been constructed via asymmetric catalytic technologies, with particular emphasis on the analysis of the stereochemical model of each enantioselective transformation.
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Affiliation(s)
- Chengxi Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.
| | - Sherif Shaban Ragab
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China. and Photochemistry Department, Chemical Industries Research Division, National Research Centre, Dokki, 12622, Giza, Egypt
| | - Guodu Liu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China. and Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling Ling Road, Shanghai 200032, China.
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14
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Wei S, Bao X, Nawaz S, Qu J, Wang B. Identification of a tartrate-based modular guanidine towards highly asymmetric Michael addition of 3-aminooxindoles to nitroolefins. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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15
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Yang L, Wurm T, Sharma Poudel B, Krische MJ. Enantioselective Total Synthesis of Andrographolide and 14-Hydroxy-Colladonin: Carbonyl Reductive Coupling and trans-Decalin Formation by Hydrogen Transfer. Angew Chem Int Ed Engl 2020; 59:23169-23173. [PMID: 32896046 PMCID: PMC7920188 DOI: 10.1002/anie.202011363] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Indexed: 12/11/2022]
Abstract
An enantioselective total synthesis of the labdane diterpene andrographolide, the bitter principle of the herb Andrographis paniculata (known as "King of Bitters"), was accomplished in 14 steps (LLS). Key transformations include iridium-catalyzed carbonyl reductive coupling to form the quaternary C4 stereocenter, diastereoselective alkene reduction to establish the trans-decalin ring, and carbonylative lactonization to install the α-alkylidene-β-hydroxy-γ-butyrolactone.
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Affiliation(s)
| | | | | | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, 105 E 24th St. (A5300), Austin, TX 78712-1167 (USA)
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16
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Kattamuri PV, West JG. Hydrogenation of Alkenes via Cooperative Hydrogen Atom Transfer. J Am Chem Soc 2020; 142:19316-19326. [PMID: 33119986 DOI: 10.1021/jacs.0c09544] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Radical hydrogenation via hydrogen atom transfer (HAT) to alkenes is an increasingly important transformation for the formation of thermodynamic alkane isomers. Current single-catalyst methods require stoichiometric oxidant in addition to hydride (H-) source to function. Here we report a new approach to radical hydrogenation: cooperative hydrogen atom transfer (cHAT), where each hydrogen atom donated to the alkene arrives from a different catalyst. Further, these hydrogen atom (H•) equivalents are generated from complementary hydrogen atom precursors, with each alkane requiring one hydride (H-) and one proton (H+) equivalent and no added oxidants. Preliminary mechanistic study supports this reaction manifold and shows the intersection of metal-catalyzed HAT and thiol radical trapping HAT catalytic cycles to be essential for effective catalysis. Together, this unique catalyst system allows us to reduce a variety of unactivated alkene substrates to their respective alkanes in high yields and diastereoselectivities and introduces a new approach to radical hydrogenation.
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Affiliation(s)
- Padmanabha V Kattamuri
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77030, United States
| | - Julian G West
- Department of Chemistry, Rice University, BioScience Research Collaborative, Houston, Texas 77030, United States
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17
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Yang L, Wurm T, Sharma Poudel B, Krische MJ. Enantioselective Total Synthesis of Andrographolide and 14‐Hydroxy‐Colladonin: Carbonyl Reductive Coupling and
trans
‐Decalin Formation by Hydrogen Transfer. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lin Yang
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
| | - Thomas Wurm
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
| | - Binit Sharma Poudel
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
| | - Michael J. Krische
- University of Texas at Austin Department of Chemistry 105 E 24th Street (A5300) Austin TX 78712-1167 USA
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18
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Pitsinos EN, Mavridis I, Tzouma E, Vidali VP. Enantioselective Synthesis of Cassane-Type Furanoditerpenoids: Total Synthesis of Sucutiniranes C and D. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000724] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Emmanuel N. Pitsinos
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
| | - Ioannis Mavridis
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
| | - Eirini Tzouma
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
| | - Veroniki P. Vidali
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
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19
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Pfaffenbach M, Bakanas I, O'Connor NR, Herrick JL, Sarpong R. Total Syntheses of Xiamycins A, C, F, H and Oridamycin A and Preliminary Evaluation of their Anti‐Fungal Properties. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908399] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
| | - Ian Bakanas
- Department of Chemistry University of California Berkeley CA 94720 USA
| | | | | | - Richmond Sarpong
- Department of Chemistry University of California Berkeley CA 94720 USA
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20
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Pfaffenbach M, Bakanas I, O'Connor NR, Herrick JL, Sarpong R. Total Syntheses of Xiamycins A, C, F, H and Oridamycin A and Preliminary Evaluation of their Anti-Fungal Properties. Angew Chem Int Ed Engl 2019; 58:15304-15308. [PMID: 31419367 PMCID: PMC6791741 DOI: 10.1002/anie.201908399] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Indexed: 01/22/2023]
Abstract
Divergent and enantiospecific total syntheses of the indolosesquiterpenoids xiamycins A, C, F, H and oridamycin A have been accomplished. The syntheses, which commence from (R)-carvone, employ a key photoinduced benzannulation sequence to forge the carbazole moiety characteristic of these natural products. Late-stage diversification from a common intermediate enabled the first syntheses of xiamycins C and F, and an unexpected one-pot oxidative decarboxylation, which may prove general, led to xiamycin H. All synthetic intermediates and the natural products were tested for anti-fungal activity. Xiamycin H emerged as an inhibitor of three agriculturally relevant fungal pathogens.
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Affiliation(s)
- Magnus Pfaffenbach
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | - Ian Bakanas
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
| | | | - Jessica L Herrick
- Corteva Agriscience, Crop Protection Discovery, Zionsville, IN, 46077, USA
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, CA, 94720, USA
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21
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Tian H, Peng F, Zhang P, Yang H, Fu H. Highly Enantioselective Iridium-Catalyzed Cascade Double Allylation Strategy: Synthesis of Pyrrolidinoindolines with an All-Carbon Quaternary Stereocenter. Org Lett 2019; 21:8501-8505. [DOI: 10.1021/acs.orglett.9b03382] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hua Tian
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Fei Peng
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Pengxiang Zhang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Haijun Yang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hua Fu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China
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22
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Doerksen RS, Meyer CC, Krische MJ. Feedstock Reagents in Metal-Catalyzed Carbonyl Reductive Coupling: Minimizing Preactivation for Efficiency in Target-Oriented Synthesis. Angew Chem Int Ed Engl 2019; 58:14055-14064. [PMID: 31162793 PMCID: PMC6764920 DOI: 10.1002/anie.201905532] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Indexed: 12/11/2022]
Abstract
Use of abundant feedstock pronucleophiles in catalytic carbonyl reductive coupling enhances efficiency in target-oriented synthesis. For such reactions, equally inexpensive reductants are desired or, ideally, corresponding hydrogen autotransfer processes may be enacted wherein alcohols serve dually as reductant and carbonyl proelectrophile. As described in this Minireview, these concepts allow reactions that traditionally require preformed organometallic reagents to be conducted catalytically in a byproduct-free manner from inexpensive π-unsaturated precursors.
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Affiliation(s)
- Rosalie S. Doerksen
- University of Texas at Austin, Department of Chemistry Welch Hall (A5300), 105 E 24 St., Austin, TX 78712, USA
| | - Cole C. Meyer
- University of Texas at Austin, Department of Chemistry Welch Hall (A5300), 105 E 24 St., Austin, TX 78712, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry Welch Hall (A5300), 105 E 24 St., Austin, TX 78712, USA
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23
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Doerksen RS, Meyer CC, Krische MJ. Feedstock Reagents in Metal‐Catalyzed Carbonyl Reductive Coupling: Minimizing Preactivation for Efficiency in Target‐Oriented Synthesis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905532] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rosalie S. Doerksen
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Cole C. Meyer
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
| | - Michael J. Krische
- University of Texas at Austin Department of Chemistry 105 E 24th St. (A5300) Austin TX 78712-1167 USA
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25
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Green SA, Crossley SWM, Matos JLM, Vásquez-Céspedes S, Shevick SL, Shenvi RA. The High Chemofidelity of Metal-Catalyzed Hydrogen Atom Transfer. Acc Chem Res 2018; 51:2628-2640. [PMID: 30406655 DOI: 10.1021/acs.accounts.8b00337] [Citation(s) in RCA: 194] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The implementation of any chemical reaction in a structurally complex setting ( King , S. M. J. Org. Chem. 2014 , 79 , 8937 ) confronts structurally defined barriers: steric environment, functional group reactivity, product instability, and through-bond electronics. However, there are also practical barriers. Late-stage reactions conducted on small quantities of material are run inevitably at lower than optimal concentrations. Access to late-stage material limits extensive optimization. Impurities from past reactions can interfere, especially with catalytic reactions. Therefore, chemical reactions on which one can rely at the front lines of a complex synthesis campaign emerge from the crucible of total synthesis as robust, dependable, and widely applied. Trost conceptualized "chemoselectivity" as a reagent's selective reaction of one functional group or reactive site in preference to others ( Trost , B. M. Science 1983 , 219 , 245 ). Chemoselectivity and functional group tolerance can be evaluated quickly using robustness screens ( Collins , K. D. Nat. Chem. 2013 , 5 , 597 ). A reaction may also be characterized by its "chemofidelity", that is, its reliable reaction with a functional group in any molecular context. For example, ketone reduction by an electride (dissolving metal conditions) exhibits high chemofidelity but low chemoselectivity: it usually works, but many other functional groups are reduced at similar rates. Conversely, alkene coordination chemistry effected by π Lewis acids can exhibit high chemoselectivity ( Trost , B. M. Science 1983 , 219 , 245 ) but low chemofidelity: it can be highly selective for alkenes but sensitive to the substitution pattern ( Larionov , E. Chem. Commun. 2014 , 50 , 9816 ). In contrast, alkenes undergo reliable, robust, and diverse hydrogen atom transfer reactions from metal hydrides to generate carbon-centered radicals. Although there are many potential applications of this chemistry, its functional group tolerance, high rates, and ease of execution have led to its rapid deployment in complex synthesis campaigns. Its success derives from high chemofidelity, that is, its dependable reactivity in many molecular environments and with many alkene substitution patterns. Metal hydride H atom transfer (MHAT) reactions convert diverse, simple building blocks to more stereochemically and functionally dense products ( Crossley , S. W. M. Chem. Rev. 2016 , 116 , 8912 ). When hydrogen is returned to the metal, MHAT can be considered the radical equivalent of Brønsted acid catalysis-itself a broad reactivity paradigm. This Account summarizes our group's contributions to method development, reagent discovery, and mechanistic interrogation. Our earliest contribution to this area-a stepwise hydrogenation with high chemoselectivity and high chemofidelity-has found application to many problems. More recently, we reported the first examples of dual-catalytic cross-couplings that rely on the merger of MHAT cycles and nickel catalysis. With time, we anticipate that MHAT will become a staple of chemical synthesis.
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Affiliation(s)
- Samantha A. Green
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Steven W. M. Crossley
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Jeishla L. M. Matos
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Suhelen Vásquez-Céspedes
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Sophia L. Shevick
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ryan A. Shenvi
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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26
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Rao X, Li N, Bai H, Dai C, Wang Z, Tang W. Efficient Synthesis of (−)-Corynoline by Enantioselective Palladium-Catalyzed α-Arylation with Sterically Hindered Substrates. Angew Chem Int Ed Engl 2018; 57:12328-12332. [DOI: 10.1002/anie.201807302] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/30/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Xiaofeng Rao
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Naikai Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Heng Bai
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Chaodi Dai
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Zheng Wang
- Informatics and Technology; Astra Zeneca China; Shanghai China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
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27
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Rao X, Li N, Bai H, Dai C, Wang Z, Tang W. Efficient Synthesis of (−)-Corynoline by Enantioselective Palladium-Catalyzed α-Arylation with Sterically Hindered Substrates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807302] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaofeng Rao
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Naikai Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Heng Bai
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Chaodi Dai
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Zheng Wang
- Informatics and Technology; Astra Zeneca China; Shanghai China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
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28
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2016. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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29
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Chen P, Wu Y, Zhu S, Jiang H, Ma Z. Ir-Catalyzed reactions in natural product synthesis. Org Chem Front 2018. [DOI: 10.1039/c7qo00665a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review highlights the recent applications of Ir-catalyzed reactions in the total synthesis of natural products.
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Affiliation(s)
- Pengquan Chen
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Yuecheng Wu
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Shifa Zhu
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
| | - Zhiqiang Ma
- Key Lab of Functional Molecular Engineering of Guangdong Province
- School of Chemistry & Chemical Engineering
- South China University of Technology
- Guangzhou 510641
- People's Republic of China
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30
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Fontaneda R, Fañanás FJ, Rodríguez F. Construction of a diverse set of terpenoid decalin subunits from a common enantiomerically pure scaffold obtained by a biomimetic cationic cyclization. Chem Commun (Camb) 2018; 54:11025-11028. [DOI: 10.1039/c8cc07281g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unprecedented biomimetic cationic cyclization reaction is used for the synthesis of an enantiomerically pure scaffold that is easily transformed into a set of structurally diverse decalin derivatives with potential application in the synthesis of targeted natural products and/or natural-product-inspired new molecules.
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Affiliation(s)
- Raquel Fontaneda
- Instituto Universitario de Química Organometálica “Enrique Moles”, Universidad de Oviedo
- 33006-Oviedo
- Spain
| | - Francisco J. Fañanás
- Instituto Universitario de Química Organometálica “Enrique Moles”, Universidad de Oviedo
- 33006-Oviedo
- Spain
| | - Félix Rodríguez
- Instituto Universitario de Química Organometálica “Enrique Moles”, Universidad de Oviedo
- 33006-Oviedo
- Spain
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31
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Abstract
An overview of the highlights in total synthesis of natural products using iridium as a catalyst is given.
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Affiliation(s)
- Changchun Yuan
- School of Chemical Engineering and Technology
- North University of China
- Taiyuan 030051
- PR China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
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32
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Trotta AH. Toward a Unified Total Synthesis of the Xiamycin and Oridamycin Families of Indolosesquiterpenes. J Org Chem 2017; 82:13500-13516. [PMID: 29171266 DOI: 10.1021/acs.joc.7b02623] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A unified synthetic strategy toward the oridamycin and xiamycin families of natural products was designed, aiming to access several natural products from a common synthetic intermediate readily prepared from geranyl acetate. Part of this strategy was successfully realized, culminating in the synthesis of oridamycin A and oridamycin B. Key steps include a Mn(III)-mediated oxidative radical cyclization to construct the trans-decalin ring, and a 6π-electrocyclization/aromatization sequence to produce the 2,3-fused carbazole. Oridamycin B was accessed through a late-stage, C-H oxidation that converted the C16 methyl to a hydroxymethyl. A variety of strategies were explored to form a chelated radical intermediate en route to xiamycin A, including enolate SET oxidation, oxo-vanadium oxidation, and atom-transfer cyclization. Unfortunately, none of these strategies provided the desired C16-epimeric trans-decalin. Exploratory studies on photoredox-catalyzed radical cyclizations yielded interesting results, including the formation of a bicyclic lactone arising from oxidative termination of the photoredox-catalyzed radical cyclization, and a double 6-endo cyclization with catalyst loadings as low as 0.01 mol%.
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Affiliation(s)
- Adam H Trotta
- Tri-Institutional PhD Program in Chemical Biology, Laboratory for Bioorganic Chemistry, Chemical Biology Program, Sloan Kettering Institute for Cancer Research, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States
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33
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Feng J, Holmes M, Krische MJ. Acyclic Quaternary Carbon Stereocenters via Enantioselective Transition Metal Catalysis. Chem Rev 2017; 117:12564-12580. [PMID: 28910092 PMCID: PMC5651685 DOI: 10.1021/acs.chemrev.7b00385] [Citation(s) in RCA: 306] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Whereas numerous asymmetric methods for formation of quaternary carbon stereocenters in cyclic systems have been documented, the construction of acyclic quaternary carbon stereocenters with control of absolute stereochemistry remains a formidable challenge. This Review summarizes enantioselective methods for the construction of acyclic quaternary carbon stereocenters from achiral or chiral racemic reactants via transition metal catalysis.
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Affiliation(s)
- Jiajie Feng
- Department of Chemistry, Welch Hall (A5300), University of Texas at Austin , 105 East 24th Street, Austin, Texas 78712, United States
| | - Michael Holmes
- Department of Chemistry, Welch Hall (A5300), University of Texas at Austin , 105 East 24th Street, Austin, Texas 78712, United States
| | - Michael J Krische
- Department of Chemistry, Welch Hall (A5300), University of Texas at Austin , 105 East 24th Street, Austin, Texas 78712, United States
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34
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Brill ZG, Condakes ML, Ting CP, Maimone TJ. Navigating the Chiral Pool in the Total Synthesis of Complex Terpene Natural Products. Chem Rev 2017; 117:11753-11795. [PMID: 28293944 PMCID: PMC5638449 DOI: 10.1021/acs.chemrev.6b00834] [Citation(s) in RCA: 202] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The pool of abundant chiral terpene building blocks (i.e., "chiral pool terpenes") has long served as a starting point for the chemical synthesis of complex natural products, including many terpenes themselves. As inexpensive and versatile starting materials, such compounds continue to influence modern synthetic chemistry. This review highlights 21st century terpene total syntheses which themselves use small, terpene-derived materials as building blocks. An outlook to the future of research in this area is highlighted as well.
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Affiliation(s)
- Zachary G. Brill
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Matthew L. Condakes
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Chi P. Ting
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
| | - Thomas J. Maimone
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720
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35
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Khan A, Khan S, Khan I, Zhao C, Mao Y, Chen Y, Zhang YJ. Enantioselective Construction of Tertiary C–O Bond via Allylic Substitution of Vinylethylene Carbonates with Water and Alcohols. J Am Chem Soc 2017; 139:10733-10741. [DOI: 10.1021/jacs.7b04759] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ajmal Khan
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Sardaraz Khan
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Ijaz Khan
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Can Zhao
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yuxue Mao
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yan Chen
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Yong Jian Zhang
- School of Chemistry and Chemical
Engineering, and Shanghai Key Laboratory of Electrical Insulation
and Thermal Aging, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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36
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Holmes M, Nguyen KD, Schwartz LA, Luong T, Krische MJ. Enantioselective Formation of CF 3-Bearing All-Carbon Quaternary Stereocenters via C-H Functionalization of Methanol: Iridium Catalyzed Allene Hydrohydroxymethylation. J Am Chem Soc 2017; 139:8114-8117. [PMID: 28603973 PMCID: PMC5651675 DOI: 10.1021/jacs.7b04374] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Using an iridium catalyst modified by PhanePhos, CF3-allenes react with methanol to form branched products of hydrohydroxymethylation as single regioisomers with excellent levels of enantiomeric enrichment. This hydrogen autotransfer process enables catalytic enantioselective formation of acyclic CF3-bearing all-carbon quaternary stereocenters in the absence of stoichiometric metals or byproducts.
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Affiliation(s)
- Michael Holmes
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Khoa D. Nguyen
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Leyah A. Schwartz
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Tom Luong
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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37
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Zweig JE, Kim DE, Newhouse TR. Methods Utilizing First-Row Transition Metals in Natural Product Total Synthesis. Chem Rev 2017; 117:11680-11752. [PMID: 28525261 DOI: 10.1021/acs.chemrev.6b00833] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
First-row transition-metal-mediated reactions constitute an important and growing area of research due to the low cost, low toxicity, and exceptional synthetic versatility of these metals. Currently, there is considerable effort to replace existing precious-metal-catalyzed reactions with first-row analogs. More importantly, there are a plethora of unique transformations mediated by first-row metals, which have no classical second- or third-row counterpart. Herein, the application of first-row metal-mediated methods to the total synthesis of natural products is discussed. This Review is intended to highlight strategic uses of these metals to realize efficient syntheses and highlight the future potential of these reagents and catalysts in organic synthesis.
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Affiliation(s)
- Joshua E Zweig
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Daria E Kim
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
| | - Timothy R Newhouse
- Department of Chemistry, Yale University , 275 Prospect Street, New Haven, Connecticut 06520-8107, United States
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38
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Guo YA, Liang T, Kim SW, Xiao H, Krische MJ. Nickel-Catalyzed Cross-Coupling of Vinyl Dioxanones to Form Enantiomerically Enriched Cyclopropanes. J Am Chem Soc 2017; 139:6847-6850. [PMID: 28489371 DOI: 10.1021/jacs.7b03371] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Under the conditions of nickel(0) catalysis, enantiomerically enriched vinyl dioxanones engage boroxines or B2(pin)2 in stereospecific cross-coupling to form diverse tetrasubstituted cyclopropanes bearing all-carbon quaternary stereocenters. The collective data corroborate a mechanism involving nickel(0)-mediated benzylic oxidative addition with inversion of stereochemistry followed by reversible olefin insertion to form a (cyclopropylcarbinyl)nickel complex, which upon reductive elimination releases the cyclopropane.
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Affiliation(s)
- Yi-An Guo
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Tao Liang
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Seung Wook Kim
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Hongde Xiao
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Michael J Krische
- Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
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Berkes B, Ozsváth K, Molnár L, Gáti T, Holczbauer T, Kardos G, Soós T. Expedient and Diastereodivergent Assembly of Terpenoid Decalin Subunits having Quaternary Stereocenters through Organocatalytic Robinson Annulation of Nazarov Reagent. Chemistry 2016; 22:18101-18106. [DOI: 10.1002/chem.201604541] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Barbara Berkes
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Kristóf Ozsváth
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Laura Molnár
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry; Záhony Street 7 1031 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - György Kardos
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
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