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Xu FF, Chen JQ, Shao DY, Huang PQ. Catalytic enantioselective reductive alkynylation of amides enables one-pot syntheses of pyrrolidine, piperidine and indolizidine alkaloids. Nat Commun 2023; 14:6251. [PMID: 37803030 PMCID: PMC10558451 DOI: 10.1038/s41467-023-41846-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/13/2023] [Indexed: 10/08/2023] Open
Abstract
The primary objective in synthetic organic chemistry is to develop highly efficient, selective, and versatile synthetic methodologies, which are essential for discovering new drug candidates and agrochemicals. In this study, we present a unified strategy for a one-pot, catalytic enantioselective synthesis of α-alkyl and α,α'-dialkyl pyrrolidine, piperidine, and indolizidine alkaloids using readily available amides and alkynes. This synthesis is enabled by the identification and development of an Ir/Cu/N-PINAP catalyzed highly enantioselective and chemoselective reductive alkynylation of α-unbranched aliphatic amides, which serves as the key reaction. This reaction is combined with Pd-catalyzed tandem reactions in a one-pot approach, enabling the collective, catalytic enantioselective total syntheses of eight alkaloids and an anticancer antipode with 90-98% ee. The methodology's enantio-divergence is exemplified by the one-step access to either enantiomer of alkaloid bgugaine.
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Affiliation(s)
- Fang-Fang Xu
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Jin-Quan Chen
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Dong-Yang Shao
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China
| | - Pei-Qiang Huang
- Department of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, P. R. China.
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Ecological Flexibility of Propithecus edwardsi in Two Forest Habitats with Different Logging Histories in Ranomafana National Park, Madagascar. INT J PRIMATOL 2022. [DOI: 10.1007/s10764-022-00308-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Basham EW, Saporito RA, González‐Pinzón M, Romero‐Marcucci A, Scheffers BR. Chemical defenses shift with the seasonal vertical migration of a Panamanian poison frog. Biotropica 2020. [DOI: 10.1111/btp.12842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Edmund W. Basham
- School of Natural Resources and Environment University of Florida Gainesville FL USA
| | - Ralph A. Saporito
- Department of Biology John Carroll University University Heights OH USA
| | - Macario González‐Pinzón
- Escuela de Biología Facultad de Ciencias naturales y Exactas Universidad Autónoma de Chiriquí David República de Panamá
| | - Angel Romero‐Marcucci
- Escuela de Biología Facultad de Ciencias naturales y Exactas Universidad Autónoma de Chiriquí David República de Panamá
| | - Brett R. Scheffers
- School of Natural Resources and Environment University of Florida Gainesville FL USA
- Department of Wildlife Ecology and Conservation University of Florida Gainesville FL USA
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Moskowitz NA, Dorritie B, Fay T, Nieves OC, Vidoudez C, 2017 Biology Class CRL, 2017 Biotechnology Class M, Fischer EK, Trauger SA, Coloma LA, Donoso DA, O’Connell LA. Land use impacts poison frog chemical defenses through changes in leaf litter ant communities. NEOTROPICAL BIODIVERSITY 2020. [DOI: 10.1080/23766808.2020.1744957] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
| | | | - Tammy Fay
- Masconomet Regional High School, Boxford, MA USA
| | | | - Charles Vidoudez
- Small Molecule Mass Spectrometry Facility, Harvard University, Cambridge, MA, USA
| | | | | | - Eva K. Fischer
- Department of Biology, Stanford University, Stanford, CA, USA
| | - Sunia A. Trauger
- Small Molecule Mass Spectrometry Facility, Harvard University, Cambridge, MA, USA
| | - Luis A. Coloma
- Centro Jambatu De Investigación Y Conservación De Anfibios, Fundación Jambatu, San Rafael, Quito, Ecuador
| | - David A. Donoso
- Departamento De Biología, Escuela Politécnica Nacional, Quito, Ecuador
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Geographically separated orange and blue populations of the Amazonian poison frog Adelphobates galactonotus (Anura, Dendrobatidae) do not differ in alkaloid composition or palatability. CHEMOECOLOGY 2019. [DOI: 10.1007/s00049-019-00291-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Rogers RL, Zhou L, Chu C, Márquez R, Corl A, Linderoth T, Freeborn L, MacManes MD, Xiong Z, Zheng J, Guo C, Xun X, Kronforst MR, Summers K, Wu Y, Yang H, Richards-Zawacki CL, Zhang G, Nielsen R. Genomic Takeover by Transposable Elements in the Strawberry Poison Frog. Mol Biol Evol 2019; 35:2913-2927. [PMID: 30517748 PMCID: PMC6278860 DOI: 10.1093/molbev/msy185] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We sequenced the genome of the strawberry poison frog, Oophaga pumilio, at a depth of 127.5× using variable insert size libraries. The total genome size is estimated to be 6.76 Gb, of which 4.76 Gb are from high copy number repetitive elements with low differentiation across copies. These repeats encompass DNA transposons, RNA transposons, and LTR retrotransposons, including at least 0.4 and 1.0 Gb of Mariner/Tc1 and Gypsy elements, respectively. Expression data indicate high levels of gypsy and Mariner/Tc1 expression in ova of O. pumilio compared with Xenopus laevis. We further observe phylogenetic evidence for horizontal transfer (HT) of Mariner elements, possibly between fish and frogs. The elements affected by HT are present in high copy number and are highly expressed, suggesting ongoing proliferation after HT. Our results suggest that the large amphibian genome sizes, at least partially, can be explained by a process of repeated invasion of new transposable elements that are not yet suppressed in the germline. We also find changes in the spliceosome that we hypothesize are related to permissiveness of O. pumilio to increases in intron length due to transposon proliferation. Finally, we identify the complement of ion channels in the first genomic sequenced poison frog and discuss its relation to the evolution of autoresistance to toxins sequestered in the skin.
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Affiliation(s)
- Rebekah L Rogers
- Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, Charlotte, NC
| | - Long Zhou
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.,China National Genebank, BGI-Shenzhen, Shenzhen, Guangdong, China
| | - Chong Chu
- Harvard Medical School, Harvard University, Cambridge, MA
| | - Roberto Márquez
- Department of Ecology and Evolution, University of Chicago, Chicago, IL
| | - Ammon Corl
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA
| | - Tyler Linderoth
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA
| | - Layla Freeborn
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA
| | - Matthew D MacManes
- Department of Molecular Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH.,Hubbard Center for Genomic Studies, University of New Hampshire, Durham, NH
| | - Zijun Xiong
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Jiao Zheng
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Chunxue Guo
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | - Xu Xun
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China
| | | | - Kyle Summers
- Department of Biology, Eastern Carolina University, Greenville, NC
| | - Yufeng Wu
- Department of Computer Science, University of Connecticut, Storrs, CT
| | - Huanming Yang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.,James D. Watson Institute of Genome Sciences, Hangzhou, China
| | | | - Guojie Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.,China National Genebank, BGI-Shenzhen, Shenzhen, Guangdong, China.,Department of Biology, Centre for Social Evolution, Universitetsparken 15, University of Copenhagen, Copenhagen, Denmark
| | - Rasmus Nielsen
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA
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Zhou DJ, Li XY, Li D, Guo ZS, Zhang QL, Bie HY, Cui ZG. Synthesis of dehydroindolizidine-type poison-frog alkaloids via Michael-type conjugate addition. JOURNAL OF CHEMICAL RESEARCH 2017. [DOI: 10.3184/174751917x14967701766987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A concise stereoselective synthesis of proposed dehydroindolizidine-alkaloids of types 179 and 207E1 was accomplished via Michael-type conjugate addition. A comparison of natural 207E and synthesised compound 207E on GC–FTIR revealed the double bond of natural 207E is most likely at the 7,8-position.
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Affiliation(s)
- De-Jun Zhou
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Xue-Yan Li
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Dong Li
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Zhong-Shuai Guo
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Qin-Ling Zhang
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Hong-yan Bie
- School of Chemistry & Chemical Engineering, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
| | - Zheng-Guo Cui
- Medical School, Henan polytechnic University, Jiaozuo, 454000, Henan Province, P.R. China
- Graduate School of Medicine and Pharmaceutical Science, University of Toyama, 2630 Sugitani, Toyama 930-0194 Japan
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Individual and Geographic Variation of Skin Alkaloids in Three Swamp-Forest Species of Madagascan Poison Frogs (Mantella). J Chem Ecol 2015; 41:837-47. [PMID: 26329921 DOI: 10.1007/s10886-015-0616-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 05/14/2015] [Accepted: 08/10/2015] [Indexed: 10/23/2022]
Abstract
Seventy skins of three mantellid frog species from Madagascan swamp-forest habitats, Mantella aurantiaca, M. crocea, and M. milotympanum, were individually examined for skin alkaloids using GC/MS. These poison frogs were found to differ significantly in their alkaloid composition from species of Mantella originating from non-flooded rainforest in eastern Madagascar, which were examined in earlier work. Only 16 of the previously detected 106 alkaloids were represented among the 60 alkaloids from the swamp-forest frogs of the present study. We hypothesize this difference is related mainly to habitat but cannot exclude a phylogenetic component as the three swamp-forest species are a closely related monophyletic group. The paucity of alkaloids with unbranched-carbon skeletons (ant-derived) and the commonness of alkaloids with branched-carbon skeletons (mite-derived) indicate that oribatid mites are a major source of alkaloids in these species of mantellids. Furthermore, most of the alkaloids have an oxygen atom in their formulae. Differences in alkaloids were observed among species, populations of the same species, and habitats. In M. aurantiaca, small geographic distances among populations were associated with differences in alkaloid profiles, with a remote third site illustrating even greater differences. The present study and an earlier study of three other mantellid species suggest that oribatid mites, and not ants, are the major source of alkaloids in the species of mantellids examined thus far.
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Abstract
This review of simple indolizidine and quinolizidine alkaloids (i.e., those in which the parent bicyclic systems are in general not embedded in polycyclic arrays) is an update of the previous coverage in Volume 55 of this series (2001). The present survey covers the literature from mid-1999 to the end of 2013; and in addition to aspects of the isolation, characterization, and biological activity of the alkaloids, much emphasis is placed on their total synthesis. A brief introduction to the topic is followed by an overview of relevant alkaloids from fungal and microbial sources, among them slaframine, cyclizidine, Steptomyces metabolites, and the pantocins. The important iminosugar alkaloids lentiginosine, steviamine, swainsonine, castanospermine, and related hydroxyindolizidines are dealt with in the subsequent section. The fourth and fifth sections cover metabolites from terrestrial plants. Pertinent plant alkaloids bearing alkyl, functionalized alkyl or alkenyl substituents include dendroprimine, anibamine, simple alkaloids belonging to the genera Prosopis, Elaeocarpus, Lycopodium, and Poranthera, and bicyclic alkaloids of the lupin family. Plant alkaloids bearing aryl or heteroaryl substituents include ipalbidine and analogs, secophenanthroindolizidine and secophenanthroquinolizidine alkaloids (among them septicine, julandine, and analogs), ficuseptine, lasubines, and other simple quinolizidines of the Lythraceae, the simple furyl-substituted Nuphar alkaloids, and a mixed quinolizidine-quinazoline alkaloid. The penultimate section of the review deals with the sizable group of simple indolizidine and quinolizidine alkaloids isolated from, or detected in, ants, mites, and terrestrial amphibians, and includes an overview of the "dietary hypothesis" for the origin of the amphibian metabolites. The final section surveys relevant alkaloids from marine sources, and includes clathryimines and analogs, stellettamides, the clavepictines and pictamine, and bis(quinolizidine) alkaloids.
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Stuckert AMM, Saporito RA, Venegas PJ, Summers K. Alkaloid defenses of co-mimics in a putative Müllerian mimetic radiation. BMC Evol Biol 2014; 14:76. [PMID: 24707851 DOI: 10.1186/1471-2148-14-76] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 03/31/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Polytypism in aposematic species is unlikely according to theory, but commonly seen in nature. Ranitomeya imitator is a poison frog species exhibiting polytypic mimicry of three congeneric model species (R. fantastica, R. summersi, and two morphs of R. variabilis) across four allopatric populations (a "mimetic radiation"). In order to investigate chemical defenses in this system, a key prediction of Müllerian mimicry, we analyzed the alkaloids of both models and mimics from four allopatric populations. RESULTS In this study we demonstrate distinct differences in alkaloid profiles between co-mimetic species within allopatric populations. We further demonstrate that R. imitator has a greater number of distinct alkaloid types than the model species and more total alkaloids in all but one population. CONCLUSIONS Given that R. imitator is the more abundant species in these populations, R. imitator is likely driving the majority of predator-learned avoidance in these complexes. The success of Ranitomeya imitator as a putative advergent mimic may be a direct result of differences in alkaloid sequestration. Furthermore, we propose that automimicry within co-mimetic species is an important avenue of research.
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Affiliation(s)
- Adam M M Stuckert
- Department of Biology, East Carolina University, 1000 E, Fifth St, Greenville, NC 27858, USA.
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