1
|
Bartoccini F, Regni A, Retini M, Piersanti G. Asymmetric Total Synthesis of All Rugulovasine Stereoisomers and Preliminary Evaluation of their Biological Properties. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Francesca Bartoccini
- Universita degli Studi di Urbino Carlo Bo Department of Biomolecular Sciences Urbino ITALY
| | - Alessio Regni
- Universita degli Studi di Urbino Carlo Bo Department of Biomolecular Sciences ITALY
| | - Michele Retini
- Universita degli Studi di Urbino Carlo Bo Department of Biomolecular Sciences ITALY
| | - Giovanni Piersanti
- Universita degli Studi di Urbino Carlo Bo Department of Biomolecular Sciences P.zza Rinascimento 6 61029 Urbino ITALY
| |
Collapse
|
2
|
Rathnayake U, Garner P. Asymmetric Synthesis of Lysergic Acid via an Intramolecular (3+2) Dipolar Cycloaddition/Ring-Expansion Sequence. Org Lett 2021; 23:6756-6759. [PMID: 34382799 DOI: 10.1021/acs.orglett.1c02337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An effective, potentially scalable asymmetric synthesis of lysergic acid, a core component of the ergot alkaloid family, is reported. The synthesis features the strategic combination of an intramolecular azomethine ylide cycloaddition and Cossy-Charette ring expansion to assemble the target's C- and D-rings. Simple functional group manipulation produced a compound that had been converted to lysergic acid in four steps, thus constituting a formal synthesis of the natural product. The strategy may be used to prepare novel ergot analogues that include unnatural antipodes and may be more amenable to analogue generation relative to prior approaches.
Collapse
Affiliation(s)
- Upendra Rathnayake
- Department of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - Philip Garner
- Department of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| |
Collapse
|
3
|
Piersanti G, Bartoccini F. Synthesis and Reactivity of Uhle’s Ketone and Its Derivatives. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1340-3423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractUhle’s ketone and its derivatives are highly versatile intermediates for the synthesis of a variety of 3,4-fused tricyclic indole frameworks, i.e. indole alkaloids of the ergot family, that are found in various bioactive natural products and pharmaceuticals. Therefore, the development of a convenient preparative method for this structural motif as well as its opportune/useful derivatization have been the subject of longstanding interest in the fields of synthetic organic chemistry and medicinal chemistry. Herein, we summarize recent and less recent methods for the preparation of Uhle’s ketone and its derivatives as well as its main reactivity towards the synthesis of bioactive substances. Regarding the preparation, it can be roughly classified into two categories: (a) using 4-unfunctionalized and 4-functionalized indole derivatives as starting materials to construct a fused six-member ring, and (b) constructing the indole ring through intramolecular cycloaddition. Principally, the reactivity of the cyclic Uhle’s ketone shown here is derived from the classical electrophilicity of the carbonyl carbon or the acidity of the α-hydrogen and, though less intensively investigated, chemical reactions that induce ring expansion to form novel ring skeletons.1 Introduction2 Synthesis2.1 Disconnection A: Cyclization Reaction of the Opportune 3,4-Disubstituted Indole2.2 Disconnection B: Intramolecular Friedel–Crafts Cyclization2.3 Disconnection B: Intramolecular Cyclization via Metal–Halogen Exchange2.4 Disconnection C: Intramolecular Diels–Alder Furan Cycloaddition2.5 Disconnection D: Intramolecular Dearomatizing [3 + 2] Annulation3 Reactivity3.1 Use of Uhle’s Ketone for Lysergic Acid3.2 Use of Uhle’s Ketone for Rearranged Clavines3.3 Use of Uhle’s Ketone for Medicinal Chemistry4 Conclusion and Outlook
Collapse
|
4
|
Biosynthesis, total synthesis, and biological profiles of Ergot alkaloids. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2021; 85:1-112. [DOI: 10.1016/bs.alkal.2020.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
5
|
Wang W, Mi Y, Cao XP, Shi ZF. Enantioselective Formal Synthesis of (+)-Cycloclavine and Total Synthesis of (+)-5- epi-Cycloclavine. Org Lett 2019; 21:6603-6607. [PMID: 31411477 DOI: 10.1021/acs.orglett.9b02015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Starting from the commercially available 4-bromoindole, a concise and efficient enantioselective formal synthesis of (+)-cycloclavine (1) in 13 steps with 2.0% overall yield and a total synthesis of (+)-5-epi-cycloclavine (2) in 14 steps with 3.3% overall yield were achieved. Key features of the syntheses include the addition of a Grignard reagent to the C═N/Heck reaction sequence to construct the fused 6-5-6 ring systems, cyclopropanation, an ester aminolysis reaction, and the first example of the construction of a 3-azabicyclo[3,1,0]hexane through an intramolecular [3 + 2] cycloaddition/nitrogen extrusion.
Collapse
Affiliation(s)
- Wei Wang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yang Mi
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiao-Ping Cao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zi-Fa Shi
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| |
Collapse
|
6
|
Abstract
Fragmentation reactions that generate alkynes in conjunction with C–C bond cleavage require special considerations but can produce high-value alkyne building blocks for organic synthesis.
Collapse
Affiliation(s)
- Jingyue Yang
- Hebei Key Laboratory of Applied Chemistry
- School of Environmental and Chemical Engineering
- Yanshan University
- Qinhuangdao 066004
- China
| | - Tung T. Hoang
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Gregory B. Dudley
- C. Eugene Bennett Department of Chemistry
- West Virginia University
- Morgantown
- USA
| |
Collapse
|
7
|
Nemoto T, Harada S, Nakajima M. Synthetic Methods for 3,4-Fused Tricyclic Indoles via Indole Ring Formation. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800336] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences; Chiba University; I1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research Center; Chiba University; 1-33, Yayoi-cho, Inage-ku Chiba 263-8522, Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences; Chiba University; I1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences; Chiba University; I1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| |
Collapse
|
8
|
Deng L, Chen M, Dong G. Concise Synthesis of (-)-Cycloclavine and (-)-5- epi-Cycloclavine via Asymmetric C-C Activation. J Am Chem Soc 2018; 140:9652-9658. [PMID: 29976068 PMCID: PMC6677407 DOI: 10.1021/jacs.8b05549] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
To illustrate the synthetic significance of C-C activation methods, here we describe an efficient strategy for the enantioselective total syntheses of (-)-cycloclavine and (-)-5- epi-cycloclavine, which is enabled by an asymmetric Rh-catalyzed "cut-and-sew" transformation between benzocyclobutenones and olefins. Despite the compact structure of cycloclavine with five-fused rings, the total synthesis was accomplished in 10 steps with a 30% overall yield. Key features of the synthesis include (1) a Pd-catalyzed tandem C-N bond coupling/allylic alkylation sequence to construct the nitrogen-tethered benzocyclobutenone, (2) a highly enantioselective Rh-catalyzed carboacylation of alkenes to forge the indoline-fused tricyclic structure, and (3) a diastereoselective cyclopropanation for preparing the tetrasubstituted cyclopropane ring. Notably, an improved catalytic condition has been developed for the nitrogen-tethered cut-and-sew transformation, which uses a low catalyst loading and allows for a broad substrate scope with high enantioselectivity (94-99% e.e.). The C-C activation-based strategy employed here is anticipated to have further implications for syntheses of other natural products that contain complex fused or bridged rings.
Collapse
Affiliation(s)
- Lin Deng
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Mengqing Chen
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
- The College of Chemistry, Nankai University, Tianjin 300071, China
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| |
Collapse
|
9
|
Chaudhuri S, Ghosh S, Bhunia S, Bisai A. Catalytic asymmetric formal total syntheses of (+)- and (-)-cycloclavine. Chem Commun (Camb) 2018; 54:940-943. [PMID: 29318233 DOI: 10.1039/c7cc09045e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an expeditious catalytic asymmetric approach to clavine alkaloids via a key Heck cyclization. This reaction sets the formation of vicinal stereocenters with excellent diastereoselectivity. Utilizing the aforementioned strategy, the formal total synthesis of cycloclavine (1) has been achieved via another key late-stage ester-aminolysis of 6.
Collapse
Affiliation(s)
- Saikat Chaudhuri
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | | | | | | |
Collapse
|
10
|
Li J, Ye Y, Zhang Y. Cycloaddition/annulation strategies for the construction of multisubstituted pyrrolidines and their applications in natural product synthesis. Org Chem Front 2018. [DOI: 10.1039/c7qo01077j] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Pyrrolidines are privileged substructures of numerous bioactive natural products and drugs.
Collapse
Affiliation(s)
- Jundong Li
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Yilin Ye
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| |
Collapse
|
11
|
Wani IA, Bhattacharyya A, Sayyad M, Ghorai MK. Temperature-modulated diastereoselective transformations of 2-vinylindoles to tetrahydrocarbazoles and tetrahydrocycloheptadiindoles. Org Biomol Chem 2018; 16:2910-2922. [DOI: 10.1039/c8ob00228b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Fe(OTf)3-catalyzed dimerization of 2-vinylindolesviadiastereoselective [4 + 2] or [4 + 3] cyclization gives rise to tetrahydrocarbazoles at low temperature or tetrahydrocycloheptadiindoles at high temperature.
Collapse
Affiliation(s)
| | | | | | - Manas K. Ghorai
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| |
Collapse
|
12
|
Chen JQ, Mi Y, Shi ZF, Cao XP. Construction of the tetracyclic core of (±)-cycloclavine and 4-amino Uhle's ketone. Org Biomol Chem 2018; 16:3801-3808. [DOI: 10.1039/c7ob03067c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Construction of the tetracyclic core of (±)-cycloclavine and 4-amino Uhle's ketone.
Collapse
Affiliation(s)
- Jin-Quan Chen
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Yang Mi
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Zi-Fa Shi
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Xiao-Ping Cao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| |
Collapse
|
13
|
Harris MR, Li Q, Lian Y, Xiao J, Londregan AT. Construction of 1-Heteroaryl-3-azabicyclo[3.1.0]hexanes by sp3–sp2 Suzuki–Miyaura and Chan–Evans–Lam Coupling Reactions of Tertiary Trifluoroborates. Org Lett 2017; 19:2450-2453. [DOI: 10.1021/acs.orglett.7b01097] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael R. Harris
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Qifang Li
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Yajing Lian
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Jun Xiao
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Allyn T. Londregan
- Pfizer Medicinal Sciences, Eastern Point Road, Groton, Connecticut 06340, United States
| |
Collapse
|
14
|
Chen JQ, Song LL, Li FX, Shi ZF, Cao XP. Asymmetric formal synthesis of (+)-cycloclavine. Chem Commun (Camb) 2017; 53:12902-12905. [DOI: 10.1039/c7cc08044a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The asymmetric synthesis of Szántay's amine (+)-2, the pivotal precursor for direct access to (+)-cycloclavine (1), is described for the first time in eleven steps with 19.7% overall yield from the commercially available 4-bromoindole.
Collapse
Affiliation(s)
- Jin-Quan Chen
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Le-Le Song
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Feng-Xing Li
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Zi-Fa Shi
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| | - Xiao-Ping Cao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou
- P. R. China
| |
Collapse
|
15
|
McCabe SR, Wipf P. Eight‐Step Enantioselective Total Synthesis of (−)‐Cycloclavine. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608820] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Peter Wipf
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| |
Collapse
|
16
|
McCabe SR, Wipf P. Eight-Step Enantioselective Total Synthesis of (-)-Cycloclavine. Angew Chem Int Ed Engl 2016; 56:324-327. [PMID: 27860203 DOI: 10.1002/anie.201608820] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Indexed: 11/11/2022]
Abstract
The first enantioselective total synthesis of (-)-cycloclavine was accomplished in 8 steps and 7.1 % overall yield. Key features include the first catalytic asymmetric cyclopropanation of allene, mediated by the dirhodium catalyst Rh2 (S-TBPTTL)4 , and the enone 1,2-addition of a new TEMPO carbamate methyl carbanion. An intramolecular strain-promoted Diels-Alder methylenecyclopropane (IMDAMC) reaction provided a pivotal tricyclic enone intermediate with more than 99 % ee after crystallization. The synthesis of (-)-1 was completed by a late-stage intramolecular Diels-Alder furan (IMDAF) cycloaddition to install the indole.
Collapse
Affiliation(s)
- Stephanie R McCabe
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| |
Collapse
|
17
|
Abstract
A short synthetic sequence leading to the formation of the C,D,E-ring subunit of the Aspidosperma alkaloids is reported. This route is based on a ring fragmentation/intramolecular azomethine ylide 1,3-dipolar cycloaddition reaction sequence that gives the desired tricyclic product as a single diastereomer. A γ-amino-β-hydroxy-α-diazo carbonyl compound is shown to fragment in the presence of a Lewis acid to give an iminium product that can be directly reduced to the corresponding amine.
Collapse
Affiliation(s)
- Geoffrey
M. Giampa
- Department of Chemistry, The University of Vermont, Burlington, Vermont 05405, United States
| | - Jian Fang
- Department of Chemistry, The University of Vermont, Burlington, Vermont 05405, United States
| | - Matthias Brewer
- Department of Chemistry, The University of Vermont, Burlington, Vermont 05405, United States
| |
Collapse
|
18
|
McCabe SR, Wipf P. Total synthesis, biosynthesis and biological profiles of clavine alkaloids. Org Biomol Chem 2016; 14:5894-913. [PMID: 27215547 DOI: 10.1039/c6ob00878j] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review highlights noteworthy synthetic and biological aspects of the clavine subfamily of ergot alkaloids. Recent biosynthetic insights have laid the groundwork for a better understanding of the diverse biological pathways leading to these indole derivatives. Ergot alkaloids were among the first fungal-derived natural products identified, inspiring pharmaceutical applications in CNS disorders, migraine, infective diseases, and cancer. Pergolide, for example, is a semi-synthetic clavine alkaloid that has been used to treat Parkinson's disease. Synthetic activities have been particularly valuable to facilitate access to rare members of the Clavine family and empower medicinal chemistry research. Improved molecular target identification tools and a better understanding of signaling pathways can now be deployed to further extend the biological and medical utility of Clavine alkaloids.
Collapse
Affiliation(s)
- Stephanie R McCabe
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | | |
Collapse
|
19
|
Affiliation(s)
- Natalie Netz
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Till Opatz
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| |
Collapse
|
20
|
Jakubczyk D, Caputi L, Hatsch A, Nielsen CAF, Diefenbacher M, Klein J, Molt A, Schröder H, Cheng JZ, Naesby M, O'Connor SE. Discovery and reconstitution of the cycloclavine biosynthetic pathway--enzymatic formation of a cyclopropyl group. Angew Chem Int Ed Engl 2015; 54:5117-21. [PMID: 25712404 PMCID: PMC4471609 DOI: 10.1002/anie.201410002] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 01/29/2015] [Indexed: 12/04/2022]
Abstract
The ergot alkaloids, a class of fungal-derived natural products with important biological activities, are derived from a common intermediate, chanoclavine-I, which is elaborated into a set of diverse structures. Herein we report the discovery of the biosynthetic pathway of cycloclavine, a complex ergot alkaloid containing a cyclopropyl moiety. We used a yeast-based expression platform along with in vitro biochemical experiments to identify the enzyme that catalyzes a rearrangement of the chanoclavine-I intermediate to form a cyclopropyl moiety. The resulting compound, cycloclavine, was produced in yeast at titers of >500 mg L(-1) , thus demonstrating the feasibility of the heterologous expression of these complex alkaloids.
Collapse
Affiliation(s)
- Dorota Jakubczyk
- Department of Biological Chemistry, John Innes CentreColney Lane, Norwich (UK)
| | - Lorenzo Caputi
- Department of Biological Chemistry, John Innes CentreColney Lane, Norwich (UK)
| | | | | | | | - Jens Klein
- Evolva SADuggingerstrasse 23, Reinach (Switzerland)
| | | | | | - Johnathan Z Cheng
- Department of Biological Chemistry, John Innes CentreColney Lane, Norwich (UK)
| | | | - Sarah E O'Connor
- Department of Biological Chemistry, John Innes CentreColney Lane, Norwich (UK)
| |
Collapse
|
21
|
Jakubczyk D, Caputi L, Hatsch A, Nielsen CAF, Diefenbacher M, Klein J, Molt A, Schröder H, Cheng JZ, Naesby M, O'Connor SE. Discovery and Reconstitution of the Cycloclavine Biosynthetic Pathway-Enzymatic Formation of a Cyclopropyl Group. ACTA ACUST UNITED AC 2015; 127:5206-5210. [PMID: 27546918 PMCID: PMC4974921 DOI: 10.1002/ange.201410002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 01/29/2015] [Indexed: 12/05/2022]
Abstract
The ergot alkaloids, a class of fungal‐derived natural products with important biological activities, are derived from a common intermediate, chanoclavine‐I, which is elaborated into a set of diverse structures. Herein we report the discovery of the biosynthetic pathway of cycloclavine, a complex ergot alkaloid containing a cyclopropyl moiety. We used a yeast‐based expression platform along with in vitro biochemical experiments to identify the enzyme that catalyzes a rearrangement of the chanoclavine‐I intermediate to form a cyclopropyl moiety. The resulting compound, cycloclavine, was produced in yeast at titers of >500 mg L−1, thus demonstrating the feasibility of the heterologous expression of these complex alkaloids.
Collapse
Affiliation(s)
- Dorota Jakubczyk
- Department of Biological Chemistry, John Innes Centre, Colney Lane, Norwich (UK)
| | - Lorenzo Caputi
- Department of Biological Chemistry, John Innes Centre, Colney Lane, Norwich (UK)
| | | | | | | | - Jens Klein
- Evolva SA, Duggingerstrasse 23, Reinach (Switzerland)
| | | | | | - Johnathan Z Cheng
- Department of Biological Chemistry, John Innes Centre, Colney Lane, Norwich (UK)
| | | | - Sarah E O'Connor
- Department of Biological Chemistry, John Innes Centre, Colney Lane, Norwich (UK)
| |
Collapse
|